[ty] A todo type for type[T]

Co-authored-by: Micha Reiser <micha@reiser.io>

.github/workflows/ci.yaml

@@ -261,15 +261,15 @@ jobs:
       - name: "Install mold"
         uses: rui314/setup-mold@725a8794d15fc7563f59595bd9556495c0564878 # v1
       - name: "Install cargo nextest"
-        uses: taiki-e/install-action@537c30d2b45cc3aa3fb35e2bbcfb61ef93fd6f02 # v2.62.52
+        uses: taiki-e/install-action@f79fe7514db78f0a7bdba3cb6dd9c1baa7d046d9 # v2.62.56
         with:
           tool: cargo-nextest
       - name: "Install cargo insta"
-        uses: taiki-e/install-action@537c30d2b45cc3aa3fb35e2bbcfb61ef93fd6f02 # v2.62.52
+        uses: taiki-e/install-action@f79fe7514db78f0a7bdba3cb6dd9c1baa7d046d9 # v2.62.56
         with:
           tool: cargo-insta
       - name: "Install uv"
-        uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+        uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
         with:
           enable-cache: "true"
       - name: ty mdtests (GitHub annotations)
@@ -284,6 +284,10 @@ jobs:
         run: cargo insta test --all-features --unreferenced reject --test-runner nextest
       - name: Dogfood ty on py-fuzzer
         run: uv run --project=./python/py-fuzzer cargo run -p ty check --project=./python/py-fuzzer
+      - name: Dogfood ty on the scripts directory
+        run: uv run --project=./scripts cargo run -p ty check --project=./scripts
+      - name: Dogfood ty on ty_benchmark
+        run: uv run --project=./scripts/ty_benchmark cargo run -p ty check --project=./scripts/ty_benchmark
       # Check for broken links in the documentation.
       - run: cargo doc --all --no-deps
         env:
@@ -319,11 +323,11 @@ jobs:
       - name: "Install mold"
         uses: rui314/setup-mold@725a8794d15fc7563f59595bd9556495c0564878 # v1
       - name: "Install cargo nextest"
-        uses: taiki-e/install-action@537c30d2b45cc3aa3fb35e2bbcfb61ef93fd6f02 # v2.62.52
+        uses: taiki-e/install-action@f79fe7514db78f0a7bdba3cb6dd9c1baa7d046d9 # v2.62.56
         with:
           tool: cargo-nextest
       - name: "Install uv"
-        uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+        uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
         with:
           enable-cache: "true"
       - name: "Run tests"
@@ -352,11 +356,11 @@ jobs:
       - name: "Install Rust toolchain"
         run: rustup show
       - name: "Install cargo nextest"
-        uses: taiki-e/install-action@537c30d2b45cc3aa3fb35e2bbcfb61ef93fd6f02 # v2.62.52
+        uses: taiki-e/install-action@f79fe7514db78f0a7bdba3cb6dd9c1baa7d046d9 # v2.62.56
         with:
           tool: cargo-nextest
       - name: "Install uv"
-        uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+        uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
         with:
           enable-cache: "true"
       - name: "Run tests"
@@ -462,7 +466,7 @@ jobs:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           persist-credentials: false
-      - uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+      - uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
       - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
         with:
           shared-key: ruff-linux-debug
@@ -497,7 +501,7 @@ jobs:
       - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
         with:
           save-if: ${{ github.ref == 'refs/heads/main' }}
-      - uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+      - uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
       - name: "Install Rust toolchain"
         run: rustup component add rustfmt
       # Run all code generation scripts, and verify that the current output is
@@ -532,7 +536,7 @@ jobs:
           ref: ${{ github.event.pull_request.base.ref }}
           persist-credentials: false
 
-      - uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+      - uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
         with:
           python-version: ${{ env.PYTHON_VERSION }}
           activate-environment: true
@@ -638,7 +642,7 @@ jobs:
         with:
           fetch-depth: 0
           persist-credentials: false
-      - uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+      - uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
       - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
         with:
           save-if: ${{ github.ref == 'refs/heads/main' }}
@@ -697,7 +701,7 @@ jobs:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           persist-credentials: false
-      - uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+      - uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
       - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
         with:
           save-if: ${{ github.ref == 'refs/heads/main' }}
@@ -748,7 +752,7 @@ jobs:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           persist-credentials: false
-      - uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+      - uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
       - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
         with:
           save-if: ${{ github.ref == 'refs/heads/main' }}
@@ -792,7 +796,7 @@ jobs:
       - name: "Install Rust toolchain"
         run: rustup show
       - name: Install uv
-        uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+        uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
         with:
           python-version: 3.13
           activate-environment: true
@@ -947,13 +951,13 @@ jobs:
       - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
         with:
           save-if: ${{ github.ref == 'refs/heads/main' }}
-      - uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+      - uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
 
       - name: "Install Rust toolchain"
         run: rustup show
 
       - name: "Install codspeed"
-        uses: taiki-e/install-action@537c30d2b45cc3aa3fb35e2bbcfb61ef93fd6f02 # v2.62.52
+        uses: taiki-e/install-action@f79fe7514db78f0a7bdba3cb6dd9c1baa7d046d9 # v2.62.56
         with:
           tool: cargo-codspeed
 
@@ -987,13 +991,13 @@ jobs:
       - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
         with:
           save-if: ${{ github.ref == 'refs/heads/main' }}
-      - uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+      - uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
 
       - name: "Install Rust toolchain"
         run: rustup show
 
       - name: "Install codspeed"
-        uses: taiki-e/install-action@537c30d2b45cc3aa3fb35e2bbcfb61ef93fd6f02 # v2.62.52
+        uses: taiki-e/install-action@f79fe7514db78f0a7bdba3cb6dd9c1baa7d046d9 # v2.62.56
         with:
           tool: cargo-codspeed
 
@@ -1027,13 +1031,13 @@ jobs:
       - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
         with:
           save-if: ${{ github.ref == 'refs/heads/main' }}
-      - uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+      - uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
 
       - name: "Install Rust toolchain"
         run: rustup show
 
       - name: "Install codspeed"
-        uses: taiki-e/install-action@537c30d2b45cc3aa3fb35e2bbcfb61ef93fd6f02 # v2.62.52
+        uses: taiki-e/install-action@f79fe7514db78f0a7bdba3cb6dd9c1baa7d046d9 # v2.62.56
         with:
           tool: cargo-codspeed
 

.github/workflows/daily_fuzz.yaml

@@ -34,7 +34,7 @@ jobs:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           persist-credentials: false
-      - uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+      - uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
       - name: "Install Rust toolchain"
         run: rustup show
       - name: "Install mold"

.github/workflows/mypy_primer.yaml

@@ -43,7 +43,7 @@ jobs:
           persist-credentials: false
 
       - name: Install the latest version of uv
-        uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+        uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
 
       - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
         with:
@@ -55,6 +55,7 @@ jobs:
       - name: Run mypy_primer
         env:
           PRIMER_SELECTOR: crates/ty_python_semantic/resources/primer/good.txt
+          CLICOLOR_FORCE: "1"
           DIFF_FILE: mypy_primer.diff
         run: |
           cd ruff
@@ -80,7 +81,7 @@ jobs:
           persist-credentials: false
 
       - name: Install the latest version of uv
-        uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+        uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
 
       - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
         with:

.github/workflows/publish-pypi.yml

@@ -22,7 +22,7 @@ jobs:
       id-token: write
     steps:
       - name: "Install uv"
-        uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+        uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
       - uses: actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0 # v5.0.0
         with:
           pattern: wheels-*

.github/workflows/release.yml

@@ -60,7 +60,7 @@ jobs:
     env:
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-      - uses: actions/checkout@ff7abcd0c3c05ccf6adc123a8cd1fd4fb30fb493
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3
         with:
           persist-credentials: false
           submodules: recursive
@@ -123,7 +123,7 @@ jobs:
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       BUILD_MANIFEST_NAME: target/distrib/global-dist-manifest.json
     steps:
-      - uses: actions/checkout@ff7abcd0c3c05ccf6adc123a8cd1fd4fb30fb493
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3
         with:
           persist-credentials: false
           submodules: recursive
@@ -174,7 +174,7 @@ jobs:
     outputs:
       val: ${{ steps.host.outputs.manifest }}
     steps:
-      - uses: actions/checkout@ff7abcd0c3c05ccf6adc123a8cd1fd4fb30fb493
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3
         with:
           persist-credentials: false
           submodules: recursive
@@ -250,7 +250,7 @@ jobs:
     env:
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-      - uses: actions/checkout@ff7abcd0c3c05ccf6adc123a8cd1fd4fb30fb493
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3
         with:
           persist-credentials: false
           submodules: recursive

.github/workflows/sync_typeshed.yaml

@@ -77,7 +77,7 @@ jobs:
         run: |
           git config --global user.name typeshedbot
           git config --global user.email '<>'
-      - uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+      - uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
       - name: Sync typeshed stubs
         run: |
           rm -rf "ruff/${VENDORED_TYPESHED}"
@@ -131,7 +131,7 @@ jobs:
         with:
           persist-credentials: true
           ref: ${{ env.UPSTREAM_BRANCH}}
-      - uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+      - uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
       - name: Setup git
         run: |
           git config --global user.name typeshedbot
@@ -170,7 +170,7 @@ jobs:
         with:
           persist-credentials: true
           ref: ${{ env.UPSTREAM_BRANCH}}
-      - uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+      - uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
       - name: Setup git
         run: |
           git config --global user.name typeshedbot
@@ -207,12 +207,12 @@ jobs:
         uses: rui314/setup-mold@725a8794d15fc7563f59595bd9556495c0564878 # v1
       - name: "Install cargo nextest"
         if: ${{ success() }}
-        uses: taiki-e/install-action@537c30d2b45cc3aa3fb35e2bbcfb61ef93fd6f02 # v2.62.52
+        uses: taiki-e/install-action@f79fe7514db78f0a7bdba3cb6dd9c1baa7d046d9 # v2.62.56
         with:
           tool: cargo-nextest
       - name: "Install cargo insta"
         if: ${{ success() }}
-        uses: taiki-e/install-action@537c30d2b45cc3aa3fb35e2bbcfb61ef93fd6f02 # v2.62.52
+        uses: taiki-e/install-action@f79fe7514db78f0a7bdba3cb6dd9c1baa7d046d9 # v2.62.56
         with:
           tool: cargo-insta
       - name: Update snapshots

.github/workflows/ty-ecosystem-analyzer.yaml

@@ -33,7 +33,7 @@ jobs:
           persist-credentials: false
 
       - name: Install the latest version of uv
-        uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+        uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
         with:
           enable-cache: true # zizmor: ignore[cache-poisoning] acceptable risk for CloudFlare pages artifact
 
@@ -67,7 +67,7 @@ jobs:
 
           cd ..
 
-          uv tool install "git+https://github.com/astral-sh/ecosystem-analyzer@11aa5472cf9d6b9e019c401505a093112942d7bf"
+          uv tool install "git+https://github.com/astral-sh/ecosystem-analyzer@e26ebfb78d372b8b091e1cb1d6fc522e135474c1"
 
           ecosystem-analyzer \
             --repository ruff \

.github/workflows/ty-ecosystem-report.yaml

@@ -29,7 +29,7 @@ jobs:
           persist-credentials: false
 
       - name: Install the latest version of uv
-        uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7.1.3
+        uses: astral-sh/setup-uv@1e862dfacbd1d6d858c55d9b792c756523627244 # v7.1.4
         with:
           enable-cache: true # zizmor: ignore[cache-poisoning] acceptable risk for CloudFlare pages artifact
 
@@ -52,7 +52,7 @@ jobs:
 
           cd ..
 
-          uv tool install "git+https://github.com/astral-sh/ecosystem-analyzer@11aa5472cf9d6b9e019c401505a093112942d7bf"
+          uv tool install "git+https://github.com/astral-sh/ecosystem-analyzer@e26ebfb78d372b8b091e1cb1d6fc522e135474c1"
 
           ecosystem-analyzer \
             --verbose \

.vscode/settings.json

@@ -5,5 +5,6 @@
     "rust-analyzer.check.command": "clippy",
     "search.exclude": {
         "**/*.snap": true
-    }
+    },
+    "ty.diagnosticMode": "openFilesOnly"
 }

CHANGELOG.md

@@ -1,5 +1,48 @@
 # Changelog
 
+## 0.14.6
+
+Released on 2025-11-21.
+
+### Preview features
+
+- \[`flake8-bandit`\] Support new PySNMP API paths (`S508`, `S509`) ([#21374](https://github.com/astral-sh/ruff/pull/21374))
+
+### Bug fixes
+
+- Adjust own-line comment placement between branches ([#21185](https://github.com/astral-sh/ruff/pull/21185))
+- Avoid syntax error when formatting attribute expressions with outer parentheses, parenthesized value, and trailing comment on value ([#20418](https://github.com/astral-sh/ruff/pull/20418))
+- Fix panic when formatting comments in unary expressions ([#21501](https://github.com/astral-sh/ruff/pull/21501))
+- Respect `fmt: skip` for compound statements on a single line ([#20633](https://github.com/astral-sh/ruff/pull/20633))
+- \[`refurb`\] Fix `FURB103` autofix ([#21454](https://github.com/astral-sh/ruff/pull/21454))
+- \[`ruff`\] Fix false positive for complex conversion specifiers in `logging-eager-conversion` (`RUF065`) ([#21464](https://github.com/astral-sh/ruff/pull/21464))
+
+### Rule changes
+
+- \[`ruff`\] Avoid false positive on `ClassVar` reassignment (`RUF012`) ([#21478](https://github.com/astral-sh/ruff/pull/21478))
+
+### CLI
+
+- Render hyperlinks for lint errors ([#21514](https://github.com/astral-sh/ruff/pull/21514))
+- Add a `ruff analyze` option to skip over imports in `TYPE_CHECKING` blocks ([#21472](https://github.com/astral-sh/ruff/pull/21472))
+
+### Documentation
+
+- Limit `eglot-format` hook to eglot-managed Python buffers ([#21459](https://github.com/astral-sh/ruff/pull/21459))
+- Mention `force-exclude` in "Configuration > Python file discovery" ([#21500](https://github.com/astral-sh/ruff/pull/21500))
+
+### Contributors
+
+- [@ntBre](https://github.com/ntBre)
+- [@dylwil3](https://github.com/dylwil3)
+- [@gauthsvenkat](https://github.com/gauthsvenkat)
+- [@MichaReiser](https://github.com/MichaReiser)
+- [@thamer](https://github.com/thamer)
+- [@Ruchir28](https://github.com/Ruchir28)
+- [@thejcannon](https://github.com/thejcannon)
+- [@danparizher](https://github.com/danparizher)
+- [@chirizxc](https://github.com/chirizxc)
+
 ## 0.14.5
 
 Released on 2025-11-13.

Cargo.lock

@@ -442,9 +442,9 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "4.5.51"
+version = "4.5.53"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4c26d721170e0295f191a69bd9a1f93efcdb0aff38684b61ab5750468972e5f5"
+checksum = "c9e340e012a1bf4935f5282ed1436d1489548e8f72308207ea5df0e23d2d03f8"
 dependencies = [
  "clap_builder",
  "clap_derive",
@@ -452,9 +452,9 @@ dependencies = [
 
 [[package]]
 name = "clap_builder"
-version = "4.5.51"
+version = "4.5.53"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "75835f0c7bf681bfd05abe44e965760fea999a5286c6eb2d59883634fd02011a"
+checksum = "d76b5d13eaa18c901fd2f7fca939fefe3a0727a953561fefdf3b2922b8569d00"
 dependencies = [
  "anstream",
  "anstyle",
@@ -642,7 +642,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "117725a109d387c937a1533ce01b450cbde6b88abceea8473c4d7a85853cda3c"
 dependencies = [
  "lazy_static",
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -651,7 +651,7 @@ version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fde0e0ec90c9dfb3b4b1a0891a7dcd0e2bffde2f7efed5fe7c9bb00e5bfb915e"
 dependencies = [
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -1016,7 +1016,7 @@ dependencies = [
  "libc",
  "option-ext",
  "redox_users",
- "windows-sys 0.60.2",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -1255,7 +1255,8 @@ checksum = "ac7bb8710e1f09672102be7ddf39f764d8440ae74a9f4e30aaa4820dcdffa4af"
 dependencies = [
  "compact_str",
  "get-size-derive2",
- "hashbrown 0.16.0",
+ "hashbrown 0.16.1",
+ "indexmap",
  "smallvec",
 ]
 
@@ -1352,9 +1353,9 @@ dependencies = [
 
 [[package]]
 name = "hashbrown"
-version = "0.16.0"
+version = "0.16.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5419bdc4f6a9207fbeba6d11b604d481addf78ecd10c11ad51e76c2f6482748d"
+checksum = "841d1cc9bed7f9236f321df977030373f4a4163ae1a7dbfe1a51a2c1a51d9100"
 dependencies = [
  "equivalent",
 ]
@@ -1563,12 +1564,12 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "2.12.0"
+version = "2.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6717a8d2a5a929a1a2eb43a12812498ed141a0bcfb7e8f7844fbdbe4303bba9f"
+checksum = "0ad4bb2b565bca0645f4d68c5c9af97fba094e9791da685bf83cb5f3ce74acf2"
 dependencies = [
  "equivalent",
- "hashbrown 0.16.0",
+ "hashbrown 0.16.1",
  "serde",
  "serde_core",
 ]
@@ -1698,7 +1699,7 @@ checksum = "e04d7f318608d35d4b61ddd75cbdaee86b023ebe2bd5a66ee0915f0bf93095a9"
 dependencies = [
  "hermit-abi",
  "libc",
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -2858,7 +2859,7 @@ dependencies = [
 
 [[package]]
 name = "ruff"
-version = "0.14.5"
+version = "0.14.6"
 dependencies = [
  "anyhow",
  "argfile",
@@ -3004,6 +3005,7 @@ dependencies = [
  "serde",
  "serde_json",
  "similar",
+ "supports-hyperlinks",
  "tempfile",
  "thiserror 2.0.17",
  "tracing",
@@ -3115,7 +3117,7 @@ dependencies = [
 
 [[package]]
 name = "ruff_linter"
-version = "0.14.5"
+version = "0.14.6"
 dependencies = [
  "aho-corasick",
  "anyhow",
@@ -3125,7 +3127,7 @@ dependencies = [
  "fern",
  "glob",
  "globset",
- "hashbrown 0.16.0",
+ "hashbrown 0.16.1",
  "imperative",
  "insta",
  "is-macro",
@@ -3470,7 +3472,7 @@ dependencies = [
 
 [[package]]
 name = "ruff_wasm"
-version = "0.14.5"
+version = "0.14.6"
 dependencies = [
  "console_error_panic_hook",
  "console_log",
@@ -3586,7 +3588,7 @@ checksum = "28d3b2b1366ec20994f1fd18c3c594f05c5dd4bc44d8bb0c1c632c8d6829481f"
 [[package]]
 name = "salsa"
 version = "0.24.0"
-source = "git+https://github.com/salsa-rs/salsa.git?rev=a885bb4c4c192741b8a17418fef81a71e33d111e#a885bb4c4c192741b8a17418fef81a71e33d111e"
+source = "git+https://github.com/salsa-rs/salsa.git?rev=17bc55d699565e5a1cb1bd42363b905af2f9f3e7#17bc55d699565e5a1cb1bd42363b905af2f9f3e7"
 dependencies = [
  "boxcar",
  "compact_str",
@@ -3610,12 +3612,12 @@ dependencies = [
 [[package]]
 name = "salsa-macro-rules"
 version = "0.24.0"
-source = "git+https://github.com/salsa-rs/salsa.git?rev=a885bb4c4c192741b8a17418fef81a71e33d111e#a885bb4c4c192741b8a17418fef81a71e33d111e"
+source = "git+https://github.com/salsa-rs/salsa.git?rev=17bc55d699565e5a1cb1bd42363b905af2f9f3e7#17bc55d699565e5a1cb1bd42363b905af2f9f3e7"
 
 [[package]]
 name = "salsa-macros"
 version = "0.24.0"
-source = "git+https://github.com/salsa-rs/salsa.git?rev=a885bb4c4c192741b8a17418fef81a71e33d111e#a885bb4c4c192741b8a17418fef81a71e33d111e"
+source = "git+https://github.com/salsa-rs/salsa.git?rev=17bc55d699565e5a1cb1bd42363b905af2f9f3e7#17bc55d699565e5a1cb1bd42363b905af2f9f3e7"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3926,10 +3928,16 @@ dependencies = [
 ]
 
 [[package]]
-name = "syn"
-version = "2.0.110"
+name = "supports-hyperlinks"
+version = "3.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a99801b5bd34ede4cf3fc688c5919368fea4e4814a4664359503e6015b280aea"
+checksum = "804f44ed3c63152de6a9f90acbea1a110441de43006ea51bcce8f436196a288b"
+
+[[package]]
+name = "syn"
+version = "2.0.111"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "390cc9a294ab71bdb1aa2e99d13be9c753cd2d7bd6560c77118597410c4d2e87"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -4454,7 +4462,7 @@ dependencies = [
  "drop_bomb",
  "get-size2",
  "glob",
- "hashbrown 0.16.0",
+ "hashbrown 0.16.1",
  "indexmap",
  "indoc",
  "insta",

Cargo.toml

@@ -146,7 +146,7 @@ regex-automata = { version = "0.4.9" }
 rustc-hash = { version = "2.0.0" }
 rustc-stable-hash = { version = "0.1.2" }
 # When updating salsa, make sure to also update the revision in `fuzz/Cargo.toml`
-salsa = { git = "https://github.com/salsa-rs/salsa.git", rev = "a885bb4c4c192741b8a17418fef81a71e33d111e", default-features = false, features = [
+salsa = { git = "https://github.com/salsa-rs/salsa.git", rev = "17bc55d699565e5a1cb1bd42363b905af2f9f3e7", default-features = false, features = [
     "compact_str",
     "macros",
     "salsa_unstable",
@@ -173,6 +173,7 @@ snapbox = { version = "0.6.0", features = [
 static_assertions = "1.1.0"
 strum = { version = "0.27.0", features = ["strum_macros"] }
 strum_macros = { version = "0.27.0" }
+supports-hyperlinks = { version = "3.1.0" }
 syn = { version = "2.0.55" }
 tempfile = { version = "3.9.0" }
 test-case = { version = "3.3.1" }

README.md

@@ -147,8 +147,8 @@ curl -LsSf https://astral.sh/ruff/install.sh | sh
 powershell -c "irm https://astral.sh/ruff/install.ps1 | iex"
 
 # For a specific version.
-curl -LsSf https://astral.sh/ruff/0.14.5/install.sh | sh
-powershell -c "irm https://astral.sh/ruff/0.14.5/install.ps1 | iex"
+curl -LsSf https://astral.sh/ruff/0.14.6/install.sh | sh
+powershell -c "irm https://astral.sh/ruff/0.14.6/install.ps1 | iex"
 ```
 
 You can also install Ruff via [Homebrew](https://formulae.brew.sh/formula/ruff), [Conda](https://anaconda.org/conda-forge/ruff),
@@ -181,7 +181,7 @@ Ruff can also be used as a [pre-commit](https://pre-commit.com/) hook via [`ruff
 ```yaml
 - repo: https://github.com/astral-sh/ruff-pre-commit
   # Ruff version.
-  rev: v0.14.5
+  rev: v0.14.6
   hooks:
     # Run the linter.
     - id: ruff-check

crates/ruff/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ruff"
-version = "0.14.5"
+version = "0.14.6"
 publish = true
 authors = { workspace = true }
 edition = { workspace = true }

crates/ruff_annotate_snippets/src/renderer/display_list.rs

@@ -31,7 +31,7 @@
 //! styling.
 //!
 //! The above snippet has been built out of the following structure:
-use crate::snippet;
+use crate::{Id, snippet};
 use std::cmp::{Reverse, max, min};
 use std::collections::HashMap;
 use std::fmt::Display;
@@ -189,6 +189,7 @@ impl DisplaySet<'_> {
         }
         Ok(())
     }
+
     fn format_annotation(
         &self,
         line_offset: usize,
@@ -199,11 +200,13 @@ impl DisplaySet<'_> {
     ) -> fmt::Result {
         let hide_severity = annotation.annotation_type.is_none();
         let color = get_annotation_style(&annotation.annotation_type, stylesheet);
+
         let formatted_len = if let Some(id) = &annotation.id {
+            let id_len = id.id.len();
             if hide_severity {
-                id.len()
+                id_len
             } else {
-                2 + id.len() + annotation_type_len(&annotation.annotation_type)
+                2 + id_len + annotation_type_len(&annotation.annotation_type)
             }
         } else {
             annotation_type_len(&annotation.annotation_type)
@@ -256,9 +259,20 @@ impl DisplaySet<'_> {
             let annotation_type = annotation_type_str(&annotation.annotation_type);
             if let Some(id) = annotation.id {
                 if hide_severity {
-                    buffer.append(line_offset, &format!("{id} "), *stylesheet.error());
+                    buffer.append(
+                        line_offset,
+                        &format!("{id} ", id = fmt_with_hyperlink(id.id, id.url, stylesheet)),
+                        *stylesheet.error(),
+                    );
                 } else {
-                    buffer.append(line_offset, &format!("{annotation_type}[{id}]"), *color);
+                    buffer.append(
+                        line_offset,
+                        &format!(
+                            "{annotation_type}[{id}]",
+                            id = fmt_with_hyperlink(id.id, id.url, stylesheet)
+                        ),
+                        *color,
+                    );
                 }
             } else {
                 buffer.append(line_offset, annotation_type, *color);
@@ -707,7 +721,7 @@ impl DisplaySet<'_> {
                             let style =
                                 get_annotation_style(&annotation.annotation_type, stylesheet);
                             let mut formatted_len = if let Some(id) = &annotation.annotation.id {
-                                2 + id.len()
+                                2 + id.id.len()
                                     + annotation_type_len(&annotation.annotation.annotation_type)
                             } else {
                                 annotation_type_len(&annotation.annotation.annotation_type)
@@ -724,7 +738,10 @@ impl DisplaySet<'_> {
                             } else if formatted_len != 0 {
                                 formatted_len += 2;
                                 let id = match &annotation.annotation.id {
-                                    Some(id) => format!("[{id}]"),
+                                    Some(id) => format!(
+                                        "[{id}]",
+                                        id = fmt_with_hyperlink(&id.id, id.url, stylesheet)
+                                    ),
                                     None => String::new(),
                                 };
                                 buffer.puts(
@@ -827,7 +844,7 @@ impl DisplaySet<'_> {
 #[derive(Clone, Debug, PartialEq)]
 pub(crate) struct Annotation<'a> {
     pub(crate) annotation_type: DisplayAnnotationType,
-    pub(crate) id: Option<&'a str>,
+    pub(crate) id: Option<Id<'a>>,
     pub(crate) label: Vec<DisplayTextFragment<'a>>,
     pub(crate) is_fixable: bool,
 }
@@ -1140,7 +1157,7 @@ fn format_message<'m>(
 
 fn format_title<'a>(
     level: crate::Level,
-    id: Option<&'a str>,
+    id: Option<Id<'a>>,
     label: &'a str,
     is_fixable: bool,
 ) -> DisplayLine<'a> {
@@ -1158,7 +1175,7 @@ fn format_title<'a>(
 
 fn format_footer<'a>(
     level: crate::Level,
-    id: Option<&'a str>,
+    id: Option<Id<'a>>,
     label: &'a str,
 ) -> Vec<DisplayLine<'a>> {
     let mut result = vec![];
@@ -1706,6 +1723,7 @@ fn format_body<'m>(
                             annotation: Annotation {
                                 annotation_type,
                                 id: None,
+
                                 label: format_label(annotation.label, None),
                                 is_fixable: false,
                             },
@@ -1887,3 +1905,40 @@ fn char_width(c: char) -> Option<usize> {
         unicode_width::UnicodeWidthChar::width(c)
     }
 }
+
+pub(super) fn fmt_with_hyperlink<'a, T>(
+    content: T,
+    url: Option<&'a str>,
+    stylesheet: &Stylesheet,
+) -> impl std::fmt::Display + 'a
+where
+    T: std::fmt::Display + 'a,
+{
+    struct FmtHyperlink<'a, T> {
+        content: T,
+        url: Option<&'a str>,
+    }
+
+    impl<T> std::fmt::Display for FmtHyperlink<'_, T>
+    where
+        T: std::fmt::Display,
+    {
+        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+            if let Some(url) = self.url {
+                write!(f, "\x1B]8;;{url}\x1B\\")?;
+            }
+
+            self.content.fmt(f)?;
+
+            if self.url.is_some() {
+                f.write_str("\x1B]8;;\x1B\\")?;
+            }
+
+            Ok(())
+        }
+    }
+
+    let url = if stylesheet.hyperlink { url } else { None };
+
+    FmtHyperlink { content, url }
+}

crates/ruff_annotate_snippets/src/renderer/mod.rs

@@ -76,6 +76,7 @@ impl Renderer {
                 }
                 .effects(Effects::BOLD),
                 none: Style::new(),
+                hyperlink: true,
             },
             ..Self::plain()
         }
@@ -154,6 +155,11 @@ impl Renderer {
         self
     }
 
+    pub const fn hyperlink(mut self, hyperlink: bool) -> Self {
+        self.stylesheet.hyperlink = hyperlink;
+        self
+    }
+
     /// Set the string used for when a long line is cut.
     ///
     /// The default is `...` (three `U+002E` characters).

crates/ruff_annotate_snippets/src/renderer/stylesheet.rs

@@ -10,6 +10,7 @@ pub(crate) struct Stylesheet {
     pub(crate) line_no: Style,
     pub(crate) emphasis: Style,
     pub(crate) none: Style,
+    pub(crate) hyperlink: bool,
 }
 
 impl Default for Stylesheet {
@@ -29,6 +30,7 @@ impl Stylesheet {
             line_no: Style::new(),
             emphasis: Style::new(),
             none: Style::new(),
+            hyperlink: false,
         }
     }
 }

crates/ruff_annotate_snippets/src/snippet.rs

@@ -12,13 +12,19 @@
 
 use std::ops::Range;
 
+#[derive(Copy, Clone, Debug, Default, PartialEq)]
+pub(crate) struct Id<'a> {
+    pub(crate) id: &'a str,
+    pub(crate) url: Option<&'a str>,
+}
+
 /// Primary structure provided for formatting
 ///
 /// See [`Level::title`] to create a [`Message`]
 #[derive(Debug)]
 pub struct Message<'a> {
     pub(crate) level: Level,
-    pub(crate) id: Option<&'a str>,
+    pub(crate) id: Option<Id<'a>>,
     pub(crate) title: &'a str,
     pub(crate) snippets: Vec<Snippet<'a>>,
     pub(crate) footer: Vec<Message<'a>>,
@@ -28,7 +34,12 @@ pub struct Message<'a> {
 
 impl<'a> Message<'a> {
     pub fn id(mut self, id: &'a str) -> Self {
-        self.id = Some(id);
+        self.id = Some(Id { id, url: None });
+        self
+    }
+
+    pub fn id_with_url(mut self, id: &'a str, url: Option<&'a str>) -> Self {
+        self.id = Some(Id { id, url });
         self
     }
 

crates/ruff_benchmark/Cargo.toml

@@ -59,8 +59,6 @@ divan = { workspace = true, optional = true }
 anyhow = { workspace = true }
 codspeed-criterion-compat = { workspace = true, default-features = false, optional = true }
 criterion = { workspace = true, default-features = false, optional = true }
-rayon = { workspace = true }
-rustc-hash = { workspace = true }
 serde = { workspace = true }
 serde_json = { workspace = true }
 tracing = { workspace = true }
@@ -88,3 +86,7 @@ mimalloc = { workspace = true }
 
 [target.'cfg(all(not(target_os = "windows"), not(target_os = "openbsd"), any(target_arch = "x86_64", target_arch = "aarch64", target_arch = "powerpc64", target_arch = "riscv64")))'.dev-dependencies]
 tikv-jemallocator = { workspace = true }
+
+[dev-dependencies]
+rustc-hash = { workspace = true }
+rayon = { workspace = true }

crates/ruff_benchmark/benches/ty.rs

@@ -667,7 +667,7 @@ fn attrs(criterion: &mut Criterion) {
             max_dep_date: "2025-06-17",
             python_version: PythonVersion::PY313,
         },
-        110,
+        120,
     );
 
     bench_project(&benchmark, criterion);

crates/ruff_benchmark/benches/ty_walltime.rs

@@ -143,7 +143,7 @@ static FREQTRADE: Benchmark = Benchmark::new(
         max_dep_date: "2025-06-17",
         python_version: PythonVersion::PY312,
     },
-    525,
+    600,
 );
 
 static PANDAS: Benchmark = Benchmark::new(
@@ -163,7 +163,7 @@ static PANDAS: Benchmark = Benchmark::new(
         max_dep_date: "2025-06-17",
         python_version: PythonVersion::PY312,
     },
-    3000,
+    4000,
 );
 
 static PYDANTIC: Benchmark = Benchmark::new(
@@ -181,7 +181,7 @@ static PYDANTIC: Benchmark = Benchmark::new(
         max_dep_date: "2025-06-17",
         python_version: PythonVersion::PY39,
     },
-    5000,
+    7000,
 );
 
 static SYMPY: Benchmark = Benchmark::new(

crates/ruff_db/Cargo.toml

@@ -42,6 +42,7 @@ schemars = { workspace = true, optional = true }
 serde = { workspace = true, optional = true }
 serde_json = { workspace = true, optional = true }
 similar = { workspace = true }
+supports-hyperlinks = { workspace = true }
 thiserror = { workspace = true }
 tracing = { workspace = true }
 tracing-subscriber = { workspace = true, optional = true }

crates/ruff_db/src/diagnostic/mod.rs

@@ -64,6 +64,8 @@ impl Diagnostic {
             id,
             severity,
             message: message.into_diagnostic_message(),
+            custom_concise_message: None,
+            documentation_url: None,
             annotations: vec![],
             subs: vec![],
             fix: None,
@@ -213,6 +215,10 @@ impl Diagnostic {
     /// cases, just converting it to a string (or printing it) will do what
     /// you want.
     pub fn concise_message(&self) -> ConciseMessage<'_> {
+        if let Some(custom_message) = &self.inner.custom_concise_message {
+            return ConciseMessage::Custom(custom_message.as_str());
+        }
+
         let main = self.inner.message.as_str();
         let annotation = self
             .primary_annotation()
@@ -226,6 +232,15 @@ impl Diagnostic {
         }
     }
 
+    /// Set a custom message for the concise formatting of this diagnostic.
+    ///
+    /// This overrides the default behavior of generating a concise message
+    /// from the main diagnostic message and the primary annotation.
+    pub fn set_concise_message(&mut self, message: impl IntoDiagnosticMessage) {
+        Arc::make_mut(&mut self.inner).custom_concise_message =
+            Some(message.into_diagnostic_message());
+    }
+
     /// Returns the severity of this diagnostic.
     ///
     /// Note that this may be different than the severity of sub-diagnostics.
@@ -356,6 +371,14 @@ impl Diagnostic {
             .is_some_and(|fix| fix.applies(config.fix_applicability))
     }
 
+    pub fn documentation_url(&self) -> Option<&str> {
+        self.inner.documentation_url.as_deref()
+    }
+
+    pub fn set_documentation_url(&mut self, url: Option<String>) {
+        Arc::make_mut(&mut self.inner).documentation_url = url;
+    }
+
     /// Returns the offset of the parent statement for this diagnostic if it exists.
     ///
     /// This is primarily used for checking noqa/secondary code suppressions.
@@ -429,28 +452,6 @@ impl Diagnostic {
             .map(|sub| sub.inner.message.as_str())
     }
 
-    /// Returns the URL for the rule documentation, if it exists.
-    pub fn to_ruff_url(&self) -> Option<String> {
-        match self.id() {
-            DiagnosticId::Panic
-            | DiagnosticId::Io
-            | DiagnosticId::InvalidSyntax
-            | DiagnosticId::RevealedType
-            | DiagnosticId::UnknownRule
-            | DiagnosticId::InvalidGlob
-            | DiagnosticId::EmptyInclude
-            | DiagnosticId::UnnecessaryOverridesSection
-            | DiagnosticId::UselessOverridesSection
-            | DiagnosticId::DeprecatedSetting
-            | DiagnosticId::Unformatted
-            | DiagnosticId::InvalidCliOption
-            | DiagnosticId::InternalError => None,
-            DiagnosticId::Lint(lint_name) => {
-                Some(format!("{}/rules/{lint_name}", env!("CARGO_PKG_HOMEPAGE")))
-            }
-        }
-    }
-
     /// Returns the filename for the message.
     ///
     /// Panics if the diagnostic has no primary span, or if its file is not a `SourceFile`.
@@ -530,8 +531,10 @@ impl Diagnostic {
 #[derive(Debug, Clone, Eq, PartialEq, Hash, get_size2::GetSize)]
 struct DiagnosticInner {
     id: DiagnosticId,
+    documentation_url: Option<String>,
     severity: Severity,
     message: DiagnosticMessage,
+    custom_concise_message: Option<DiagnosticMessage>,
     annotations: Vec<Annotation>,
     subs: Vec<SubDiagnostic>,
     fix: Option<Fix>,
@@ -1520,6 +1523,8 @@ pub enum ConciseMessage<'a> {
     /// This indicates that the diagnostic is probably using the old
     /// model.
     Empty,
+    /// A custom concise message has been provided.
+    Custom(&'a str),
 }
 
 impl std::fmt::Display for ConciseMessage<'_> {
@@ -1535,6 +1540,9 @@ impl std::fmt::Display for ConciseMessage<'_> {
                 write!(f, "{main}: {annotation}")
             }
             ConciseMessage::Empty => Ok(()),
+            ConciseMessage::Custom(message) => {
+                write!(f, "{message}")
+            }
         }
     }
 }

crates/ruff_db/src/diagnostic/render.rs

@@ -205,6 +205,7 @@ impl<'a> Resolved<'a> {
 struct ResolvedDiagnostic<'a> {
     level: AnnotateLevel,
     id: Option<String>,
+    documentation_url: Option<String>,
     message: String,
     annotations: Vec<ResolvedAnnotation<'a>>,
     is_fixable: bool,
@@ -240,12 +241,12 @@ impl<'a> ResolvedDiagnostic<'a> {
             // `DisplaySet::format_annotation` for both cases, but this is a small hack to improve
             // the formatting of syntax errors for now. This should also be kept consistent with the
             // concise formatting.
-            Some(diag.secondary_code().map_or_else(
+            diag.secondary_code().map_or_else(
                 || format!("{id}:", id = diag.inner.id),
                 |code| code.to_string(),
-            ))
+            )
         } else {
-            Some(diag.inner.id.to_string())
+            diag.inner.id.to_string()
         };
 
         let level = if config.hide_severity {
@@ -256,7 +257,8 @@ impl<'a> ResolvedDiagnostic<'a> {
 
         ResolvedDiagnostic {
             level,
-            id,
+            id: Some(id),
+            documentation_url: diag.documentation_url().map(ToString::to_string),
             message: diag.inner.message.as_str().to_string(),
             annotations,
             is_fixable: config.show_fix_status && diag.has_applicable_fix(config),
@@ -287,6 +289,7 @@ impl<'a> ResolvedDiagnostic<'a> {
         ResolvedDiagnostic {
             level: diag.inner.severity.to_annotate(),
             id: None,
+            documentation_url: None,
             message: diag.inner.message.as_str().to_string(),
             annotations,
             is_fixable: false,
@@ -385,6 +388,7 @@ impl<'a> ResolvedDiagnostic<'a> {
         RenderableDiagnostic {
             level: self.level,
             id: self.id.as_deref(),
+            documentation_url: self.documentation_url.as_deref(),
             message: &self.message,
             snippets_by_input,
             is_fixable: self.is_fixable,
@@ -485,6 +489,7 @@ struct RenderableDiagnostic<'r> {
     /// An ID is always present for top-level diagnostics and always absent for
     /// sub-diagnostics.
     id: Option<&'r str>,
+    documentation_url: Option<&'r str>,
     /// The message emitted with the diagnostic, before any snippets are
     /// rendered.
     message: &'r str,
@@ -519,7 +524,7 @@ impl RenderableDiagnostic<'_> {
             .is_fixable(self.is_fixable)
             .lineno_offset(self.header_offset);
         if let Some(id) = self.id {
-            message = message.id(id);
+            message = message.id_with_url(id, self.documentation_url);
         }
         message.snippets(snippets)
     }
@@ -2876,6 +2881,12 @@ watermelon
             self.diag.help(message);
             self
         }
+
+        /// Set the documentation URL for the diagnostic.
+        pub(super) fn documentation_url(mut self, url: impl Into<String>) -> DiagnosticBuilder<'e> {
+            self.diag.set_documentation_url(Some(url.into()));
+            self
+        }
     }
 
     /// A helper builder for tersely populating a `SubDiagnostic`.
@@ -2990,6 +3001,7 @@ def fibonacci(n):
                     TextSize::from(10),
                 ))))
                 .noqa_offset(TextSize::from(7))
+                .documentation_url("https://docs.astral.sh/ruff/rules/unused-import")
                 .build(),
             env.builder(
                 "unused-variable",
@@ -3004,11 +3016,13 @@ def fibonacci(n):
                 TextSize::from(99),
             )))
             .noqa_offset(TextSize::from(94))
+            .documentation_url("https://docs.astral.sh/ruff/rules/unused-variable")
             .build(),
             env.builder("undefined-name", Severity::Error, "Undefined name `a`")
                 .primary("undef.py", "1:3", "1:4", "")
                 .secondary_code("F821")
                 .noqa_offset(TextSize::from(3))
+                .documentation_url("https://docs.astral.sh/ruff/rules/undefined-name")
                 .build(),
         ];
 
@@ -3123,6 +3137,7 @@ if call(foo
                     TextSize::from(19),
                 ))))
                 .noqa_offset(TextSize::from(16))
+                .documentation_url("https://docs.astral.sh/ruff/rules/unused-import")
                 .build(),
             env.builder(
                 "unused-import",
@@ -3137,6 +3152,7 @@ if call(foo
                 TextSize::from(40),
             ))))
             .noqa_offset(TextSize::from(35))
+            .documentation_url("https://docs.astral.sh/ruff/rules/unused-import")
             .build(),
             env.builder(
                 "unused-variable",
@@ -3151,6 +3167,7 @@ if call(foo
                 TextSize::from(104),
             ))))
             .noqa_offset(TextSize::from(98))
+            .documentation_url("https://docs.astral.sh/ruff/rules/unused-variable")
             .build(),
         ];
 

crates/ruff_db/src/diagnostic/render/concise.rs

@@ -1,6 +1,6 @@
 use crate::diagnostic::{
     Diagnostic, DisplayDiagnosticConfig, Severity,
-    stylesheet::{DiagnosticStylesheet, fmt_styled},
+    stylesheet::{DiagnosticStylesheet, fmt_styled, fmt_with_hyperlink},
 };
 
 use super::FileResolver;
@@ -62,18 +62,29 @@ impl<'a> ConciseRenderer<'a> {
                 }
                 write!(f, "{sep} ")?;
             }
+
             if self.config.hide_severity {
                 if let Some(code) = diag.secondary_code() {
                     write!(
                         f,
                         "{code} ",
-                        code = fmt_styled(code, stylesheet.secondary_code)
+                        code = fmt_styled(
+                            fmt_with_hyperlink(&code, diag.documentation_url(), &stylesheet),
+                            stylesheet.secondary_code
+                        )
                     )?;
                 } else {
                     write!(
                         f,
                         "{id}: ",
-                        id = fmt_styled(diag.inner.id.as_str(), stylesheet.secondary_code)
+                        id = fmt_styled(
+                            fmt_with_hyperlink(
+                                &diag.inner.id,
+                                diag.documentation_url(),
+                                &stylesheet
+                            ),
+                            stylesheet.secondary_code
+                        )
                     )?;
                 }
                 if self.config.show_fix_status {
@@ -93,7 +104,10 @@ impl<'a> ConciseRenderer<'a> {
                     f,
                     "{severity}[{id}] ",
                     severity = fmt_styled(severity, severity_style),
-                    id = fmt_styled(diag.id(), stylesheet.emphasis)
+                    id = fmt_styled(
+                        fmt_with_hyperlink(&diag.id(), diag.documentation_url(), &stylesheet),
+                        stylesheet.emphasis
+                    )
                 )?;
             }
 

crates/ruff_db/src/diagnostic/render/full.rs

@@ -49,7 +49,8 @@ impl<'a> FullRenderer<'a> {
             .help(stylesheet.help)
             .line_no(stylesheet.line_no)
             .emphasis(stylesheet.emphasis)
-            .none(stylesheet.none);
+            .none(stylesheet.none)
+            .hyperlink(stylesheet.hyperlink);
 
         for diag in diagnostics {
             let resolved = Resolved::new(self.resolver, diag, self.config);
@@ -703,52 +704,7 @@ print()
         env.show_fix_status(true);
         env.fix_applicability(Applicability::DisplayOnly);
 
-        insta::assert_snapshot!(env.render_diagnostics(&diagnostics), @r"
-        error[unused-import][*]: `os` imported but unused
-         --> notebook.ipynb:cell 1:2:8
-          |
-        1 | # cell 1
-        2 | import os
-          |        ^^
-          |
-        help: Remove unused import: `os`
-         ::: cell 1
-        1 | # cell 1
-          - import os
-
-        error[unused-import][*]: `math` imported but unused
-         --> notebook.ipynb:cell 2:2:8
-          |
-        1 | # cell 2
-        2 | import math
-          |        ^^^^
-        3 |
-        4 | print('hello world')
-          |
-        help: Remove unused import: `math`
-         ::: cell 2
-        1 | # cell 2
-          - import math
-        2 | 
-        3 | print('hello world')
-
-        error[unused-variable][*]: Local variable `x` is assigned to but never used
-         --> notebook.ipynb:cell 3:4:5
-          |
-        2 | def foo():
-        3 |     print()
-        4 |     x = 1
-          |     ^
-          |
-        help: Remove assignment to unused variable `x`
-         ::: cell 3
-        1 | # cell 3
-        2 | def foo():
-        3 |     print()
-          -     x = 1
-        4 | 
-        note: This is an unsafe fix and may change runtime behavior
-        ");
+        insta::assert_snapshot!(env.render_diagnostics(&diagnostics));
     }
 
     #[test]
@@ -768,31 +724,7 @@ print()
         }
         *fix = Fix::unsafe_edits(edits.remove(0), edits);
 
-        insta::assert_snapshot!(env.render(&diagnostic), @r"
-        error[unused-import][*]: `os` imported but unused
-         --> notebook.ipynb:cell 1:2:8
-          |
-        1 | # cell 1
-        2 | import os
-          |        ^^
-          |
-        help: Remove unused import: `os`
-         ::: cell 1
-        1 | # cell 1
-          - import os
-         ::: cell 2
-        1 | # cell 2
-          - import math
-        2 | 
-        3 | print('hello world')
-         ::: cell 3
-        1 | # cell 3
-        2 | def foo():
-        3 |     print()
-          -     x = 1
-        4 | 
-        note: This is an unsafe fix and may change runtime behavior
-        ");
+        insta::assert_snapshot!(env.render(&diagnostic));
     }
 
     /// Carriage return (`\r`) is a valid line-ending in Python, so we should normalize this to a

crates/ruff_db/src/diagnostic/render/json.rs

@@ -100,7 +100,7 @@ pub(super) fn diagnostic_to_json<'a>(
     if config.preview {
         JsonDiagnostic {
             code: diagnostic.secondary_code_or_id(),
-            url: diagnostic.to_ruff_url(),
+            url: diagnostic.documentation_url(),
             message: diagnostic.body(),
             fix,
             cell: notebook_cell_index,
@@ -112,7 +112,7 @@ pub(super) fn diagnostic_to_json<'a>(
     } else {
         JsonDiagnostic {
             code: diagnostic.secondary_code_or_id(),
-            url: diagnostic.to_ruff_url(),
+            url: diagnostic.documentation_url(),
             message: diagnostic.body(),
             fix,
             cell: notebook_cell_index,
@@ -228,7 +228,7 @@ pub(crate) struct JsonDiagnostic<'a> {
     location: Option<JsonLocation>,
     message: &'a str,
     noqa_row: Option<OneIndexed>,
-    url: Option<String>,
+    url: Option<&'a str>,
 }
 
 #[derive(Serialize)]
@@ -294,7 +294,10 @@ mod tests {
         env.format(DiagnosticFormat::Json);
         env.preview(false);
 
-        let diag = env.err().build();
+        let diag = env
+            .err()
+            .documentation_url("https://docs.astral.sh/ruff/rules/test-diagnostic")
+            .build();
 
         insta::assert_snapshot!(
             env.render(&diag),
@@ -328,7 +331,10 @@ mod tests {
         env.format(DiagnosticFormat::Json);
         env.preview(true);
 
-        let diag = env.err().build();
+        let diag = env
+            .err()
+            .documentation_url("https://docs.astral.sh/ruff/rules/test-diagnostic")
+            .build();
 
         insta::assert_snapshot!(
             env.render(&diag),

crates/ruff_db/src/diagnostic/render/rdjson.rs

@@ -82,7 +82,7 @@ fn diagnostic_to_rdjson<'a>(
             value: diagnostic
                 .secondary_code()
                 .map_or_else(|| diagnostic.name(), |code| code.as_str()),
-            url: diagnostic.to_ruff_url(),
+            url: diagnostic.documentation_url(),
         },
         suggestions: rdjson_suggestions(
             edits,
@@ -182,7 +182,7 @@ impl RdjsonRange {
 #[derive(Serialize)]
 struct RdjsonCode<'a> {
     #[serde(skip_serializing_if = "Option::is_none")]
-    url: Option<String>,
+    url: Option<&'a str>,
     value: &'a str,
 }
 
@@ -217,7 +217,10 @@ mod tests {
         env.format(DiagnosticFormat::Rdjson);
         env.preview(false);
 
-        let diag = env.err().build();
+        let diag = env
+            .err()
+            .documentation_url("https://docs.astral.sh/ruff/rules/test-diagnostic")
+            .build();
 
         insta::assert_snapshot!(env.render(&diag));
     }
@@ -228,7 +231,10 @@ mod tests {
         env.format(DiagnosticFormat::Rdjson);
         env.preview(true);
 
-        let diag = env.err().build();
+        let diag = env
+            .err()
+            .documentation_url("https://docs.astral.sh/ruff/rules/test-diagnostic")
+            .build();
 
         insta::assert_snapshot!(env.render(&diag));
     }

crates/ruff_db/src/diagnostic/render/snapshots/ruff_db__diagnostic__render__full__tests__notebook_output_with_diff.snap

@@ -0,0 +1,48 @@
+---
+source: crates/ruff_db/src/diagnostic/render/full.rs
+expression: env.render_diagnostics(&diagnostics)
+---
+error[unused-import][*]: `os` imported but unused
+ --> notebook.ipynb:cell 1:2:8
+  |
+1 | # cell 1
+2 | import os
+  |        ^^
+  |
+help: Remove unused import: `os`
+ ::: cell 1
+1 | # cell 1
+  - import os
+
+error[unused-import][*]: `math` imported but unused
+ --> notebook.ipynb:cell 2:2:8
+  |
+1 | # cell 2
+2 | import math
+  |        ^^^^
+3 |
+4 | print('hello world')
+  |
+help: Remove unused import: `math`
+ ::: cell 2
+1 | # cell 2
+  - import math
+2 | 
+3 | print('hello world')
+
+error[unused-variable][*]: Local variable `x` is assigned to but never used
+ --> notebook.ipynb:cell 3:4:5
+  |
+2 | def foo():
+3 |     print()
+4 |     x = 1
+  |     ^
+  |
+help: Remove assignment to unused variable `x`
+ ::: cell 3
+1 | # cell 3
+2 | def foo():
+3 |     print()
+  -     x = 1
+4 | 
+note: This is an unsafe fix and may change runtime behavior

crates/ruff_db/src/diagnostic/render/snapshots/ruff_db__diagnostic__render__full__tests__notebook_output_with_diff_spanning_cells.snap

@@ -0,0 +1,27 @@
+---
+source: crates/ruff_db/src/diagnostic/render/full.rs
+expression: env.render(&diagnostic)
+---
+error[unused-import][*]: `os` imported but unused
+ --> notebook.ipynb:cell 1:2:8
+  |
+1 | # cell 1
+2 | import os
+  |        ^^
+  |
+help: Remove unused import: `os`
+ ::: cell 1
+1 | # cell 1
+  - import os
+ ::: cell 2
+1 | # cell 2
+  - import math
+2 | 
+3 | print('hello world')
+ ::: cell 3
+1 | # cell 3
+2 | def foo():
+3 |     print()
+  -     x = 1
+4 | 
+note: This is an unsafe fix and may change runtime behavior

crates/ruff_db/src/diagnostic/stylesheet.rs

@@ -31,6 +31,43 @@ where
     FmtStyled { content, style }
 }
 
+pub(super) fn fmt_with_hyperlink<'a, T>(
+    content: T,
+    url: Option<&'a str>,
+    stylesheet: &DiagnosticStylesheet,
+) -> impl std::fmt::Display + 'a
+where
+    T: std::fmt::Display + 'a,
+{
+    struct FmtHyperlink<'a, T> {
+        content: T,
+        url: Option<&'a str>,
+    }
+
+    impl<T> std::fmt::Display for FmtHyperlink<'_, T>
+    where
+        T: std::fmt::Display,
+    {
+        fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+            if let Some(url) = self.url {
+                write!(f, "\x1B]8;;{url}\x1B\\")?;
+            }
+
+            self.content.fmt(f)?;
+
+            if self.url.is_some() {
+                f.write_str("\x1B]8;;\x1B\\")?;
+            }
+
+            Ok(())
+        }
+    }
+
+    let url = if stylesheet.hyperlink { url } else { None };
+
+    FmtHyperlink { content, url }
+}
+
 #[derive(Clone, Debug)]
 pub struct DiagnosticStylesheet {
     pub(crate) error: Style,
@@ -47,6 +84,7 @@ pub struct DiagnosticStylesheet {
     pub(crate) deletion: Style,
     pub(crate) insertion_line_no: Style,
     pub(crate) deletion_line_no: Style,
+    pub(crate) hyperlink: bool,
 }
 
 impl Default for DiagnosticStylesheet {
@@ -59,6 +97,8 @@ impl DiagnosticStylesheet {
     /// Default terminal styling
     pub fn styled() -> Self {
         let bright_blue = AnsiColor::BrightBlue.on_default();
+
+        let hyperlink = supports_hyperlinks::supports_hyperlinks();
         Self {
             error: AnsiColor::BrightRed.on_default().effects(Effects::BOLD),
             warning: AnsiColor::Yellow.on_default().effects(Effects::BOLD),
@@ -74,6 +114,7 @@ impl DiagnosticStylesheet {
             deletion: AnsiColor::Red.on_default(),
             insertion_line_no: AnsiColor::Green.on_default().effects(Effects::BOLD),
             deletion_line_no: AnsiColor::Red.on_default().effects(Effects::BOLD),
+            hyperlink,
         }
     }
 
@@ -93,6 +134,7 @@ impl DiagnosticStylesheet {
             deletion: Style::new(),
             insertion_line_no: Style::new(),
             deletion_line_no: Style::new(),
+            hyperlink: false,
         }
     }
 }

crates/ruff_linter/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ruff_linter"
-version = "0.14.5"
+version = "0.14.6"
 publish = false
 authors = { workspace = true }
 edition = { workspace = true }

crates/ruff_linter/resources/test/fixtures/flake8_bandit/S508.py

@@ -4,3 +4,31 @@ CommunityData("public", mpModel=0)  # S508
 CommunityData("public", mpModel=1)  # S508
 
 CommunityData("public", mpModel=2)  # OK
+
+# New API paths
+import pysnmp.hlapi.asyncio
+import pysnmp.hlapi.v1arch
+import pysnmp.hlapi.v1arch.asyncio
+import pysnmp.hlapi.v1arch.asyncio.auth
+import pysnmp.hlapi.v3arch
+import pysnmp.hlapi.v3arch.asyncio
+import pysnmp.hlapi.v3arch.asyncio.auth
+import pysnmp.hlapi.auth
+
+pysnmp.hlapi.asyncio.CommunityData("public", mpModel=0)  # S508
+pysnmp.hlapi.v1arch.asyncio.auth.CommunityData("public", mpModel=0)  # S508
+pysnmp.hlapi.v1arch.asyncio.CommunityData("public", mpModel=0)  # S508
+pysnmp.hlapi.v1arch.CommunityData("public", mpModel=0)  # S508
+pysnmp.hlapi.v3arch.asyncio.auth.CommunityData("public", mpModel=0)  # S508
+pysnmp.hlapi.v3arch.asyncio.CommunityData("public", mpModel=0)  # S508
+pysnmp.hlapi.v3arch.CommunityData("public", mpModel=0)  # S508
+pysnmp.hlapi.auth.CommunityData("public", mpModel=0)  # S508
+
+pysnmp.hlapi.asyncio.CommunityData("public", mpModel=2)  # OK
+pysnmp.hlapi.v1arch.asyncio.auth.CommunityData("public", mpModel=2)  # OK
+pysnmp.hlapi.v1arch.asyncio.CommunityData("public", mpModel=2)  # OK
+pysnmp.hlapi.v1arch.CommunityData("public", mpModel=2)  # OK
+pysnmp.hlapi.v3arch.asyncio.auth.CommunityData("public", mpModel=2)  # OK
+pysnmp.hlapi.v3arch.asyncio.CommunityData("public", mpModel=2)  # OK
+pysnmp.hlapi.v3arch.CommunityData("public", mpModel=2)  # OK
+pysnmp.hlapi.auth.CommunityData("public", mpModel=2)  # OK

crates/ruff_linter/resources/test/fixtures/flake8_bandit/S509.py

@@ -5,3 +5,19 @@ insecure = UsmUserData("securityName")  # S509
 auth_no_priv = UsmUserData("securityName", "authName")  # S509
 
 less_insecure = UsmUserData("securityName", "authName", "privName")  # OK
+
+# New API paths
+import pysnmp.hlapi.asyncio
+import pysnmp.hlapi.v3arch.asyncio
+import pysnmp.hlapi.v3arch.asyncio.auth
+import pysnmp.hlapi.auth
+
+pysnmp.hlapi.asyncio.UsmUserData("user")  # S509
+pysnmp.hlapi.v3arch.asyncio.UsmUserData("user")  # S509
+pysnmp.hlapi.v3arch.asyncio.auth.UsmUserData("user")  # S509
+pysnmp.hlapi.auth.UsmUserData("user")  # S509
+
+pysnmp.hlapi.asyncio.UsmUserData("user", "authkey", "privkey")  # OK
+pysnmp.hlapi.v3arch.asyncio.UsmUserData("user", "authkey", "privkey")  # OK
+pysnmp.hlapi.v3arch.asyncio.auth.UsmUserData("user", "authkey", "privkey")  # OK
+pysnmp.hlapi.auth.UsmUserData("user", "authkey", "privkey")  # OK

crates/ruff_linter/resources/test/fixtures/flake8_implicit_str_concat/ISC.py

@@ -208,3 +208,17 @@ _ = t"b {f"c" f"d {t"e" t"f"} g"} h"
 _ = f"b {t"abc" \
     t"def"} g"
 
+
+# Explicit concatenation with either operand being
+# a string literal that wraps across multiple lines (in parentheses)
+# reports diagnostic - no autofix.
+# See https://github.com/astral-sh/ruff/issues/19757
+_ = "abc" + (
+    "def"
+    "ghi"
+)
+
+_ = (
+    "abc"
+    "def"
+) + "ghi"

crates/ruff_linter/resources/test/fixtures/pylint/dict_iter_missing_items.py

@@ -30,3 +30,23 @@ for a, b in d_tuple:
     pass
 for a, b in d_tuple_annotated: 
     pass
+
+# Empty dict cases
+empty_dict = {}
+empty_dict["x"] = 1
+for k, v in empty_dict:
+    pass
+
+empty_dict_annotated_tuple_keys: dict[tuple[int, str], bool] = {}
+for k, v in empty_dict_annotated_tuple_keys:
+    pass
+
+empty_dict_unannotated = {}
+empty_dict_unannotated[("x", "y")] = True
+for k, v in empty_dict_unannotated:
+    pass
+
+empty_dict_annotated_str_keys: dict[str, int] = {}
+empty_dict_annotated_str_keys["x"] = 1
+for k, v in empty_dict_annotated_str_keys:
+    pass

crates/ruff_linter/resources/test/fixtures/pylint/stop_iteration_return.py

@@ -129,3 +129,26 @@ def generator_with_lambda():
     yield 1
     func = lambda x: x  # Just a regular lambda
     yield 2
+
+# See: https://github.com/astral-sh/ruff/issues/21162
+def foo():
+    def g():
+        yield 1
+    raise StopIteration  # Should not trigger
+
+
+def foo():
+    def g():
+        raise StopIteration  # Should not trigger
+    yield 1
+
+# https://github.com/astral-sh/ruff/pull/21177#pullrequestreview-3430209718
+def foo():
+    yield 1
+    class C:
+        raise StopIteration  # Should trigger
+    yield C
+
+# https://github.com/astral-sh/ruff/pull/21177#discussion_r2539702728
+def foo():
+    raise StopIteration((yield 1))  # Should trigger

crates/ruff_linter/resources/test/fixtures/ruff/RUF052_1.py

@@ -0,0 +1,109 @@
+# Correct usage in loop and comprehension
+def process_data():
+    return 42
+def test_correct_dummy_usage():
+    my_list = [{"foo": 1}, {"foo": 2}]
+
+    # Should NOT detect - dummy variable is not used
+    [process_data() for _ in my_list]  # OK: `_` is ignored by rule
+
+    # Should NOT detect - dummy variable is not used
+    [item["foo"] for item in my_list]  # OK: not a dummy variable name
+
+    # Should NOT detect - dummy variable is not used
+    [42 for _unused in my_list]  # OK: `_unused` is not accessed
+
+# Regular For Loops
+def test_for_loops():
+    my_list = [{"foo": 1}, {"foo": 2}]
+
+    # Should detect used dummy variable
+    for _item in my_list:
+        print(_item["foo"])  # RUF052: Local dummy variable `_item` is accessed
+
+    # Should detect used dummy variable
+    for _index, _value in enumerate(my_list):
+        result = _index + _value["foo"]  # RUF052: Both `_index` and `_value` are accessed
+
+# List Comprehensions
+def test_list_comprehensions():
+    my_list = [{"foo": 1}, {"foo": 2}]
+
+    # Should detect used dummy variable
+    result = [_item["foo"] for _item in my_list]  # RUF052: Local dummy variable `_item` is accessed
+
+    # Should detect used dummy variable in nested comprehension
+    nested = [[_item["foo"] for _item in _sublist] for _sublist in [my_list, my_list]]
+    # RUF052: Both `_item` and `_sublist` are accessed
+
+    # Should detect with conditions
+    filtered = [_item["foo"] for _item in my_list if _item["foo"] > 0]
+    # RUF052: Local dummy variable `_item` is accessed
+
+# Dict Comprehensions
+def test_dict_comprehensions():
+    my_list = [{"key": "a", "value": 1}, {"key": "b", "value": 2}]
+
+    # Should detect used dummy variable
+    result = {_item["key"]: _item["value"] for _item in my_list}
+    # RUF052: Local dummy variable `_item` is accessed
+
+    # Should detect with enumerate
+    indexed = {_index: _item["value"] for _index, _item in enumerate(my_list)}
+    # RUF052: Both `_index` and `_item` are accessed
+
+    # Should detect in nested dict comprehension
+    nested = {_outer: {_inner["key"]: _inner["value"] for _inner in sublist}
+              for _outer, sublist in enumerate([my_list])}
+    # RUF052: `_outer`, `_inner` are accessed
+
+# Set Comprehensions
+def test_set_comprehensions():
+    my_list = [{"foo": 1}, {"foo": 2}, {"foo": 1}]  # Note: duplicate values
+
+    # Should detect used dummy variable
+    unique_values = {_item["foo"] for _item in my_list}
+    # RUF052: Local dummy variable `_item` is accessed
+
+    # Should detect with conditions
+    filtered_set = {_item["foo"] for _item in my_list if _item["foo"] > 0}
+    # RUF052: Local dummy variable `_item` is accessed
+
+    # Should detect with complex expression
+    processed = {_item["foo"] * 2 for _item in my_list}
+    # RUF052: Local dummy variable `_item` is accessed
+
+# Generator Expressions
+def test_generator_expressions():
+    my_list = [{"foo": 1}, {"foo": 2}]
+
+    # Should detect used dummy variable
+    gen = (_item["foo"] for _item in my_list)
+    # RUF052: Local dummy variable `_item` is accessed
+
+    # Should detect when passed to function
+    total = sum(_item["foo"] for _item in my_list)
+    # RUF052: Local dummy variable `_item` is accessed
+
+    # Should detect with multiple generators
+    pairs = ((_x, _y) for _x in range(3) for _y in range(3) if _x != _y)
+    # RUF052: Both `_x` and `_y` are accessed
+
+    # Should detect in nested generator
+    nested_gen = (sum(_inner["foo"] for _inner in sublist) for _sublist in [my_list] for sublist in _sublist)
+    # RUF052: `_inner` and `_sublist` are accessed
+
+# Complex Examples with Multiple Comprehension Types
+def test_mixed_comprehensions():
+    data = [{"items": [1, 2, 3]}, {"items": [4, 5, 6]}]
+
+    # Should detect in mixed comprehensions
+    result = [
+        {_key: [_val * 2 for _val in _record["items"]] for _key in ["doubled"]}
+        for _record in data
+    ]
+    # RUF052: `_key`, `_val`, and `_record` are all accessed
+
+    # Should detect in generator passed to list constructor
+    gen_list = list(_item["items"][0] for _item in data)
+    # RUF052: Local dummy variable `_item` is accessed

crates/ruff_linter/resources/test/fixtures/ruff/RUF065_1.py

@@ -16,3 +16,19 @@ logging.warning("%s", str(**{"object": b"\xf0\x9f\x9a\xa8", "encoding": "utf-8"}
 # str() with single keyword argument - should be flagged (equivalent to str("!"))
 logging.warning("%s", str(object="!"))
 
+
+# Complex conversion specifiers that make oct() and hex() necessary
+# These should NOT be flagged because the behavior differs between %s and %#o/%#x
+# https://github.com/astral-sh/ruff/issues/21458
+
+# %06s with oct() - zero-pad flag with width (should NOT be flagged)
+logging.warning("%06s", oct(123))
+
+# % s with oct() - blank sign flag (should NOT be flagged)
+logging.warning("% s", oct(123))
+
+# %+s with oct() - sign char flag (should NOT be flagged)
+logging.warning("%+s", oct(123))
+
+# %.3s with hex() - precision (should NOT be flagged)
+logging.warning("%.3s", hex(123))

crates/ruff_linter/src/checkers/ast/analyze/statement.rs

@@ -131,6 +131,9 @@ pub(crate) fn statement(stmt: &Stmt, checker: &mut Checker) {
             if checker.is_rule_enabled(Rule::GeneratorReturnFromIterMethod) {
                 flake8_pyi::rules::bad_generator_return_type(function_def, checker);
             }
+            if checker.is_rule_enabled(Rule::StopIterationReturn) {
+                pylint::rules::stop_iteration_return(checker, function_def);
+            }
             if checker.source_type.is_stub() {
                 if checker.is_rule_enabled(Rule::StrOrReprDefinedInStub) {
                     flake8_pyi::rules::str_or_repr_defined_in_stub(checker, stmt);
@@ -950,9 +953,6 @@ pub(crate) fn statement(stmt: &Stmt, checker: &mut Checker) {
             if checker.is_rule_enabled(Rule::MisplacedBareRaise) {
                 pylint::rules::misplaced_bare_raise(checker, raise);
             }
-            if checker.is_rule_enabled(Rule::StopIterationReturn) {
-                pylint::rules::stop_iteration_return(checker, raise);
-            }
         }
         Stmt::AugAssign(aug_assign @ ast::StmtAugAssign { target, .. }) => {
             if checker.is_rule_enabled(Rule::GlobalStatement) {

crates/ruff_linter/src/message/mod.rs

@@ -125,6 +125,7 @@ where
     }
 
     diagnostic.set_secondary_code(SecondaryCode::new(rule.noqa_code().to_string()));
+    diagnostic.set_documentation_url(rule.url());
 
     diagnostic
 }

crates/ruff_linter/src/preview.rs

@@ -270,6 +270,11 @@ pub(crate) const fn is_extended_i18n_function_matching_enabled(settings: &Linter
     settings.preview.is_enabled()
 }
 
+// https://github.com/astral-sh/ruff/pull/21374
+pub(crate) const fn is_extended_snmp_api_path_detection_enabled(settings: &LinterSettings) -> bool {
+    settings.preview.is_enabled()
+}
+
 // https://github.com/astral-sh/ruff/pull/21395
 pub(crate) const fn is_enumerate_for_loop_int_index_enabled(settings: &LinterSettings) -> bool {
     settings.preview.is_enabled()

crates/ruff_linter/src/rules/flake8_bandit/mod.rs

@@ -104,6 +104,8 @@ mod tests {
     #[test_case(Rule::SuspiciousURLOpenUsage, Path::new("S310.py"))]
     #[test_case(Rule::SuspiciousNonCryptographicRandomUsage, Path::new("S311.py"))]
     #[test_case(Rule::SuspiciousTelnetUsage, Path::new("S312.py"))]
+    #[test_case(Rule::SnmpInsecureVersion, Path::new("S508.py"))]
+    #[test_case(Rule::SnmpWeakCryptography, Path::new("S509.py"))]
     fn preview_rules(rule_code: Rule, path: &Path) -> Result<()> {
         let snapshot = format!(
             "preview__{}_{}",

crates/ruff_linter/src/rules/flake8_bandit/rules/snmp_insecure_version.rs

@@ -4,6 +4,7 @@ use ruff_text_size::Ranged;
 
 use crate::Violation;
 use crate::checkers::ast::Checker;
+use crate::preview::is_extended_snmp_api_path_detection_enabled;
 
 /// ## What it does
 /// Checks for uses of SNMPv1 or SNMPv2.
@@ -47,10 +48,17 @@ pub(crate) fn snmp_insecure_version(checker: &Checker, call: &ast::ExprCall) {
         .semantic()
         .resolve_qualified_name(&call.func)
         .is_some_and(|qualified_name| {
-            matches!(
-                qualified_name.segments(),
-                ["pysnmp", "hlapi", "CommunityData"]
-            )
+            if is_extended_snmp_api_path_detection_enabled(checker.settings()) {
+                matches!(
+                    qualified_name.segments(),
+                    ["pysnmp", "hlapi", .., "CommunityData"]
+                )
+            } else {
+                matches!(
+                    qualified_name.segments(),
+                    ["pysnmp", "hlapi", "CommunityData"]
+                )
+            }
         })
     {
         if let Some(keyword) = call.arguments.find_keyword("mpModel") {

crates/ruff_linter/src/rules/flake8_bandit/rules/snmp_weak_cryptography.rs

@@ -4,6 +4,7 @@ use ruff_text_size::Ranged;
 
 use crate::Violation;
 use crate::checkers::ast::Checker;
+use crate::preview::is_extended_snmp_api_path_detection_enabled;
 
 /// ## What it does
 /// Checks for uses of the SNMPv3 protocol without encryption.
@@ -47,10 +48,17 @@ pub(crate) fn snmp_weak_cryptography(checker: &Checker, call: &ast::ExprCall) {
             .semantic()
             .resolve_qualified_name(&call.func)
             .is_some_and(|qualified_name| {
-                matches!(
-                    qualified_name.segments(),
-                    ["pysnmp", "hlapi", "UsmUserData"]
-                )
+                if is_extended_snmp_api_path_detection_enabled(checker.settings()) {
+                    matches!(
+                        qualified_name.segments(),
+                        ["pysnmp", "hlapi", .., "UsmUserData"]
+                    )
+                } else {
+                    matches!(
+                        qualified_name.segments(),
+                        ["pysnmp", "hlapi", "UsmUserData"]
+                    )
+                }
             })
         {
             checker.report_diagnostic(SnmpWeakCryptography, call.func.range());

crates/ruff_linter/src/rules/flake8_bandit/snapshots/ruff_linter__rules__flake8_bandit__tests__preview__S508_S508.py.snap

@@ -0,0 +1,108 @@
+---
+source: crates/ruff_linter/src/rules/flake8_bandit/mod.rs
+---
+S508 The use of SNMPv1 and SNMPv2 is insecure. Use SNMPv3 if able.
+ --> S508.py:3:25
+  |
+1 | from pysnmp.hlapi import CommunityData
+2 |
+3 | CommunityData("public", mpModel=0)  # S508
+  |                         ^^^^^^^^^
+4 | CommunityData("public", mpModel=1)  # S508
+  |
+
+S508 The use of SNMPv1 and SNMPv2 is insecure. Use SNMPv3 if able.
+ --> S508.py:4:25
+  |
+3 | CommunityData("public", mpModel=0)  # S508
+4 | CommunityData("public", mpModel=1)  # S508
+  |                         ^^^^^^^^^
+5 |
+6 | CommunityData("public", mpModel=2)  # OK
+  |
+
+S508 The use of SNMPv1 and SNMPv2 is insecure. Use SNMPv3 if able.
+  --> S508.py:18:46
+   |
+16 | import pysnmp.hlapi.auth
+17 |
+18 | pysnmp.hlapi.asyncio.CommunityData("public", mpModel=0)  # S508
+   |                                              ^^^^^^^^^
+19 | pysnmp.hlapi.v1arch.asyncio.auth.CommunityData("public", mpModel=0)  # S508
+20 | pysnmp.hlapi.v1arch.asyncio.CommunityData("public", mpModel=0)  # S508
+   |
+
+S508 The use of SNMPv1 and SNMPv2 is insecure. Use SNMPv3 if able.
+  --> S508.py:19:58
+   |
+18 | pysnmp.hlapi.asyncio.CommunityData("public", mpModel=0)  # S508
+19 | pysnmp.hlapi.v1arch.asyncio.auth.CommunityData("public", mpModel=0)  # S508
+   |                                                          ^^^^^^^^^
+20 | pysnmp.hlapi.v1arch.asyncio.CommunityData("public", mpModel=0)  # S508
+21 | pysnmp.hlapi.v1arch.CommunityData("public", mpModel=0)  # S508
+   |
+
+S508 The use of SNMPv1 and SNMPv2 is insecure. Use SNMPv3 if able.
+  --> S508.py:20:53
+   |
+18 | pysnmp.hlapi.asyncio.CommunityData("public", mpModel=0)  # S508
+19 | pysnmp.hlapi.v1arch.asyncio.auth.CommunityData("public", mpModel=0)  # S508
+20 | pysnmp.hlapi.v1arch.asyncio.CommunityData("public", mpModel=0)  # S508
+   |                                                     ^^^^^^^^^
+21 | pysnmp.hlapi.v1arch.CommunityData("public", mpModel=0)  # S508
+22 | pysnmp.hlapi.v3arch.asyncio.auth.CommunityData("public", mpModel=0)  # S508
+   |
+
+S508 The use of SNMPv1 and SNMPv2 is insecure. Use SNMPv3 if able.
+  --> S508.py:21:45
+   |
+19 | pysnmp.hlapi.v1arch.asyncio.auth.CommunityData("public", mpModel=0)  # S508
+20 | pysnmp.hlapi.v1arch.asyncio.CommunityData("public", mpModel=0)  # S508
+21 | pysnmp.hlapi.v1arch.CommunityData("public", mpModel=0)  # S508
+   |                                             ^^^^^^^^^
+22 | pysnmp.hlapi.v3arch.asyncio.auth.CommunityData("public", mpModel=0)  # S508
+23 | pysnmp.hlapi.v3arch.asyncio.CommunityData("public", mpModel=0)  # S508
+   |
+
+S508 The use of SNMPv1 and SNMPv2 is insecure. Use SNMPv3 if able.
+  --> S508.py:22:58
+   |
+20 | pysnmp.hlapi.v1arch.asyncio.CommunityData("public", mpModel=0)  # S508
+21 | pysnmp.hlapi.v1arch.CommunityData("public", mpModel=0)  # S508
+22 | pysnmp.hlapi.v3arch.asyncio.auth.CommunityData("public", mpModel=0)  # S508
+   |                                                          ^^^^^^^^^
+23 | pysnmp.hlapi.v3arch.asyncio.CommunityData("public", mpModel=0)  # S508
+24 | pysnmp.hlapi.v3arch.CommunityData("public", mpModel=0)  # S508
+   |
+
+S508 The use of SNMPv1 and SNMPv2 is insecure. Use SNMPv3 if able.
+  --> S508.py:23:53
+   |
+21 | pysnmp.hlapi.v1arch.CommunityData("public", mpModel=0)  # S508
+22 | pysnmp.hlapi.v3arch.asyncio.auth.CommunityData("public", mpModel=0)  # S508
+23 | pysnmp.hlapi.v3arch.asyncio.CommunityData("public", mpModel=0)  # S508
+   |                                                     ^^^^^^^^^
+24 | pysnmp.hlapi.v3arch.CommunityData("public", mpModel=0)  # S508
+25 | pysnmp.hlapi.auth.CommunityData("public", mpModel=0)  # S508
+   |
+
+S508 The use of SNMPv1 and SNMPv2 is insecure. Use SNMPv3 if able.
+  --> S508.py:24:45
+   |
+22 | pysnmp.hlapi.v3arch.asyncio.auth.CommunityData("public", mpModel=0)  # S508
+23 | pysnmp.hlapi.v3arch.asyncio.CommunityData("public", mpModel=0)  # S508
+24 | pysnmp.hlapi.v3arch.CommunityData("public", mpModel=0)  # S508
+   |                                             ^^^^^^^^^
+25 | pysnmp.hlapi.auth.CommunityData("public", mpModel=0)  # S508
+   |
+
+S508 The use of SNMPv1 and SNMPv2 is insecure. Use SNMPv3 if able.
+  --> S508.py:25:43
+   |
+23 | pysnmp.hlapi.v3arch.asyncio.CommunityData("public", mpModel=0)  # S508
+24 | pysnmp.hlapi.v3arch.CommunityData("public", mpModel=0)  # S508
+25 | pysnmp.hlapi.auth.CommunityData("public", mpModel=0)  # S508
+   |                                           ^^^^^^^^^
+26 |
+27 | pysnmp.hlapi.asyncio.CommunityData("public", mpModel=2)  # OK
+   |

crates/ruff_linter/src/rules/flake8_bandit/snapshots/ruff_linter__rules__flake8_bandit__tests__preview__S509_S509.py.snap

@@ -0,0 +1,62 @@
+---
+source: crates/ruff_linter/src/rules/flake8_bandit/mod.rs
+---
+S509 You should not use SNMPv3 without encryption. `noAuthNoPriv` & `authNoPriv` is insecure.
+ --> S509.py:4:12
+  |
+4 | insecure = UsmUserData("securityName")  # S509
+  |            ^^^^^^^^^^^
+5 | auth_no_priv = UsmUserData("securityName", "authName")  # S509
+  |
+
+S509 You should not use SNMPv3 without encryption. `noAuthNoPriv` & `authNoPriv` is insecure.
+ --> S509.py:5:16
+  |
+4 | insecure = UsmUserData("securityName")  # S509
+5 | auth_no_priv = UsmUserData("securityName", "authName")  # S509
+  |                ^^^^^^^^^^^
+6 |
+7 | less_insecure = UsmUserData("securityName", "authName", "privName")  # OK
+  |
+
+S509 You should not use SNMPv3 without encryption. `noAuthNoPriv` & `authNoPriv` is insecure.
+  --> S509.py:15:1
+   |
+13 | import pysnmp.hlapi.auth
+14 |
+15 | pysnmp.hlapi.asyncio.UsmUserData("user")  # S509
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+16 | pysnmp.hlapi.v3arch.asyncio.UsmUserData("user")  # S509
+17 | pysnmp.hlapi.v3arch.asyncio.auth.UsmUserData("user")  # S509
+   |
+
+S509 You should not use SNMPv3 without encryption. `noAuthNoPriv` & `authNoPriv` is insecure.
+  --> S509.py:16:1
+   |
+15 | pysnmp.hlapi.asyncio.UsmUserData("user")  # S509
+16 | pysnmp.hlapi.v3arch.asyncio.UsmUserData("user")  # S509
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+17 | pysnmp.hlapi.v3arch.asyncio.auth.UsmUserData("user")  # S509
+18 | pysnmp.hlapi.auth.UsmUserData("user")  # S509
+   |
+
+S509 You should not use SNMPv3 without encryption. `noAuthNoPriv` & `authNoPriv` is insecure.
+  --> S509.py:17:1
+   |
+15 | pysnmp.hlapi.asyncio.UsmUserData("user")  # S509
+16 | pysnmp.hlapi.v3arch.asyncio.UsmUserData("user")  # S509
+17 | pysnmp.hlapi.v3arch.asyncio.auth.UsmUserData("user")  # S509
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+18 | pysnmp.hlapi.auth.UsmUserData("user")  # S509
+   |
+
+S509 You should not use SNMPv3 without encryption. `noAuthNoPriv` & `authNoPriv` is insecure.
+  --> S509.py:18:1
+   |
+16 | pysnmp.hlapi.v3arch.asyncio.UsmUserData("user")  # S509
+17 | pysnmp.hlapi.v3arch.asyncio.auth.UsmUserData("user")  # S509
+18 | pysnmp.hlapi.auth.UsmUserData("user")  # S509
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+19 |
+20 | pysnmp.hlapi.asyncio.UsmUserData("user", "authkey", "privkey")  # OK
+   |

crates/ruff_linter/src/rules/flake8_implicit_str_concat/rules/explicit.rs

@@ -1,12 +1,12 @@
 use ruff_macros::{ViolationMetadata, derive_message_formats};
+use ruff_python_ast::parenthesize::parenthesized_range;
 use ruff_python_ast::{self as ast, Expr, Operator};
 use ruff_python_trivia::is_python_whitespace;
 use ruff_source_file::LineRanges;
 use ruff_text_size::{Ranged, TextLen, TextRange, TextSize};
 
-use crate::AlwaysFixableViolation;
 use crate::checkers::ast::Checker;
-use crate::{Edit, Fix};
+use crate::{Edit, Fix, FixAvailability, Violation};
 
 /// ## What it does
 /// Checks for string literals that are explicitly concatenated (using the
@@ -36,14 +36,16 @@ use crate::{Edit, Fix};
 #[violation_metadata(stable_since = "v0.0.201")]
 pub(crate) struct ExplicitStringConcatenation;
 
-impl AlwaysFixableViolation for ExplicitStringConcatenation {
+impl Violation for ExplicitStringConcatenation {
+    const FIX_AVAILABILITY: FixAvailability = FixAvailability::Sometimes;
+
     #[derive_message_formats]
     fn message(&self) -> String {
         "Explicitly concatenated string should be implicitly concatenated".to_string()
     }
 
-    fn fix_title(&self) -> String {
-        "Remove redundant '+' operator to implicitly concatenate".to_string()
+    fn fix_title(&self) -> Option<String> {
+        Some("Remove redundant '+' operator to implicitly concatenate".to_string())
     }
 }
 
@@ -82,9 +84,27 @@ pub(crate) fn explicit(checker: &Checker, expr: &Expr) {
                     .locator()
                     .contains_line_break(TextRange::new(left.end(), right.start()))
             {
-                checker
-                    .report_diagnostic(ExplicitStringConcatenation, expr.range())
-                    .set_fix(generate_fix(checker, bin_op));
+                let mut diagnostic =
+                    checker.report_diagnostic(ExplicitStringConcatenation, expr.range());
+
+                let is_parenthesized = |expr: &Expr| {
+                    parenthesized_range(
+                        expr.into(),
+                        bin_op.into(),
+                        checker.comment_ranges(),
+                        checker.source(),
+                    )
+                    .is_some()
+                };
+                // If either `left` or `right` is parenthesized, generating
+                // a fix would be too involved. Just report the diagnostic.
+                // Currently, attempting `generate_fix` would result in
+                // an invalid code. See: #19757
+                if is_parenthesized(left) || is_parenthesized(right) {
+                    return;
+                }
+
+                diagnostic.set_fix(generate_fix(checker, bin_op));
             }
         }
     }

crates/ruff_linter/src/rules/flake8_implicit_str_concat/snapshots/ruff_linter__rules__flake8_implicit_str_concat__tests__ISC003_ISC.py.snap

@@ -357,3 +357,33 @@ help: Remove redundant '+' operator to implicitly concatenate
 203 | )
 204 | 
 205 | # nested examples with both t and f-strings
+
+ISC003 Explicitly concatenated string should be implicitly concatenated
+   --> ISC.py:216:5
+    |
+214 |   # reports diagnostic - no autofix.
+215 |   # See https://github.com/astral-sh/ruff/issues/19757
+216 |   _ = "abc" + (
+    |  _____^
+217 | |     "def"
+218 | |     "ghi"
+219 | | )
+    | |_^
+220 |
+221 |   _ = (
+    |
+help: Remove redundant '+' operator to implicitly concatenate
+
+ISC003 Explicitly concatenated string should be implicitly concatenated
+   --> ISC.py:221:5
+    |
+219 |   )
+220 |
+221 |   _ = (
+    |  _____^
+222 | |     "abc"
+223 | |     "def"
+224 | | ) + "ghi"
+    | |_________^
+    |
+help: Remove redundant '+' operator to implicitly concatenate

crates/ruff_linter/src/rules/flake8_implicit_str_concat/snapshots/ruff_linter__rules__flake8_implicit_str_concat__tests__multiline_ISC002_ISC.py.snap

@@ -89,3 +89,24 @@ ISC002 Implicitly concatenated string literals over multiple lines
 209 | |     t"def"} g"
     | |__________^
     |
+
+ISC002 Implicitly concatenated string literals over multiple lines
+   --> ISC.py:217:5
+    |
+215 |   # See https://github.com/astral-sh/ruff/issues/19757
+216 |   _ = "abc" + (
+217 | /     "def"
+218 | |     "ghi"
+    | |_________^
+219 |   )
+    |
+
+ISC002 Implicitly concatenated string literals over multiple lines
+   --> ISC.py:222:5
+    |
+221 |   _ = (
+222 | /     "abc"
+223 | |     "def"
+    | |_________^
+224 |   ) + "ghi"
+    |

crates/ruff_linter/src/rules/pylint/rules/dict_iter_missing_items.rs

@@ -1,4 +1,4 @@
-use ruff_python_ast::{Expr, Stmt};
+use ruff_python_ast::{self as ast, Expr, Stmt};
 
 use ruff_macros::{ViolationMetadata, derive_message_formats};
 use ruff_python_semantic::analyze::typing::is_dict;
@@ -108,15 +108,77 @@ fn is_dict_key_tuple_with_two_elements(binding: &Binding, semantic: &SemanticMod
         return false;
     };
 
-    let Stmt::Assign(assign_stmt) = statement else {
+    let (value, annotation) = match statement {
+        Stmt::Assign(assign_stmt) => (assign_stmt.value.as_ref(), None),
+        Stmt::AnnAssign(ast::StmtAnnAssign {
+            value: Some(value),
+            annotation,
+            ..
+        }) => (value.as_ref(), Some(annotation.as_ref())),
+        _ => return false,
+    };
+
+    let Expr::Dict(dict_expr) = value else {
         return false;
     };
 
-    let Expr::Dict(dict_expr) = &*assign_stmt.value else {
-        return false;
-    };
+    // Check if dict is empty
+    let is_empty = dict_expr.is_empty();
 
+    if is_empty {
+        // For empty dicts, check type annotation
+        return annotation
+            .is_some_and(|annotation| is_annotation_dict_with_tuple_keys(annotation, semantic));
+    }
+
+    // For non-empty dicts, check if all keys are 2-tuples
     dict_expr
         .iter_keys()
         .all(|key| matches!(key, Some(Expr::Tuple(tuple)) if tuple.len() == 2))
 }
+
+/// Returns true if the annotation is `dict[tuple[T1, T2], ...]` where tuple has exactly 2 elements.
+fn is_annotation_dict_with_tuple_keys(annotation: &Expr, semantic: &SemanticModel) -> bool {
+    // Check if it's a subscript: dict[...]
+    let Expr::Subscript(subscript) = annotation else {
+        return false;
+    };
+
+    // Check if it's dict or typing.Dict
+    if !semantic.match_builtin_expr(subscript.value.as_ref(), "dict")
+        && !semantic.match_typing_expr(subscript.value.as_ref(), "Dict")
+    {
+        return false;
+    }
+
+    // Extract the slice (should be a tuple: (key_type, value_type))
+    let Expr::Tuple(tuple) = subscript.slice.as_ref() else {
+        return false;
+    };
+
+    // dict[K, V] format - check if K is tuple with 2 elements
+    if let [key, _value] = tuple.elts.as_slice() {
+        return is_tuple_type_with_two_elements(key, semantic);
+    }
+
+    false
+}
+
+/// Returns true if the expression represents a tuple type with exactly 2 elements.
+fn is_tuple_type_with_two_elements(expr: &Expr, semantic: &SemanticModel) -> bool {
+    // Handle tuple[...] subscript
+    if let Expr::Subscript(subscript) = expr {
+        // Check if it's tuple or typing.Tuple
+        if semantic.match_builtin_expr(subscript.value.as_ref(), "tuple")
+            || semantic.match_typing_expr(subscript.value.as_ref(), "Tuple")
+        {
+            // Check the slice - tuple[T1, T2]
+            if let Expr::Tuple(tuple_slice) = subscript.slice.as_ref() {
+                return tuple_slice.elts.len() == 2;
+            }
+            return false;
+        }
+    }
+
+    false
+}

crates/ruff_linter/src/rules/pylint/rules/stop_iteration_return.rs

@@ -1,6 +1,9 @@
 use ruff_macros::{ViolationMetadata, derive_message_formats};
-use ruff_python_ast as ast;
-use ruff_python_ast::visitor::{Visitor, walk_expr, walk_stmt};
+use ruff_python_ast::{
+    self as ast,
+    helpers::map_callable,
+    visitor::{Visitor, walk_expr, walk_stmt},
+};
 use ruff_text_size::Ranged;
 
 use crate::Violation;
@@ -50,65 +53,54 @@ impl Violation for StopIterationReturn {
 }
 
 /// PLR1708
-pub(crate) fn stop_iteration_return(checker: &Checker, raise_stmt: &ast::StmtRaise) {
-    // Fast-path: only continue if this is `raise StopIteration` (with or without args)
-    let Some(exc) = &raise_stmt.exc else {
-        return;
+pub(crate) fn stop_iteration_return(checker: &Checker, function_def: &ast::StmtFunctionDef) {
+    let mut analyzer = GeneratorAnalyzer {
+        checker,
+        has_yield: false,
+        stop_iteration_raises: Vec::new(),
     };
 
-    let is_stop_iteration = match exc.as_ref() {
-        ast::Expr::Call(ast::ExprCall { func, .. }) => {
-            checker.semantic().match_builtin_expr(func, "StopIteration")
+    analyzer.visit_body(&function_def.body);
+
+    if analyzer.has_yield {
+        for raise_stmt in analyzer.stop_iteration_raises {
+            checker.report_diagnostic(StopIterationReturn, raise_stmt.range());
         }
-        expr => checker.semantic().match_builtin_expr(expr, "StopIteration"),
-    };
-
-    if !is_stop_iteration {
-        return;
     }
-
-    // Now check the (more expensive) generator context
-    if !in_generator_context(checker) {
-        return;
-    }
-
-    checker.report_diagnostic(StopIterationReturn, raise_stmt.range());
 }
 
-/// Returns true if we're inside a function that contains any `yield`/`yield from`.
-fn in_generator_context(checker: &Checker) -> bool {
-    for scope in checker.semantic().current_scopes() {
-        if let ruff_python_semantic::ScopeKind::Function(function_def) = scope.kind {
-            if contains_yield_statement(&function_def.body) {
-                return true;
+struct GeneratorAnalyzer<'a, 'b> {
+    checker: &'a Checker<'b>,
+    has_yield: bool,
+    stop_iteration_raises: Vec<&'a ast::StmtRaise>,
+}
+
+impl<'a> Visitor<'a> for GeneratorAnalyzer<'a, '_> {
+    fn visit_stmt(&mut self, stmt: &'a ast::Stmt) {
+        match stmt {
+            ast::Stmt::FunctionDef(_) => {}
+            ast::Stmt::Raise(raise @ ast::StmtRaise { exc: Some(exc), .. }) => {
+                if self
+                    .checker
+                    .semantic()
+                    .match_builtin_expr(map_callable(exc), "StopIteration")
+                {
+                    self.stop_iteration_raises.push(raise);
+                }
+                walk_stmt(self, stmt);
             }
+            _ => walk_stmt(self, stmt),
         }
     }
-    false
-}
 
-/// Check if a statement list contains any yield statements
-fn contains_yield_statement(body: &[ast::Stmt]) -> bool {
-    struct YieldFinder {
-        found: bool,
-    }
-
-    impl Visitor<'_> for YieldFinder {
-        fn visit_expr(&mut self, expr: &ast::Expr) {
-            if matches!(expr, ast::Expr::Yield(_) | ast::Expr::YieldFrom(_)) {
-                self.found = true;
-            } else {
+    fn visit_expr(&mut self, expr: &'a ast::Expr) {
+        match expr {
+            ast::Expr::Lambda(_) => {}
+            ast::Expr::Yield(_) | ast::Expr::YieldFrom(_) => {
+                self.has_yield = true;
                 walk_expr(self, expr);
             }
+            _ => walk_expr(self, expr),
         }
     }
-
-    let mut finder = YieldFinder { found: false };
-    for stmt in body {
-        walk_stmt(&mut finder, stmt);
-        if finder.found {
-            return true;
-        }
-    }
-    false
 }

crates/ruff_linter/src/rules/pylint/snapshots/ruff_linter__rules__pylint__tests__PLE1141_dict_iter_missing_items.py.snap

@@ -39,3 +39,61 @@ help: Add a call to `.items()`
 18 | 
 19 | 
 note: This is an unsafe fix and may change runtime behavior
+
+PLE1141 [*] Unpacking a dictionary in iteration without calling `.items()`
+  --> dict_iter_missing_items.py:37:13
+   |
+35 | empty_dict = {}
+36 | empty_dict["x"] = 1
+37 | for k, v in empty_dict:
+   |             ^^^^^^^^^^
+38 |     pass
+   |
+help: Add a call to `.items()`
+34 | # Empty dict cases
+35 | empty_dict = {}
+36 | empty_dict["x"] = 1
+   - for k, v in empty_dict:
+37 + for k, v in empty_dict.items():
+38 |     pass
+39 | 
+40 | empty_dict_annotated_tuple_keys: dict[tuple[int, str], bool] = {}
+note: This is an unsafe fix and may change runtime behavior
+
+PLE1141 [*] Unpacking a dictionary in iteration without calling `.items()`
+  --> dict_iter_missing_items.py:46:13
+   |
+44 | empty_dict_unannotated = {}
+45 | empty_dict_unannotated[("x", "y")] = True
+46 | for k, v in empty_dict_unannotated:
+   |             ^^^^^^^^^^^^^^^^^^^^^^
+47 |     pass
+   |
+help: Add a call to `.items()`
+43 | 
+44 | empty_dict_unannotated = {}
+45 | empty_dict_unannotated[("x", "y")] = True
+   - for k, v in empty_dict_unannotated:
+46 + for k, v in empty_dict_unannotated.items():
+47 |     pass
+48 | 
+49 | empty_dict_annotated_str_keys: dict[str, int] = {}
+note: This is an unsafe fix and may change runtime behavior
+
+PLE1141 [*] Unpacking a dictionary in iteration without calling `.items()`
+  --> dict_iter_missing_items.py:51:13
+   |
+49 | empty_dict_annotated_str_keys: dict[str, int] = {}
+50 | empty_dict_annotated_str_keys["x"] = 1
+51 | for k, v in empty_dict_annotated_str_keys:
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+52 |     pass
+   |
+help: Add a call to `.items()`
+48 | 
+49 | empty_dict_annotated_str_keys: dict[str, int] = {}
+50 | empty_dict_annotated_str_keys["x"] = 1
+   - for k, v in empty_dict_annotated_str_keys:
+51 + for k, v in empty_dict_annotated_str_keys.items():
+52 |     pass
+note: This is an unsafe fix and may change runtime behavior

crates/ruff_linter/src/rules/pylint/snapshots/ruff_linter__rules__pylint__tests__PLR1708_stop_iteration_return.py.snap

@@ -107,3 +107,24 @@ PLR1708 Explicit `raise StopIteration` in generator
     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
     |
 help: Use `return` instead
+
+PLR1708 Explicit `raise StopIteration` in generator
+   --> stop_iteration_return.py:149:9
+    |
+147 |     yield 1
+148 |     class C:
+149 |         raise StopIteration  # Should trigger
+    |         ^^^^^^^^^^^^^^^^^^^
+150 |     yield C
+    |
+help: Use `return` instead
+
+PLR1708 Explicit `raise StopIteration` in generator
+   --> stop_iteration_return.py:154:5
+    |
+152 | # https://github.com/astral-sh/ruff/pull/21177#discussion_r2539702728
+153 | def foo():
+154 |     raise StopIteration((yield 1))  # Should trigger
+    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+    |
+help: Use `return` instead

crates/ruff_linter/src/rules/ruff/mod.rs

@@ -97,7 +97,8 @@ mod tests {
     #[test_case(Rule::MapIntVersionParsing, Path::new("RUF048_1.py"))]
     #[test_case(Rule::DataclassEnum, Path::new("RUF049.py"))]
     #[test_case(Rule::IfKeyInDictDel, Path::new("RUF051.py"))]
-    #[test_case(Rule::UsedDummyVariable, Path::new("RUF052.py"))]
+    #[test_case(Rule::UsedDummyVariable, Path::new("RUF052_0.py"))]
+    #[test_case(Rule::UsedDummyVariable, Path::new("RUF052_1.py"))]
     #[test_case(Rule::ClassWithMixedTypeVars, Path::new("RUF053.py"))]
     #[test_case(Rule::FalsyDictGetFallback, Path::new("RUF056.py"))]
     #[test_case(Rule::UnnecessaryRound, Path::new("RUF057.py"))]
@@ -621,8 +622,8 @@ mod tests {
         Ok(())
     }
 
-    #[test_case(Rule::UsedDummyVariable, Path::new("RUF052.py"), r"^_+", 1)]
-    #[test_case(Rule::UsedDummyVariable, Path::new("RUF052.py"), r"", 2)]
+    #[test_case(Rule::UsedDummyVariable, Path::new("RUF052_0.py"), r"^_+", 1)]
+    #[test_case(Rule::UsedDummyVariable, Path::new("RUF052_0.py"), r"", 2)]
     fn custom_regexp_preset(
         rule_code: Rule,
         path: &Path,

crates/ruff_linter/src/rules/ruff/rules/logging_eager_conversion.rs

@@ -2,7 +2,9 @@ use std::str::FromStr;
 
 use ruff_macros::{ViolationMetadata, derive_message_formats};
 use ruff_python_ast::{self as ast, Expr};
-use ruff_python_literal::cformat::{CFormatPart, CFormatString, CFormatType};
+use ruff_python_literal::cformat::{
+    CConversionFlags, CFormatPart, CFormatSpec, CFormatString, CFormatType,
+};
 use ruff_python_literal::format::FormatConversion;
 use ruff_text_size::Ranged;
 
@@ -195,7 +197,8 @@ pub(crate) fn logging_eager_conversion(checker: &Checker, call: &ast::ExprCall)
                 }
                 // %s with oct() - suggest using %#o instead
                 FormatConversion::Str
-                    if checker.semantic().match_builtin_expr(func.as_ref(), "oct") =>
+                    if checker.semantic().match_builtin_expr(func.as_ref(), "oct")
+                        && !has_complex_conversion_specifier(spec) =>
                 {
                     checker.report_diagnostic(
                         LoggingEagerConversion {
@@ -207,7 +210,8 @@ pub(crate) fn logging_eager_conversion(checker: &Checker, call: &ast::ExprCall)
                 }
                 // %s with hex() - suggest using %#x instead
                 FormatConversion::Str
-                    if checker.semantic().match_builtin_expr(func.as_ref(), "hex") =>
+                    if checker.semantic().match_builtin_expr(func.as_ref(), "hex")
+                        && !has_complex_conversion_specifier(spec) =>
                 {
                     checker.report_diagnostic(
                         LoggingEagerConversion {
@@ -222,3 +226,23 @@ pub(crate) fn logging_eager_conversion(checker: &Checker, call: &ast::ExprCall)
         }
     }
 }
+
+/// Check if a conversion specifier has complex flags or precision that make `oct()` or `hex()` necessary.
+///
+/// Returns `true` if any of these conditions are met:
+/// - Flag `0` (zero-pad) is used, flag `-` (left-adjust) is not used, and minimum width is specified
+/// - Flag ` ` (blank sign) is used
+/// - Flag `+` (sign char) is used
+/// - Precision is specified
+fn has_complex_conversion_specifier(spec: &CFormatSpec) -> bool {
+    if spec.flags.intersects(CConversionFlags::ZERO_PAD)
+        && !spec.flags.intersects(CConversionFlags::LEFT_ADJUST)
+        && spec.min_field_width.is_some()
+    {
+        return true;
+    }
+
+    spec.flags
+        .intersects(CConversionFlags::BLANK_SIGN | CConversionFlags::SIGN_CHAR)
+        || spec.precision.is_some()
+}

crates/ruff_linter/src/rules/ruff/rules/used_dummy_variable.rs

@@ -1,6 +1,6 @@
 use ruff_macros::{ViolationMetadata, derive_message_formats};
 use ruff_python_ast::helpers::is_dunder;
-use ruff_python_semantic::{Binding, BindingId};
+use ruff_python_semantic::{Binding, BindingId, BindingKind, ScopeKind};
 use ruff_python_stdlib::identifiers::is_identifier;
 use ruff_text_size::Ranged;
 
@@ -111,7 +111,7 @@ pub(crate) fn used_dummy_variable(checker: &Checker, binding: &Binding, binding_
         return;
     }
 
-    // We only emit the lint on variables defined via assignments.
+    // We only emit the lint on local variables.
     //
     // ## Why not also emit the lint on function parameters?
     //
@@ -127,8 +127,30 @@ pub(crate) fn used_dummy_variable(checker: &Checker, binding: &Binding, binding_
     // autofixing the diagnostic for assignments. See:
     // - <https://github.com/astral-sh/ruff/issues/14790>
     // - <https://github.com/astral-sh/ruff/issues/14799>
-    if !binding.kind.is_assignment() {
-        return;
+    match binding.kind {
+        BindingKind::Annotation
+        | BindingKind::Argument
+        | BindingKind::NamedExprAssignment
+        | BindingKind::Assignment
+        | BindingKind::LoopVar
+        | BindingKind::WithItemVar
+        | BindingKind::BoundException
+        | BindingKind::UnboundException(_) => {}
+
+        BindingKind::TypeParam
+        | BindingKind::Global(_)
+        | BindingKind::Nonlocal(_, _)
+        | BindingKind::Builtin
+        | BindingKind::ClassDefinition(_)
+        | BindingKind::FunctionDefinition(_)
+        | BindingKind::Export(_)
+        | BindingKind::FutureImport
+        | BindingKind::Import(_)
+        | BindingKind::FromImport(_)
+        | BindingKind::SubmoduleImport(_)
+        | BindingKind::Deletion
+        | BindingKind::ConditionalDeletion(_)
+        | BindingKind::DunderClassCell => return,
     }
 
     // This excludes `global` and `nonlocal` variables.
@@ -138,9 +160,12 @@ pub(crate) fn used_dummy_variable(checker: &Checker, binding: &Binding, binding_
 
     let semantic = checker.semantic();
 
-    // Only variables defined in function scopes
+    // Only variables defined in function and generator scopes
     let scope = &semantic.scopes[binding.scope];
-    if !scope.kind.is_function() {
+    if !matches!(
+        scope.kind,
+        ScopeKind::Function(_) | ScopeKind::Generator { .. }
+    ) {
         return;
     }
 

crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF052_RUF052_0.py.snap

@@ -2,7 +2,7 @@
 source: crates/ruff_linter/src/rules/ruff/mod.rs
 ---
 RUF052 [*] Local dummy variable `_var` is accessed
-  --> RUF052.py:92:9
+  --> RUF052_0.py:92:9
    |
 90 | class Class_:
 91 |     def fun(self):
@@ -24,7 +24,7 @@ help: Remove leading underscores
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_list` is accessed
-   --> RUF052.py:99:5
+   --> RUF052_0.py:99:5
     |
  98 | def fun():
  99 |     _list = "built-in" # [RUF052]
@@ -45,7 +45,7 @@ help: Prefer using trailing underscores to avoid shadowing a built-in
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_x` is accessed
-   --> RUF052.py:106:5
+   --> RUF052_0.py:106:5
     |
 104 | def fun():
 105 |     global x
@@ -67,7 +67,7 @@ help: Prefer using trailing underscores to avoid shadowing a variable
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_x` is accessed
-   --> RUF052.py:113:5
+   --> RUF052_0.py:113:5
     |
 111 |   def bar():
 112 |     nonlocal x
@@ -90,7 +90,7 @@ help: Prefer using trailing underscores to avoid shadowing a variable
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_x` is accessed
-   --> RUF052.py:120:5
+   --> RUF052_0.py:120:5
     |
 118 | def fun():
 119 |     x = "local"
@@ -112,7 +112,7 @@ help: Prefer using trailing underscores to avoid shadowing a variable
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 Local dummy variable `_GLOBAL_1` is accessed
-   --> RUF052.py:128:5
+   --> RUF052_0.py:128:5
     |
 127 | def unfixables():
 128 |     _GLOBAL_1 = "foo"
@@ -123,7 +123,7 @@ RUF052 Local dummy variable `_GLOBAL_1` is accessed
 help: Prefer using trailing underscores to avoid shadowing a variable
 
 RUF052 Local dummy variable `_local` is accessed
-   --> RUF052.py:136:5
+   --> RUF052_0.py:136:5
     |
 135 |     # unfixable because the rename would shadow a local variable
 136 |     _local = "local3"  # [RUF052]
@@ -133,7 +133,7 @@ RUF052 Local dummy variable `_local` is accessed
 help: Prefer using trailing underscores to avoid shadowing a variable
 
 RUF052 Local dummy variable `_GLOBAL_1` is accessed
-   --> RUF052.py:140:9
+   --> RUF052_0.py:140:9
     |
 139 |     def nested():
 140 |         _GLOBAL_1 = "foo"
@@ -144,7 +144,7 @@ RUF052 Local dummy variable `_GLOBAL_1` is accessed
 help: Prefer using trailing underscores to avoid shadowing a variable
 
 RUF052 Local dummy variable `_local` is accessed
-   --> RUF052.py:145:9
+   --> RUF052_0.py:145:9
     |
 144 |         # unfixable because the rename would shadow a variable from the outer function
 145 |         _local = "local4"
@@ -154,7 +154,7 @@ RUF052 Local dummy variable `_local` is accessed
 help: Prefer using trailing underscores to avoid shadowing a variable
 
 RUF052 [*] Local dummy variable `_P` is accessed
-   --> RUF052.py:153:5
+   --> RUF052_0.py:153:5
     |
 151 |     from collections import namedtuple
 152 |
@@ -184,7 +184,7 @@ help: Remove leading underscores
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_T` is accessed
-   --> RUF052.py:154:5
+   --> RUF052_0.py:154:5
     |
 153 |     _P = ParamSpec("_P")
 154 |     _T = TypeVar(name="_T", covariant=True, bound=int|str)
@@ -213,7 +213,7 @@ help: Remove leading underscores
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_NT` is accessed
-   --> RUF052.py:155:5
+   --> RUF052_0.py:155:5
     |
 153 |     _P = ParamSpec("_P")
 154 |     _T = TypeVar(name="_T", covariant=True, bound=int|str)
@@ -242,7 +242,7 @@ help: Remove leading underscores
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_E` is accessed
-   --> RUF052.py:156:5
+   --> RUF052_0.py:156:5
     |
 154 |     _T = TypeVar(name="_T", covariant=True, bound=int|str)
 155 |     _NT = NamedTuple("_NT", [("foo", int)])
@@ -270,7 +270,7 @@ help: Remove leading underscores
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_NT2` is accessed
-   --> RUF052.py:157:5
+   --> RUF052_0.py:157:5
     |
 155 |     _NT = NamedTuple("_NT", [("foo", int)])
 156 |     _E = Enum("_E", ["a", "b", "c"])
@@ -297,7 +297,7 @@ help: Remove leading underscores
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_NT3` is accessed
-   --> RUF052.py:158:5
+   --> RUF052_0.py:158:5
     |
 156 |     _E = Enum("_E", ["a", "b", "c"])
 157 |     _NT2 = namedtuple("_NT2", ['x', 'y', 'z'])
@@ -323,7 +323,7 @@ help: Remove leading underscores
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_DynamicClass` is accessed
-   --> RUF052.py:159:5
+   --> RUF052_0.py:159:5
     |
 157 |     _NT2 = namedtuple("_NT2", ['x', 'y', 'z'])
 158 |     _NT3 = namedtuple(typename="_NT3", field_names=['x', 'y', 'z'])
@@ -347,7 +347,7 @@ help: Remove leading underscores
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_NotADynamicClass` is accessed
-   --> RUF052.py:160:5
+   --> RUF052_0.py:160:5
     |
 158 |     _NT3 = namedtuple(typename="_NT3", field_names=['x', 'y', 'z'])
 159 |     _DynamicClass = type("_DynamicClass", (), {})
@@ -371,7 +371,7 @@ help: Remove leading underscores
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_dummy_var` is accessed
-   --> RUF052.py:182:5
+   --> RUF052_0.py:182:5
     |
 181 | def foo():
 182 |     _dummy_var = 42
@@ -396,7 +396,7 @@ help: Prefer using trailing underscores to avoid shadowing a variable
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 Local dummy variable `_dummy_var` is accessed
-   --> RUF052.py:192:5
+   --> RUF052_0.py:192:5
     |
 190 |     # Unfixable because both possible candidates for the new name are shadowed
 191 |     # in the scope of one of the references to the variable

crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF052_RUF052_1.py.snap

@@ -0,0 +1,494 @@
+---
+source: crates/ruff_linter/src/rules/ruff/mod.rs
+---
+RUF052 [*] Local dummy variable `_item` is accessed
+  --> RUF052_1.py:21:9
+   |
+20 |     # Should detect used dummy variable
+21 |     for _item in my_list:
+   |         ^^^^^
+22 |         print(_item["foo"])  # RUF052: Local dummy variable `_item` is accessed
+   |
+help: Remove leading underscores
+18 |     my_list = [{"foo": 1}, {"foo": 2}]
+19 | 
+20 |     # Should detect used dummy variable
+   -     for _item in my_list:
+   -         print(_item["foo"])  # RUF052: Local dummy variable `_item` is accessed
+21 +     for item in my_list:
+22 +         print(item["foo"])  # RUF052: Local dummy variable `_item` is accessed
+23 | 
+24 |     # Should detect used dummy variable
+25 |     for _index, _value in enumerate(my_list):
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_index` is accessed
+  --> RUF052_1.py:25:9
+   |
+24 |     # Should detect used dummy variable
+25 |     for _index, _value in enumerate(my_list):
+   |         ^^^^^^
+26 |         result = _index + _value["foo"]  # RUF052: Both `_index` and `_value` are accessed
+   |
+help: Remove leading underscores
+22 |         print(_item["foo"])  # RUF052: Local dummy variable `_item` is accessed
+23 | 
+24 |     # Should detect used dummy variable
+   -     for _index, _value in enumerate(my_list):
+   -         result = _index + _value["foo"]  # RUF052: Both `_index` and `_value` are accessed
+25 +     for index, _value in enumerate(my_list):
+26 +         result = index + _value["foo"]  # RUF052: Both `_index` and `_value` are accessed
+27 | 
+28 | # List Comprehensions
+29 | def test_list_comprehensions():
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_value` is accessed
+  --> RUF052_1.py:25:17
+   |
+24 |     # Should detect used dummy variable
+25 |     for _index, _value in enumerate(my_list):
+   |                 ^^^^^^
+26 |         result = _index + _value["foo"]  # RUF052: Both `_index` and `_value` are accessed
+   |
+help: Remove leading underscores
+22 |         print(_item["foo"])  # RUF052: Local dummy variable `_item` is accessed
+23 | 
+24 |     # Should detect used dummy variable
+   -     for _index, _value in enumerate(my_list):
+   -         result = _index + _value["foo"]  # RUF052: Both `_index` and `_value` are accessed
+25 +     for _index, value in enumerate(my_list):
+26 +         result = _index + value["foo"]  # RUF052: Both `_index` and `_value` are accessed
+27 | 
+28 | # List Comprehensions
+29 | def test_list_comprehensions():
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_item` is accessed
+  --> RUF052_1.py:33:32
+   |
+32 |     # Should detect used dummy variable
+33 |     result = [_item["foo"] for _item in my_list]  # RUF052: Local dummy variable `_item` is accessed
+   |                                ^^^^^
+34 |
+35 |     # Should detect used dummy variable in nested comprehension
+   |
+help: Remove leading underscores
+30 |     my_list = [{"foo": 1}, {"foo": 2}]
+31 | 
+32 |     # Should detect used dummy variable
+   -     result = [_item["foo"] for _item in my_list]  # RUF052: Local dummy variable `_item` is accessed
+33 +     result = [item["foo"] for item in my_list]  # RUF052: Local dummy variable `_item` is accessed
+34 | 
+35 |     # Should detect used dummy variable in nested comprehension
+36 |     nested = [[_item["foo"] for _item in _sublist] for _sublist in [my_list, my_list]]
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_item` is accessed
+  --> RUF052_1.py:36:33
+   |
+35 |     # Should detect used dummy variable in nested comprehension
+36 |     nested = [[_item["foo"] for _item in _sublist] for _sublist in [my_list, my_list]]
+   |                                 ^^^^^
+37 |     # RUF052: Both `_item` and `_sublist` are accessed
+   |
+help: Remove leading underscores
+33 |     result = [_item["foo"] for _item in my_list]  # RUF052: Local dummy variable `_item` is accessed
+34 | 
+35 |     # Should detect used dummy variable in nested comprehension
+   -     nested = [[_item["foo"] for _item in _sublist] for _sublist in [my_list, my_list]]
+36 +     nested = [[item["foo"] for item in _sublist] for _sublist in [my_list, my_list]]
+37 |     # RUF052: Both `_item` and `_sublist` are accessed
+38 | 
+39 |     # Should detect with conditions
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_sublist` is accessed
+  --> RUF052_1.py:36:56
+   |
+35 |     # Should detect used dummy variable in nested comprehension
+36 |     nested = [[_item["foo"] for _item in _sublist] for _sublist in [my_list, my_list]]
+   |                                                        ^^^^^^^^
+37 |     # RUF052: Both `_item` and `_sublist` are accessed
+   |
+help: Remove leading underscores
+33 |     result = [_item["foo"] for _item in my_list]  # RUF052: Local dummy variable `_item` is accessed
+34 | 
+35 |     # Should detect used dummy variable in nested comprehension
+   -     nested = [[_item["foo"] for _item in _sublist] for _sublist in [my_list, my_list]]
+36 +     nested = [[_item["foo"] for _item in sublist] for sublist in [my_list, my_list]]
+37 |     # RUF052: Both `_item` and `_sublist` are accessed
+38 | 
+39 |     # Should detect with conditions
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_item` is accessed
+  --> RUF052_1.py:40:34
+   |
+39 |     # Should detect with conditions
+40 |     filtered = [_item["foo"] for _item in my_list if _item["foo"] > 0]
+   |                                  ^^^^^
+41 |     # RUF052: Local dummy variable `_item` is accessed
+   |
+help: Remove leading underscores
+37 |     # RUF052: Both `_item` and `_sublist` are accessed
+38 | 
+39 |     # Should detect with conditions
+   -     filtered = [_item["foo"] for _item in my_list if _item["foo"] > 0]
+40 +     filtered = [item["foo"] for item in my_list if item["foo"] > 0]
+41 |     # RUF052: Local dummy variable `_item` is accessed
+42 | 
+43 | # Dict Comprehensions
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_item` is accessed
+  --> RUF052_1.py:48:48
+   |
+47 |     # Should detect used dummy variable
+48 |     result = {_item["key"]: _item["value"] for _item in my_list}
+   |                                                ^^^^^
+49 |     # RUF052: Local dummy variable `_item` is accessed
+   |
+help: Remove leading underscores
+45 |     my_list = [{"key": "a", "value": 1}, {"key": "b", "value": 2}]
+46 | 
+47 |     # Should detect used dummy variable
+   -     result = {_item["key"]: _item["value"] for _item in my_list}
+48 +     result = {item["key"]: item["value"] for item in my_list}
+49 |     # RUF052: Local dummy variable `_item` is accessed
+50 | 
+51 |     # Should detect with enumerate
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_index` is accessed
+  --> RUF052_1.py:52:43
+   |
+51 |     # Should detect with enumerate
+52 |     indexed = {_index: _item["value"] for _index, _item in enumerate(my_list)}
+   |                                           ^^^^^^
+53 |     # RUF052: Both `_index` and `_item` are accessed
+   |
+help: Remove leading underscores
+49 |     # RUF052: Local dummy variable `_item` is accessed
+50 | 
+51 |     # Should detect with enumerate
+   -     indexed = {_index: _item["value"] for _index, _item in enumerate(my_list)}
+52 +     indexed = {index: _item["value"] for index, _item in enumerate(my_list)}
+53 |     # RUF052: Both `_index` and `_item` are accessed
+54 | 
+55 |     # Should detect in nested dict comprehension
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_item` is accessed
+  --> RUF052_1.py:52:51
+   |
+51 |     # Should detect with enumerate
+52 |     indexed = {_index: _item["value"] for _index, _item in enumerate(my_list)}
+   |                                                   ^^^^^
+53 |     # RUF052: Both `_index` and `_item` are accessed
+   |
+help: Remove leading underscores
+49 |     # RUF052: Local dummy variable `_item` is accessed
+50 | 
+51 |     # Should detect with enumerate
+   -     indexed = {_index: _item["value"] for _index, _item in enumerate(my_list)}
+52 +     indexed = {_index: item["value"] for _index, item in enumerate(my_list)}
+53 |     # RUF052: Both `_index` and `_item` are accessed
+54 | 
+55 |     # Should detect in nested dict comprehension
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_inner` is accessed
+  --> RUF052_1.py:56:59
+   |
+55 |     # Should detect in nested dict comprehension
+56 |     nested = {_outer: {_inner["key"]: _inner["value"] for _inner in sublist}
+   |                                                           ^^^^^^
+57 |               for _outer, sublist in enumerate([my_list])}
+58 |     # RUF052: `_outer`, `_inner` are accessed
+   |
+help: Remove leading underscores
+53 |     # RUF052: Both `_index` and `_item` are accessed
+54 | 
+55 |     # Should detect in nested dict comprehension
+   -     nested = {_outer: {_inner["key"]: _inner["value"] for _inner in sublist}
+56 +     nested = {_outer: {inner["key"]: inner["value"] for inner in sublist}
+57 |               for _outer, sublist in enumerate([my_list])}
+58 |     # RUF052: `_outer`, `_inner` are accessed
+59 | 
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_outer` is accessed
+  --> RUF052_1.py:57:19
+   |
+55 |     # Should detect in nested dict comprehension
+56 |     nested = {_outer: {_inner["key"]: _inner["value"] for _inner in sublist}
+57 |               for _outer, sublist in enumerate([my_list])}
+   |                   ^^^^^^
+58 |     # RUF052: `_outer`, `_inner` are accessed
+   |
+help: Remove leading underscores
+53 |     # RUF052: Both `_index` and `_item` are accessed
+54 | 
+55 |     # Should detect in nested dict comprehension
+   -     nested = {_outer: {_inner["key"]: _inner["value"] for _inner in sublist}
+   -               for _outer, sublist in enumerate([my_list])}
+56 +     nested = {outer: {_inner["key"]: _inner["value"] for _inner in sublist}
+57 +               for outer, sublist in enumerate([my_list])}
+58 |     # RUF052: `_outer`, `_inner` are accessed
+59 | 
+60 | # Set Comprehensions
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_item` is accessed
+  --> RUF052_1.py:65:39
+   |
+64 |     # Should detect used dummy variable
+65 |     unique_values = {_item["foo"] for _item in my_list}
+   |                                       ^^^^^
+66 |     # RUF052: Local dummy variable `_item` is accessed
+   |
+help: Remove leading underscores
+62 |     my_list = [{"foo": 1}, {"foo": 2}, {"foo": 1}]  # Note: duplicate values
+63 | 
+64 |     # Should detect used dummy variable
+   -     unique_values = {_item["foo"] for _item in my_list}
+65 +     unique_values = {item["foo"] for item in my_list}
+66 |     # RUF052: Local dummy variable `_item` is accessed
+67 | 
+68 |     # Should detect with conditions
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_item` is accessed
+  --> RUF052_1.py:69:38
+   |
+68 |     # Should detect with conditions
+69 |     filtered_set = {_item["foo"] for _item in my_list if _item["foo"] > 0}
+   |                                      ^^^^^
+70 |     # RUF052: Local dummy variable `_item` is accessed
+   |
+help: Remove leading underscores
+66 |     # RUF052: Local dummy variable `_item` is accessed
+67 | 
+68 |     # Should detect with conditions
+   -     filtered_set = {_item["foo"] for _item in my_list if _item["foo"] > 0}
+69 +     filtered_set = {item["foo"] for item in my_list if item["foo"] > 0}
+70 |     # RUF052: Local dummy variable `_item` is accessed
+71 | 
+72 |     # Should detect with complex expression
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_item` is accessed
+  --> RUF052_1.py:73:39
+   |
+72 |     # Should detect with complex expression
+73 |     processed = {_item["foo"] * 2 for _item in my_list}
+   |                                       ^^^^^
+74 |     # RUF052: Local dummy variable `_item` is accessed
+   |
+help: Remove leading underscores
+70 |     # RUF052: Local dummy variable `_item` is accessed
+71 | 
+72 |     # Should detect with complex expression
+   -     processed = {_item["foo"] * 2 for _item in my_list}
+73 +     processed = {item["foo"] * 2 for item in my_list}
+74 |     # RUF052: Local dummy variable `_item` is accessed
+75 | 
+76 | # Generator Expressions
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_item` is accessed
+  --> RUF052_1.py:81:29
+   |
+80 |     # Should detect used dummy variable
+81 |     gen = (_item["foo"] for _item in my_list)
+   |                             ^^^^^
+82 |     # RUF052: Local dummy variable `_item` is accessed
+   |
+help: Remove leading underscores
+78 |     my_list = [{"foo": 1}, {"foo": 2}]
+79 | 
+80 |     # Should detect used dummy variable
+   -     gen = (_item["foo"] for _item in my_list)
+81 +     gen = (item["foo"] for item in my_list)
+82 |     # RUF052: Local dummy variable `_item` is accessed
+83 | 
+84 |     # Should detect when passed to function
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_item` is accessed
+  --> RUF052_1.py:85:34
+   |
+84 |     # Should detect when passed to function
+85 |     total = sum(_item["foo"] for _item in my_list)
+   |                                  ^^^^^
+86 |     # RUF052: Local dummy variable `_item` is accessed
+   |
+help: Remove leading underscores
+82 |     # RUF052: Local dummy variable `_item` is accessed
+83 | 
+84 |     # Should detect when passed to function
+   -     total = sum(_item["foo"] for _item in my_list)
+85 +     total = sum(item["foo"] for item in my_list)
+86 |     # RUF052: Local dummy variable `_item` is accessed
+87 | 
+88 |     # Should detect with multiple generators
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_x` is accessed
+  --> RUF052_1.py:89:27
+   |
+88 |     # Should detect with multiple generators
+89 |     pairs = ((_x, _y) for _x in range(3) for _y in range(3) if _x != _y)
+   |                           ^^
+90 |     # RUF052: Both `_x` and `_y` are accessed
+   |
+help: Remove leading underscores
+86 |     # RUF052: Local dummy variable `_item` is accessed
+87 | 
+88 |     # Should detect with multiple generators
+   -     pairs = ((_x, _y) for _x in range(3) for _y in range(3) if _x != _y)
+89 +     pairs = ((x, _y) for x in range(3) for _y in range(3) if x != _y)
+90 |     # RUF052: Both `_x` and `_y` are accessed
+91 | 
+92 |     # Should detect in nested generator
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_y` is accessed
+  --> RUF052_1.py:89:46
+   |
+88 |     # Should detect with multiple generators
+89 |     pairs = ((_x, _y) for _x in range(3) for _y in range(3) if _x != _y)
+   |                                              ^^
+90 |     # RUF052: Both `_x` and `_y` are accessed
+   |
+help: Remove leading underscores
+86 |     # RUF052: Local dummy variable `_item` is accessed
+87 | 
+88 |     # Should detect with multiple generators
+   -     pairs = ((_x, _y) for _x in range(3) for _y in range(3) if _x != _y)
+89 +     pairs = ((_x, y) for _x in range(3) for y in range(3) if _x != y)
+90 |     # RUF052: Both `_x` and `_y` are accessed
+91 | 
+92 |     # Should detect in nested generator
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_inner` is accessed
+  --> RUF052_1.py:93:41
+   |
+92 |     # Should detect in nested generator
+93 |     nested_gen = (sum(_inner["foo"] for _inner in sublist) for _sublist in [my_list] for sublist in _sublist)
+   |                                         ^^^^^^
+94 |     # RUF052: `_inner` and `_sublist` are accessed
+   |
+help: Remove leading underscores
+90 |     # RUF052: Both `_x` and `_y` are accessed
+91 | 
+92 |     # Should detect in nested generator
+   -     nested_gen = (sum(_inner["foo"] for _inner in sublist) for _sublist in [my_list] for sublist in _sublist)
+93 +     nested_gen = (sum(inner["foo"] for inner in sublist) for _sublist in [my_list] for sublist in _sublist)
+94 |     # RUF052: `_inner` and `_sublist` are accessed
+95 | 
+96 | # Complex Examples with Multiple Comprehension Types
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_sublist` is accessed
+  --> RUF052_1.py:93:64
+   |
+92 |     # Should detect in nested generator
+93 |     nested_gen = (sum(_inner["foo"] for _inner in sublist) for _sublist in [my_list] for sublist in _sublist)
+   |                                                                ^^^^^^^^
+94 |     # RUF052: `_inner` and `_sublist` are accessed
+   |
+help: Prefer using trailing underscores to avoid shadowing a variable
+90 |     # RUF052: Both `_x` and `_y` are accessed
+91 | 
+92 |     # Should detect in nested generator
+   -     nested_gen = (sum(_inner["foo"] for _inner in sublist) for _sublist in [my_list] for sublist in _sublist)
+93 +     nested_gen = (sum(_inner["foo"] for _inner in sublist) for sublist_ in [my_list] for sublist in sublist_)
+94 |     # RUF052: `_inner` and `_sublist` are accessed
+95 | 
+96 | # Complex Examples with Multiple Comprehension Types
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_val` is accessed
+   --> RUF052_1.py:102:30
+    |
+100 |     # Should detect in mixed comprehensions
+101 |     result = [
+102 |         {_key: [_val * 2 for _val in _record["items"]] for _key in ["doubled"]}
+    |                              ^^^^
+103 |         for _record in data
+104 |     ]
+    |
+help: Remove leading underscores
+99  | 
+100 |     # Should detect in mixed comprehensions
+101 |     result = [
+    -         {_key: [_val * 2 for _val in _record["items"]] for _key in ["doubled"]}
+102 +         {_key: [val * 2 for val in _record["items"]] for _key in ["doubled"]}
+103 |         for _record in data
+104 |     ]
+105 |     # RUF052: `_key`, `_val`, and `_record` are all accessed
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_key` is accessed
+   --> RUF052_1.py:102:60
+    |
+100 |     # Should detect in mixed comprehensions
+101 |     result = [
+102 |         {_key: [_val * 2 for _val in _record["items"]] for _key in ["doubled"]}
+    |                                                            ^^^^
+103 |         for _record in data
+104 |     ]
+    |
+help: Remove leading underscores
+99  | 
+100 |     # Should detect in mixed comprehensions
+101 |     result = [
+    -         {_key: [_val * 2 for _val in _record["items"]] for _key in ["doubled"]}
+102 +         {key: [_val * 2 for _val in _record["items"]] for key in ["doubled"]}
+103 |         for _record in data
+104 |     ]
+105 |     # RUF052: `_key`, `_val`, and `_record` are all accessed
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_record` is accessed
+   --> RUF052_1.py:103:13
+    |
+101 |     result = [
+102 |         {_key: [_val * 2 for _val in _record["items"]] for _key in ["doubled"]}
+103 |         for _record in data
+    |             ^^^^^^^
+104 |     ]
+105 |     # RUF052: `_key`, `_val`, and `_record` are all accessed
+    |
+help: Remove leading underscores
+99  | 
+100 |     # Should detect in mixed comprehensions
+101 |     result = [
+    -         {_key: [_val * 2 for _val in _record["items"]] for _key in ["doubled"]}
+    -         for _record in data
+102 +         {_key: [_val * 2 for _val in record["items"]] for _key in ["doubled"]}
+103 +         for record in data
+104 |     ]
+105 |     # RUF052: `_key`, `_val`, and `_record` are all accessed
+106 | 
+note: This is an unsafe fix and may change runtime behavior
+
+RUF052 [*] Local dummy variable `_item` is accessed
+   --> RUF052_1.py:108:43
+    |
+107 |     # Should detect in generator passed to list constructor
+108 |     gen_list = list(_item["items"][0] for _item in data)
+    |                                           ^^^^^
+109 |     # RUF052: Local dummy variable `_item` is accessed
+    |
+help: Remove leading underscores
+105 |     # RUF052: `_key`, `_val`, and `_record` are all accessed
+106 | 
+107 |     # Should detect in generator passed to list constructor
+    -     gen_list = list(_item["items"][0] for _item in data)
+108 +     gen_list = list(item["items"][0] for item in data)
+109 |     # RUF052: Local dummy variable `_item` is accessed
+note: This is an unsafe fix and may change runtime behavior

crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__custom_dummy_var_regexp_preset__RUF052_RUF052_0.py_1.snap

@@ -2,7 +2,7 @@
 source: crates/ruff_linter/src/rules/ruff/mod.rs
 ---
 RUF052 [*] Local dummy variable `_var` is accessed
-  --> RUF052.py:92:9
+  --> RUF052_0.py:92:9
    |
 90 | class Class_:
 91 |     def fun(self):
@@ -24,7 +24,7 @@ help: Remove leading underscores
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_list` is accessed
-   --> RUF052.py:99:5
+   --> RUF052_0.py:99:5
     |
  98 | def fun():
  99 |     _list = "built-in" # [RUF052]
@@ -45,7 +45,7 @@ help: Prefer using trailing underscores to avoid shadowing a built-in
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_x` is accessed
-   --> RUF052.py:106:5
+   --> RUF052_0.py:106:5
     |
 104 | def fun():
 105 |     global x
@@ -67,7 +67,7 @@ help: Prefer using trailing underscores to avoid shadowing a variable
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_x` is accessed
-   --> RUF052.py:113:5
+   --> RUF052_0.py:113:5
     |
 111 |   def bar():
 112 |     nonlocal x
@@ -90,7 +90,7 @@ help: Prefer using trailing underscores to avoid shadowing a variable
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_x` is accessed
-   --> RUF052.py:120:5
+   --> RUF052_0.py:120:5
     |
 118 | def fun():
 119 |     x = "local"
@@ -112,7 +112,7 @@ help: Prefer using trailing underscores to avoid shadowing a variable
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 Local dummy variable `_GLOBAL_1` is accessed
-   --> RUF052.py:128:5
+   --> RUF052_0.py:128:5
     |
 127 | def unfixables():
 128 |     _GLOBAL_1 = "foo"
@@ -123,7 +123,7 @@ RUF052 Local dummy variable `_GLOBAL_1` is accessed
 help: Prefer using trailing underscores to avoid shadowing a variable
 
 RUF052 Local dummy variable `_local` is accessed
-   --> RUF052.py:136:5
+   --> RUF052_0.py:136:5
     |
 135 |     # unfixable because the rename would shadow a local variable
 136 |     _local = "local3"  # [RUF052]
@@ -133,7 +133,7 @@ RUF052 Local dummy variable `_local` is accessed
 help: Prefer using trailing underscores to avoid shadowing a variable
 
 RUF052 Local dummy variable `_GLOBAL_1` is accessed
-   --> RUF052.py:140:9
+   --> RUF052_0.py:140:9
     |
 139 |     def nested():
 140 |         _GLOBAL_1 = "foo"
@@ -144,7 +144,7 @@ RUF052 Local dummy variable `_GLOBAL_1` is accessed
 help: Prefer using trailing underscores to avoid shadowing a variable
 
 RUF052 Local dummy variable `_local` is accessed
-   --> RUF052.py:145:9
+   --> RUF052_0.py:145:9
     |
 144 |         # unfixable because the rename would shadow a variable from the outer function
 145 |         _local = "local4"
@@ -154,7 +154,7 @@ RUF052 Local dummy variable `_local` is accessed
 help: Prefer using trailing underscores to avoid shadowing a variable
 
 RUF052 [*] Local dummy variable `_P` is accessed
-   --> RUF052.py:153:5
+   --> RUF052_0.py:153:5
     |
 151 |     from collections import namedtuple
 152 |
@@ -184,7 +184,7 @@ help: Remove leading underscores
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_T` is accessed
-   --> RUF052.py:154:5
+   --> RUF052_0.py:154:5
     |
 153 |     _P = ParamSpec("_P")
 154 |     _T = TypeVar(name="_T", covariant=True, bound=int|str)
@@ -213,7 +213,7 @@ help: Remove leading underscores
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_NT` is accessed
-   --> RUF052.py:155:5
+   --> RUF052_0.py:155:5
     |
 153 |     _P = ParamSpec("_P")
 154 |     _T = TypeVar(name="_T", covariant=True, bound=int|str)
@@ -242,7 +242,7 @@ help: Remove leading underscores
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_E` is accessed
-   --> RUF052.py:156:5
+   --> RUF052_0.py:156:5
     |
 154 |     _T = TypeVar(name="_T", covariant=True, bound=int|str)
 155 |     _NT = NamedTuple("_NT", [("foo", int)])
@@ -270,7 +270,7 @@ help: Remove leading underscores
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_NT2` is accessed
-   --> RUF052.py:157:5
+   --> RUF052_0.py:157:5
     |
 155 |     _NT = NamedTuple("_NT", [("foo", int)])
 156 |     _E = Enum("_E", ["a", "b", "c"])
@@ -297,7 +297,7 @@ help: Remove leading underscores
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_NT3` is accessed
-   --> RUF052.py:158:5
+   --> RUF052_0.py:158:5
     |
 156 |     _E = Enum("_E", ["a", "b", "c"])
 157 |     _NT2 = namedtuple("_NT2", ['x', 'y', 'z'])
@@ -323,7 +323,7 @@ help: Remove leading underscores
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_DynamicClass` is accessed
-   --> RUF052.py:159:5
+   --> RUF052_0.py:159:5
     |
 157 |     _NT2 = namedtuple("_NT2", ['x', 'y', 'z'])
 158 |     _NT3 = namedtuple(typename="_NT3", field_names=['x', 'y', 'z'])
@@ -347,7 +347,7 @@ help: Remove leading underscores
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_NotADynamicClass` is accessed
-   --> RUF052.py:160:5
+   --> RUF052_0.py:160:5
     |
 158 |     _NT3 = namedtuple(typename="_NT3", field_names=['x', 'y', 'z'])
 159 |     _DynamicClass = type("_DynamicClass", (), {})
@@ -371,7 +371,7 @@ help: Remove leading underscores
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 [*] Local dummy variable `_dummy_var` is accessed
-   --> RUF052.py:182:5
+   --> RUF052_0.py:182:5
     |
 181 | def foo():
 182 |     _dummy_var = 42
@@ -396,7 +396,7 @@ help: Prefer using trailing underscores to avoid shadowing a variable
 note: This is an unsafe fix and may change runtime behavior
 
 RUF052 Local dummy variable `_dummy_var` is accessed
-   --> RUF052.py:192:5
+   --> RUF052_0.py:192:5
     |
 190 |     # Unfixable because both possible candidates for the new name are shadowed
 191 |     # in the scope of one of the references to the variable

crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__custom_dummy_var_regexp_preset__RUF052_RUF052_0.py_2.snap

@@ -2,7 +2,7 @@
 source: crates/ruff_linter/src/rules/ruff/mod.rs
 ---
 RUF052 Local dummy variable `_var` is accessed
-  --> RUF052.py:92:9
+  --> RUF052_0.py:92:9
    |
 90 | class Class_:
 91 |     def fun(self):
@@ -13,7 +13,7 @@ RUF052 Local dummy variable `_var` is accessed
 help: Remove leading underscores
 
 RUF052 Local dummy variable `_list` is accessed
-   --> RUF052.py:99:5
+   --> RUF052_0.py:99:5
     |
  98 | def fun():
  99 |     _list = "built-in" # [RUF052]
@@ -23,7 +23,7 @@ RUF052 Local dummy variable `_list` is accessed
 help: Prefer using trailing underscores to avoid shadowing a built-in
 
 RUF052 Local dummy variable `_x` is accessed
-   --> RUF052.py:106:5
+   --> RUF052_0.py:106:5
     |
 104 | def fun():
 105 |     global x
@@ -34,7 +34,7 @@ RUF052 Local dummy variable `_x` is accessed
 help: Prefer using trailing underscores to avoid shadowing a variable
 
 RUF052 Local dummy variable `x` is accessed
-   --> RUF052.py:110:3
+   --> RUF052_0.py:110:3
     |
 109 | def foo():
 110 |   x = "outer"
@@ -44,7 +44,7 @@ RUF052 Local dummy variable `x` is accessed
     |
 
 RUF052 Local dummy variable `_x` is accessed
-   --> RUF052.py:113:5
+   --> RUF052_0.py:113:5
     |
 111 |   def bar():
 112 |     nonlocal x
@@ -56,7 +56,7 @@ RUF052 Local dummy variable `_x` is accessed
 help: Prefer using trailing underscores to avoid shadowing a variable
 
 RUF052 Local dummy variable `_x` is accessed
-   --> RUF052.py:120:5
+   --> RUF052_0.py:120:5
     |
 118 | def fun():
 119 |     x = "local"
@@ -67,7 +67,7 @@ RUF052 Local dummy variable `_x` is accessed
 help: Prefer using trailing underscores to avoid shadowing a variable
 
 RUF052 Local dummy variable `_GLOBAL_1` is accessed
-   --> RUF052.py:128:5
+   --> RUF052_0.py:128:5
     |
 127 | def unfixables():
 128 |     _GLOBAL_1 = "foo"
@@ -78,7 +78,7 @@ RUF052 Local dummy variable `_GLOBAL_1` is accessed
 help: Prefer using trailing underscores to avoid shadowing a variable
 
 RUF052 Local dummy variable `_local` is accessed
-   --> RUF052.py:136:5
+   --> RUF052_0.py:136:5
     |
 135 |     # unfixable because the rename would shadow a local variable
 136 |     _local = "local3"  # [RUF052]
@@ -88,7 +88,7 @@ RUF052 Local dummy variable `_local` is accessed
 help: Prefer using trailing underscores to avoid shadowing a variable
 
 RUF052 Local dummy variable `_GLOBAL_1` is accessed
-   --> RUF052.py:140:9
+   --> RUF052_0.py:140:9
     |
 139 |     def nested():
 140 |         _GLOBAL_1 = "foo"
@@ -99,7 +99,7 @@ RUF052 Local dummy variable `_GLOBAL_1` is accessed
 help: Prefer using trailing underscores to avoid shadowing a variable
 
 RUF052 Local dummy variable `_local` is accessed
-   --> RUF052.py:145:9
+   --> RUF052_0.py:145:9
     |
 144 |         # unfixable because the rename would shadow a variable from the outer function
 145 |         _local = "local4"
@@ -109,7 +109,7 @@ RUF052 Local dummy variable `_local` is accessed
 help: Prefer using trailing underscores to avoid shadowing a variable
 
 RUF052 Local dummy variable `_P` is accessed
-   --> RUF052.py:153:5
+   --> RUF052_0.py:153:5
     |
 151 |     from collections import namedtuple
 152 |
@@ -121,7 +121,7 @@ RUF052 Local dummy variable `_P` is accessed
 help: Remove leading underscores
 
 RUF052 Local dummy variable `_T` is accessed
-   --> RUF052.py:154:5
+   --> RUF052_0.py:154:5
     |
 153 |     _P = ParamSpec("_P")
 154 |     _T = TypeVar(name="_T", covariant=True, bound=int|str)
@@ -132,7 +132,7 @@ RUF052 Local dummy variable `_T` is accessed
 help: Remove leading underscores
 
 RUF052 Local dummy variable `_NT` is accessed
-   --> RUF052.py:155:5
+   --> RUF052_0.py:155:5
     |
 153 |     _P = ParamSpec("_P")
 154 |     _T = TypeVar(name="_T", covariant=True, bound=int|str)
@@ -144,7 +144,7 @@ RUF052 Local dummy variable `_NT` is accessed
 help: Remove leading underscores
 
 RUF052 Local dummy variable `_E` is accessed
-   --> RUF052.py:156:5
+   --> RUF052_0.py:156:5
     |
 154 |     _T = TypeVar(name="_T", covariant=True, bound=int|str)
 155 |     _NT = NamedTuple("_NT", [("foo", int)])
@@ -156,7 +156,7 @@ RUF052 Local dummy variable `_E` is accessed
 help: Remove leading underscores
 
 RUF052 Local dummy variable `_NT2` is accessed
-   --> RUF052.py:157:5
+   --> RUF052_0.py:157:5
     |
 155 |     _NT = NamedTuple("_NT", [("foo", int)])
 156 |     _E = Enum("_E", ["a", "b", "c"])
@@ -168,7 +168,7 @@ RUF052 Local dummy variable `_NT2` is accessed
 help: Remove leading underscores
 
 RUF052 Local dummy variable `_NT3` is accessed
-   --> RUF052.py:158:5
+   --> RUF052_0.py:158:5
     |
 156 |     _E = Enum("_E", ["a", "b", "c"])
 157 |     _NT2 = namedtuple("_NT2", ['x', 'y', 'z'])
@@ -180,7 +180,7 @@ RUF052 Local dummy variable `_NT3` is accessed
 help: Remove leading underscores
 
 RUF052 Local dummy variable `_DynamicClass` is accessed
-   --> RUF052.py:159:5
+   --> RUF052_0.py:159:5
     |
 157 |     _NT2 = namedtuple("_NT2", ['x', 'y', 'z'])
 158 |     _NT3 = namedtuple(typename="_NT3", field_names=['x', 'y', 'z'])
@@ -191,7 +191,7 @@ RUF052 Local dummy variable `_DynamicClass` is accessed
 help: Remove leading underscores
 
 RUF052 Local dummy variable `_NotADynamicClass` is accessed
-   --> RUF052.py:160:5
+   --> RUF052_0.py:160:5
     |
 158 |     _NT3 = namedtuple(typename="_NT3", field_names=['x', 'y', 'z'])
 159 |     _DynamicClass = type("_DynamicClass", (), {})
@@ -202,8 +202,18 @@ RUF052 Local dummy variable `_NotADynamicClass` is accessed
     |
 help: Remove leading underscores
 
+RUF052 Local dummy variable `other` is accessed
+   --> RUF052_0.py:177:13
+    |
+175 |             return
+176 |         _seen.add(self)
+177 |         for other in self.connected:
+    |             ^^^^^
+178 |             other.recurse(_seen=_seen)
+    |
+
 RUF052 Local dummy variable `_dummy_var` is accessed
-   --> RUF052.py:182:5
+   --> RUF052_0.py:182:5
     |
 181 | def foo():
 182 |     _dummy_var = 42
@@ -214,7 +224,7 @@ RUF052 Local dummy variable `_dummy_var` is accessed
 help: Prefer using trailing underscores to avoid shadowing a variable
 
 RUF052 Local dummy variable `_dummy_var` is accessed
-   --> RUF052.py:192:5
+   --> RUF052_0.py:192:5
     |
 190 |     # Unfixable because both possible candidates for the new name are shadowed
 191 |     # in the scope of one of the references to the variable

crates/ruff_python_ast/src/nodes.rs

@@ -773,10 +773,14 @@ pub trait StringFlags: Copy {
     }
 
     /// The total length of the string's closer.
-    /// This is always equal to `self.quote_len()`,
-    /// but is provided here for symmetry with the `opener_len()` method.
+    /// This is always equal to `self.quote_len()`, except when the string is unclosed,
+    /// in which case the length is zero.
     fn closer_len(self) -> TextSize {
-        self.quote_len()
+        if self.is_unclosed() {
+            TextSize::default()
+        } else {
+            self.quote_len()
+        }
     }
 
     fn as_any_string_flags(self) -> AnyStringFlags {

crates/ruff_python_formatter/resources/test/fixtures/ruff/expression/unary.py

@@ -193,3 +193,58 @@ def foo():
         not (aaaaaaaaaaaaaaaaaaaaa[bbbbbbbb, ccccccc]) and dddddddddd < eeeeeeeeeeeeeee
     ):
         pass
+
+# Regression tests for https://github.com/astral-sh/ruff/issues/19226
+if '' and (not #
+0):
+    pass
+
+if '' and (not #
+(0)
+):
+    pass
+
+if '' and (not
+	(  #
+	0
+)):
+    pass
+
+if (
+  not
+  # comment
+  (a)):
+    pass
+
+if not ( # comment
+      a):
+    pass
+
+if not (
+  # comment
+  (a)):
+    pass
+
+if not (
+  # comment
+  a):
+    pass
+
+not (# comment
+  (a))
+
+(-#comment
+ (a))
+
+if ( # a
+        # b
+  not # c
+  # d
+  ( # e
+      # f
+      a # g
+      # h
+  ) # i
+  # j
+):
+    pass

crates/ruff_python_formatter/resources/test/fixtures/ruff/fmt_skip/compound_one_liners.py

@@ -0,0 +1,149 @@
+# Test cases for fmt: skip on compound statements that fit on one line
+
+# Basic single-line compound statements
+def simple_func(): return "hello"  # fmt: skip
+if True: print("condition met")  # fmt: skip
+for i in range(5): print(i)  # fmt: skip
+while x < 10: x += 1  # fmt: skip
+
+# With expressions that would normally trigger formatting
+def long_params(a, b, c, d, e, f, g): return a + b + c + d + e + f + g  # fmt: skip
+if some_very_long_condition_that_might_wrap: do_something_else_that_is_long()  # fmt: skip
+
+# Nested compound statements (outer should be preserved)
+if True:
+    for i in range(10): print(i)  # fmt: skip
+
+# Multiple statements in body (should not apply - multiline)
+if True:
+    x = 1
+    y   =   2  # fmt: skip
+
+# With decorators - decorated function on one line
+@overload
+def decorated_func(x: int) -> str: return str(x)  # fmt: skip
+
+@property
+def prop_method(self): return self._value  # fmt: skip
+
+# Class definitions on one line
+class SimpleClass: pass  # fmt: skip
+class GenericClass(Generic[T]): pass  # fmt: skip
+
+# Try/except blocks
+try: risky_operation()  # fmt: skip
+except ValueError: handle_error()  # fmt: skip
+except: handle_any_error()  # fmt: skip
+else: success_case()  # fmt: skip
+finally: cleanup()  # fmt: skip
+
+# Match statements (Python 3.10+)
+match value:
+    case 1: print("one")  # fmt: skip
+    case _: print("other")  # fmt: skip
+
+# With statements
+with open("file.txt") as f: content = f.read()  # fmt: skip
+with context_manager() as cm: result = cm.process()  # fmt: skip
+
+# Async variants
+async def async_func(): return await some_call()  # fmt: skip
+async for item in async_iterator(): await process(item)  # fmt: skip
+async with async_context() as ctx: await ctx.work()  # fmt: skip
+
+# Complex expressions that would normally format
+def complex_expr(): return [x for x in range(100) if x % 2 == 0 and x > 50]  # fmt: skip
+if condition_a and condition_b or (condition_c and not condition_d): execute_complex_logic()  # fmt: skip
+
+# Edge case: comment positioning
+def func_with_comment():  # some comment
+    return "value"  # fmt: skip
+
+# Edge case: multiple fmt: skip (only last one should matter)
+def multiple_skip(): return "test"  # fmt: skip  # fmt: skip
+
+# Should NOT be affected (already multiline)
+def multiline_func():
+    return "this should format normally"
+
+if long_condition_that_spans \
+   and continues_on_next_line:
+    print("multiline condition")
+
+# Mix of skipped and non-skipped
+for i in range(10): print(f"item {i}")  # fmt: skip
+for j in range(5):
+    print(f"formatted item {j}")
+
+# With trailing comma that would normally be removed
+def trailing_comma_func(a, b, c,): return a + b + c  # fmt: skip
+
+# Dictionary/list comprehensions
+def dict_comp(): return {k: v for k, v in items.items() if v is not None}  # fmt: skip
+def list_comp(): return [x * 2 for x in numbers if x > threshold_value]  # fmt: skip
+
+# Lambda in one-liner
+def with_lambda(): return lambda x, y, z: x + y + z if all([x, y, z]) else None  # fmt: skip
+
+# String formatting that would normally be reformatted
+def format_string(): return f"Hello {name}, you have {count} items in your cart totaling ${total:.2f}"  # fmt: skip
+
+# loop else clauses
+for i in range(2): print(i) # fmt: skip
+else: print("this") # fmt: skip
+
+
+while foo(): print(i) # fmt: skip
+else: print("this") # fmt: skip
+
+# again but only the first skip
+for i in range(2): print(i) # fmt: skip
+else: print("this")
+
+
+while foo(): print(i) # fmt: skip
+else: print("this")
+
+# again but only the second skip
+for i in range(2): print(i)
+else: print("this") # fmt: skip
+
+
+while foo(): print(i)
+else: print("this") # fmt: skip
+
+# multiple statements in body
+if True: print("this"); print("that") # fmt: skip
+
+# Examples with more comments
+
+try: risky_operation()  # fmt: skip
+# leading 1
+except ValueError: handle_error()  # fmt: skip
+# leading 2
+except: handle_any_error()  # fmt: skip
+# leading 3
+else: success_case()  # fmt: skip
+# leading 4
+finally: cleanup()  # fmt: skip
+# trailing
+
+# multi-line before colon (should remain as is)
+if (
+	long_condition
+):  a     +     b # fmt: skip
+
+# over-indented comment example
+# See https://github.com/astral-sh/ruff/pull/20633#issuecomment-3453288910
+# and https://github.com/astral-sh/ruff/pull/21185
+
+for x in it: foo()
+    # comment
+else: bar() # fmt: skip
+
+
+if this(
+    'is a long',
+    # commented
+    'condition'
+): with_a_skip # fmt: skip

crates/ruff_python_formatter/src/comments/placement.rs

@@ -1890,9 +1890,11 @@ fn handle_lambda_comment<'a>(
     CommentPlacement::Default(comment)
 }
 
-/// Move comment between a unary op and its operand before the unary op by marking them as trailing.
+/// Move an end-of-line comment between a unary op and its operand after the operand by marking
+/// it as dangling.
 ///
 /// For example, given:
+///
 /// ```python
 /// (
 ///     not  # comment
@@ -1900,8 +1902,13 @@ fn handle_lambda_comment<'a>(
 /// )
 /// ```
 ///
-/// The `# comment` will be attached as a dangling comment on the enclosing node, to ensure that
-/// it remains on the same line as the operator.
+/// the `# comment` will be attached as a dangling comment on the unary op and formatted as:
+///
+/// ```python
+/// (
+///      not True  # comment
+/// )
+/// ```
 fn handle_unary_op_comment<'a>(
     comment: DecoratedComment<'a>,
     unary_op: &'a ast::ExprUnaryOp,
@@ -1923,8 +1930,8 @@ fn handle_unary_op_comment<'a>(
     let up_to = tokenizer
         .find(|token| token.kind == SimpleTokenKind::LParen)
         .map_or(unary_op.operand.start(), |lparen| lparen.start());
-    if comment.end() < up_to {
-        CommentPlacement::leading(unary_op, comment)
+    if comment.end() < up_to && comment.line_position().is_end_of_line() {
+        CommentPlacement::dangling(unary_op, comment)
     } else {
         CommentPlacement::Default(comment)
     }

crates/ruff_python_formatter/src/expression/expr_unary_op.rs

@@ -1,6 +1,8 @@
 use ruff_python_ast::AnyNodeRef;
 use ruff_python_ast::ExprUnaryOp;
 use ruff_python_ast::UnaryOp;
+use ruff_python_ast::parenthesize::parenthesized_range;
+use ruff_text_size::Ranged;
 
 use crate::comments::trailing_comments;
 use crate::expression::parentheses::{
@@ -39,20 +41,25 @@ impl FormatNodeRule<ExprUnaryOp> for FormatExprUnaryOp {
         // ```
         trailing_comments(dangling).fmt(f)?;
 
-        // Insert a line break if the operand has comments but itself is not parenthesized.
+        // Insert a line break if the operand has comments but itself is not parenthesized or if the
+        // operand is parenthesized but has a leading comment before the parentheses.
         // ```python
         // if (
         //  not
         //  # comment
-        //  a)
+        //  a):
+        //      pass
+        //
+        // if 1 and (
+        //     not
+        //     # comment
+        //     (
+        //         a
+        //     )
+        // ):
+        //     pass
         // ```
-        if comments.has_leading(operand.as_ref())
-            && !is_expression_parenthesized(
-                operand.as_ref().into(),
-                f.context().comments().ranges(),
-                f.context().source(),
-            )
-        {
+        if needs_line_break(item, f.context()) {
             hard_line_break().fmt(f)?;
         } else if op.is_not() {
             space().fmt(f)?;
@@ -76,17 +83,51 @@ impl NeedsParentheses for ExprUnaryOp {
         context: &PyFormatContext,
     ) -> OptionalParentheses {
         if parent.is_expr_await() {
-            OptionalParentheses::Always
-        } else if is_expression_parenthesized(
+            return OptionalParentheses::Always;
+        }
+
+        if needs_line_break(self, context) {
+            return OptionalParentheses::Always;
+        }
+
+        if is_expression_parenthesized(
             self.operand.as_ref().into(),
             context.comments().ranges(),
             context.source(),
         ) {
-            OptionalParentheses::Never
-        } else if context.comments().has(self.operand.as_ref()) {
-            OptionalParentheses::Always
-        } else {
-            self.operand.needs_parentheses(self.into(), context)
+            return OptionalParentheses::Never;
         }
+
+        if context.comments().has(self.operand.as_ref()) {
+            return OptionalParentheses::Always;
+        }
+
+        self.operand.needs_parentheses(self.into(), context)
     }
 }
+
+/// Returns `true` if the unary operator will have a hard line break between the operator and its
+/// operand and thus requires parentheses.
+fn needs_line_break(item: &ExprUnaryOp, context: &PyFormatContext) -> bool {
+    let comments = context.comments();
+    let parenthesized_operand_range = parenthesized_range(
+        item.operand.as_ref().into(),
+        item.into(),
+        comments.ranges(),
+        context.source(),
+    );
+    let leading_operand_comments = comments.leading(item.operand.as_ref());
+    let has_leading_comments_before_parens = parenthesized_operand_range.is_some_and(|range| {
+        leading_operand_comments
+            .iter()
+            .any(|comment| comment.start() < range.start())
+    });
+
+    !leading_operand_comments.is_empty()
+        && !is_expression_parenthesized(
+            item.operand.as_ref().into(),
+            context.comments().ranges(),
+            context.source(),
+        )
+        || has_leading_comments_before_parens
+}

crates/ruff_python_formatter/src/other/except_handler_except_handler.rs

@@ -7,7 +7,7 @@ use crate::expression::maybe_parenthesize_expression;
 use crate::expression::parentheses::Parenthesize;
 use crate::prelude::*;
 use crate::preview::is_remove_parens_around_except_types_enabled;
-use crate::statement::clause::{ClauseHeader, clause_body, clause_header};
+use crate::statement::clause::{ClauseHeader, clause};
 use crate::statement::suite::SuiteKind;
 
 #[derive(Copy, Clone, Default)]
@@ -55,77 +55,68 @@ impl FormatNodeRule<ExceptHandlerExceptHandler> for FormatExceptHandlerExceptHan
 
         write!(
             f,
-            [
-                clause_header(
-                    ClauseHeader::ExceptHandler(item),
-                    dangling_comments,
-                    &format_with(|f: &mut PyFormatter| {
-                        write!(
-                            f,
-                            [
-                                token("except"),
-                                match except_handler_kind {
-                                    ExceptHandlerKind::Regular => None,
-                                    ExceptHandlerKind::Starred => Some(token("*")),
-                                }
-                            ]
-                        )?;
+            [clause(
+                ClauseHeader::ExceptHandler(item),
+                &format_with(|f: &mut PyFormatter| {
+                    write!(
+                        f,
+                        [
+                            token("except"),
+                            match except_handler_kind {
+                                ExceptHandlerKind::Regular => None,
+                                ExceptHandlerKind::Starred => Some(token("*")),
+                            }
+                        ]
+                    )?;
 
-                        match type_.as_deref() {
-                            // For tuples of exception types without an `as` name and on 3.14+, the
-                            // parentheses are optional.
-                            //
-                            // ```py
-                            // try:
-                            //     ...
-                            // except BaseException, Exception:  # Ok
-                            //     ...
-                            // ```
-                            Some(Expr::Tuple(tuple))
-                                if f.options().target_version() >= PythonVersion::PY314
-                                    && is_remove_parens_around_except_types_enabled(
-                                        f.context(),
-                                    )
-                                    && name.is_none() =>
-                            {
-                                write!(
-                                    f,
-                                    [
-                                        space(),
-                                        tuple
-                                            .format()
-                                            .with_options(TupleParentheses::NeverPreserve)
-                                    ]
-                                )?;
-                            }
-                            Some(type_) => {
-                                write!(
-                                    f,
-                                    [
-                                        space(),
-                                        maybe_parenthesize_expression(
-                                            type_,
-                                            item,
-                                            Parenthesize::IfBreaks
-                                        )
-                                    ]
-                                )?;
-                                if let Some(name) = name {
-                                    write!(f, [space(), token("as"), space(), name.format()])?;
-                                }
-                            }
-                            _ => {}
+                    match type_.as_deref() {
+                        // For tuples of exception types without an `as` name and on 3.14+, the
+                        // parentheses are optional.
+                        //
+                        // ```py
+                        // try:
+                        //     ...
+                        // except BaseException, Exception:  # Ok
+                        //     ...
+                        // ```
+                        Some(Expr::Tuple(tuple))
+                            if f.options().target_version() >= PythonVersion::PY314
+                                && is_remove_parens_around_except_types_enabled(f.context())
+                                && name.is_none() =>
+                        {
+                            write!(
+                                f,
+                                [
+                                    space(),
+                                    tuple.format().with_options(TupleParentheses::NeverPreserve)
+                                ]
+                            )?;
                         }
+                        Some(type_) => {
+                            write!(
+                                f,
+                                [
+                                    space(),
+                                    maybe_parenthesize_expression(
+                                        type_,
+                                        item,
+                                        Parenthesize::IfBreaks
+                                    )
+                                ]
+                            )?;
+                            if let Some(name) = name {
+                                write!(f, [space(), token("as"), space(), name.format()])?;
+                            }
+                        }
+                        _ => {}
+                    }
 
-                        Ok(())
-                    }),
-                ),
-                clause_body(
-                    body,
-                    SuiteKind::other(self.last_suite_in_statement),
-                    dangling_comments
-                ),
-            ]
+                    Ok(())
+                }),
+                dangling_comments,
+                body,
+                SuiteKind::other(self.last_suite_in_statement),
+            )]
         )
     }
 }

crates/ruff_python_formatter/src/other/match_case.rs

@@ -5,7 +5,7 @@ use crate::expression::maybe_parenthesize_expression;
 use crate::expression::parentheses::Parenthesize;
 use crate::pattern::maybe_parenthesize_pattern;
 use crate::prelude::*;
-use crate::statement::clause::{ClauseHeader, clause_body, clause_header};
+use crate::statement::clause::{ClauseHeader, clause};
 use crate::statement::suite::SuiteKind;
 
 #[derive(Default)]
@@ -46,23 +46,18 @@ impl FormatNodeRule<MatchCase> for FormatMatchCase {
 
         write!(
             f,
-            [
-                clause_header(
-                    ClauseHeader::MatchCase(item),
-                    dangling_item_comments,
-                    &format_args![
-                        token("case"),
-                        space(),
-                        maybe_parenthesize_pattern(pattern, item),
-                        format_guard
-                    ],
-                ),
-                clause_body(
-                    body,
-                    SuiteKind::other(self.last_suite_in_statement),
-                    dangling_item_comments
-                ),
-            ]
+            [clause(
+                ClauseHeader::MatchCase(item),
+                &format_args![
+                    token("case"),
+                    space(),
+                    maybe_parenthesize_pattern(pattern, item),
+                    format_guard
+                ],
+                dangling_item_comments,
+                body,
+                SuiteKind::other(self.last_suite_in_statement),
+            )]
         )
     }
 }

crates/ruff_python_formatter/src/statement/clause.rs

@@ -5,11 +5,12 @@ use ruff_python_ast::{
     StmtIf, StmtMatch, StmtTry, StmtWhile, StmtWith, Suite,
 };
 use ruff_python_trivia::{SimpleToken, SimpleTokenKind, SimpleTokenizer};
+use ruff_source_file::LineRanges;
 use ruff_text_size::{Ranged, TextRange, TextSize};
 
 use crate::comments::{SourceComment, leading_alternate_branch_comments, trailing_comments};
 use crate::statement::suite::{SuiteKind, as_only_an_ellipsis};
-use crate::verbatim::write_suppressed_clause_header;
+use crate::verbatim::{verbatim_text, write_suppressed_clause_header};
 use crate::{has_skip_comment, prelude::*};
 
 /// The header of a compound statement clause.
@@ -36,7 +37,41 @@ pub(crate) enum ClauseHeader<'a> {
     OrElse(ElseClause<'a>),
 }
 
-impl ClauseHeader<'_> {
+impl<'a> ClauseHeader<'a> {
+    /// Returns the last child in the clause body immediately following this clause header.
+    ///
+    /// For most clauses, this is the last statement in
+    /// the primary body. For clauses like `try`, it specifically returns the last child
+    /// in the `try` body, not the `except`/`else`/`finally` clauses.
+    ///
+    /// This is similar to [`ruff_python_ast::AnyNodeRef::last_child_in_body`]
+    /// but restricted to the clause.
+    pub(crate) fn last_child_in_clause(self) -> Option<AnyNodeRef<'a>> {
+        match self {
+            ClauseHeader::Class(StmtClassDef { body, .. })
+            | ClauseHeader::Function(StmtFunctionDef { body, .. })
+            | ClauseHeader::If(StmtIf { body, .. })
+            | ClauseHeader::ElifElse(ElifElseClause { body, .. })
+            | ClauseHeader::Try(StmtTry { body, .. })
+            | ClauseHeader::MatchCase(MatchCase { body, .. })
+            | ClauseHeader::For(StmtFor { body, .. })
+            | ClauseHeader::While(StmtWhile { body, .. })
+            | ClauseHeader::With(StmtWith { body, .. })
+            | ClauseHeader::ExceptHandler(ExceptHandlerExceptHandler { body, .. })
+            | ClauseHeader::OrElse(
+                ElseClause::Try(StmtTry { orelse: body, .. })
+                | ElseClause::For(StmtFor { orelse: body, .. })
+                | ElseClause::While(StmtWhile { orelse: body, .. }),
+            )
+            | ClauseHeader::TryFinally(StmtTry {
+                finalbody: body, ..
+            }) => body.last().map(AnyNodeRef::from),
+            ClauseHeader::Match(StmtMatch { cases, .. }) => cases
+                .last()
+                .and_then(|case| case.body.last().map(AnyNodeRef::from)),
+        }
+    }
+
     /// The range from the clause keyword up to and including the final colon.
     pub(crate) fn range(self, source: &str) -> FormatResult<TextRange> {
         let keyword_range = self.first_keyword_range(source)?;
@@ -338,6 +373,28 @@ impl ClauseHeader<'_> {
     }
 }
 
+impl<'a> From<ClauseHeader<'a>> for AnyNodeRef<'a> {
+    fn from(value: ClauseHeader<'a>) -> Self {
+        match value {
+            ClauseHeader::Class(stmt_class_def) => stmt_class_def.into(),
+            ClauseHeader::Function(stmt_function_def) => stmt_function_def.into(),
+            ClauseHeader::If(stmt_if) => stmt_if.into(),
+            ClauseHeader::ElifElse(elif_else_clause) => elif_else_clause.into(),
+            ClauseHeader::Try(stmt_try) => stmt_try.into(),
+            ClauseHeader::ExceptHandler(except_handler_except_handler) => {
+                except_handler_except_handler.into()
+            }
+            ClauseHeader::TryFinally(stmt_try) => stmt_try.into(),
+            ClauseHeader::Match(stmt_match) => stmt_match.into(),
+            ClauseHeader::MatchCase(match_case) => match_case.into(),
+            ClauseHeader::For(stmt_for) => stmt_for.into(),
+            ClauseHeader::While(stmt_while) => stmt_while.into(),
+            ClauseHeader::With(stmt_with) => stmt_with.into(),
+            ClauseHeader::OrElse(else_clause) => else_clause.into(),
+        }
+    }
+}
+
 #[derive(Copy, Clone)]
 pub(crate) enum ElseClause<'a> {
     Try(&'a StmtTry),
@@ -345,6 +402,16 @@ pub(crate) enum ElseClause<'a> {
     While(&'a StmtWhile),
 }
 
+impl<'a> From<ElseClause<'a>> for AnyNodeRef<'a> {
+    fn from(value: ElseClause<'a>) -> Self {
+        match value {
+            ElseClause::Try(stmt_try) => stmt_try.into(),
+            ElseClause::For(stmt_for) => stmt_for.into(),
+            ElseClause::While(stmt_while) => stmt_while.into(),
+        }
+    }
+}
+
 pub(crate) struct FormatClauseHeader<'a, 'ast> {
     header: ClauseHeader<'a>,
     /// How to format the clause header
@@ -378,22 +445,6 @@ where
     }
 }
 
-impl<'a> FormatClauseHeader<'a, '_> {
-    /// Sets the leading comments that precede an alternate branch.
-    #[must_use]
-    pub(crate) fn with_leading_comments<N>(
-        mut self,
-        comments: &'a [SourceComment],
-        last_node: Option<N>,
-    ) -> Self
-    where
-        N: Into<AnyNodeRef<'a>>,
-    {
-        self.leading_comments = Some((comments, last_node.map(Into::into)));
-        self
-    }
-}
-
 impl<'ast> Format<PyFormatContext<'ast>> for FormatClauseHeader<'_, 'ast> {
     fn fmt(&self, f: &mut Formatter<PyFormatContext<'ast>>) -> FormatResult<()> {
         if let Some((leading_comments, last_node)) = self.leading_comments {
@@ -423,13 +474,13 @@ impl<'ast> Format<PyFormatContext<'ast>> for FormatClauseHeader<'_, 'ast> {
     }
 }
 
-pub(crate) struct FormatClauseBody<'a> {
+struct FormatClauseBody<'a> {
     body: &'a Suite,
     kind: SuiteKind,
     trailing_comments: &'a [SourceComment],
 }
 
-pub(crate) fn clause_body<'a>(
+fn clause_body<'a>(
     body: &'a Suite,
     kind: SuiteKind,
     trailing_comments: &'a [SourceComment],
@@ -465,6 +516,84 @@ impl Format<PyFormatContext<'_>> for FormatClauseBody<'_> {
     }
 }
 
+pub(crate) struct FormatClause<'a, 'ast> {
+    header: ClauseHeader<'a>,
+    /// How to format the clause header
+    header_formatter: Argument<'a, PyFormatContext<'ast>>,
+    /// Leading comments coming before the branch, together with the previous node, if any. Only relevant
+    /// for alternate branches.
+    leading_comments: Option<(&'a [SourceComment], Option<AnyNodeRef<'a>>)>,
+    /// The trailing comments coming after the colon.
+    trailing_colon_comment: &'a [SourceComment],
+    body: &'a Suite,
+    kind: SuiteKind,
+}
+
+impl<'a, 'ast> FormatClause<'a, 'ast> {
+    /// Sets the leading comments that precede an alternate branch.
+    #[must_use]
+    pub(crate) fn with_leading_comments<N>(
+        mut self,
+        comments: &'a [SourceComment],
+        last_node: Option<N>,
+    ) -> Self
+    where
+        N: Into<AnyNodeRef<'a>>,
+    {
+        self.leading_comments = Some((comments, last_node.map(Into::into)));
+        self
+    }
+
+    fn clause_header(&self) -> FormatClauseHeader<'a, 'ast> {
+        FormatClauseHeader {
+            header: self.header,
+            formatter: self.header_formatter,
+            leading_comments: self.leading_comments,
+            trailing_colon_comment: self.trailing_colon_comment,
+        }
+    }
+
+    fn clause_body(&self) -> FormatClauseBody<'a> {
+        clause_body(self.body, self.kind, self.trailing_colon_comment)
+    }
+}
+
+/// Formats a clause, handling the case where the compound
+/// statement lies on a single line with `# fmt: skip` and
+/// should be suppressed.
+pub(crate) fn clause<'a, 'ast, Content>(
+    header: ClauseHeader<'a>,
+    header_formatter: &'a Content,
+    trailing_colon_comment: &'a [SourceComment],
+    body: &'a Suite,
+    kind: SuiteKind,
+) -> FormatClause<'a, 'ast>
+where
+    Content: Format<PyFormatContext<'ast>>,
+{
+    FormatClause {
+        header,
+        header_formatter: Argument::new(header_formatter),
+        leading_comments: None,
+        trailing_colon_comment,
+        body,
+        kind,
+    }
+}
+
+impl<'ast> Format<PyFormatContext<'ast>> for FormatClause<'_, 'ast> {
+    fn fmt(&self, f: &mut Formatter<PyFormatContext<'ast>>) -> FormatResult<()> {
+        match should_suppress_clause(self, f)? {
+            SuppressClauseHeader::Yes {
+                last_child_in_clause,
+            } => write_suppressed_clause(self, f, last_child_in_clause),
+            SuppressClauseHeader::No => {
+                write!(f, [self.clause_header(), self.clause_body()])
+            }
+        }
+    }
+}
+
 /// Finds the range of `keyword` starting the search at `start_position`.
 ///
 /// If the start position is at the end of the previous statement, the
@@ -587,3 +716,96 @@ fn colon_range(after_keyword_or_condition: TextSize, source: &str) -> FormatResu
         }
     }
 }
+
+fn should_suppress_clause<'a>(
+    clause: &FormatClause<'a, '_>,
+    f: &mut Formatter<PyFormatContext<'_>>,
+) -> FormatResult<SuppressClauseHeader<'a>> {
+    let source = f.context().source();
+
+    let Some(last_child_in_clause) = clause.header.last_child_in_clause() else {
+        return Ok(SuppressClauseHeader::No);
+    };
+
+    // Early return if we don't have a skip comment
+    // to avoid computing header range in the common case
+    if !has_skip_comment(
+        f.context().comments().trailing(last_child_in_clause),
+        source,
+    ) {
+        return Ok(SuppressClauseHeader::No);
+    }
+
+    let clause_start = clause.header.range(source)?.end();
+
+    let clause_range = TextRange::new(clause_start, last_child_in_clause.end());
+
+    // Only applies to clauses on a single line
+    if source.contains_line_break(clause_range) {
+        return Ok(SuppressClauseHeader::No);
+    }
+
+    Ok(SuppressClauseHeader::Yes {
+        last_child_in_clause,
+    })
+}
+
+#[cold]
+fn write_suppressed_clause(
+    clause: &FormatClause,
+    f: &mut Formatter<PyFormatContext<'_>>,
+    last_child_in_clause: AnyNodeRef,
+) -> FormatResult<()> {
+    if let Some((leading_comments, last_node)) = clause.leading_comments {
+        leading_alternate_branch_comments(leading_comments, last_node).fmt(f)?;
+    }
+
+    let header = clause.header;
+    let clause_start = header.first_keyword_range(f.context().source())?.start();
+
+    let comments = f.context().comments().clone();
+
+    let clause_end = last_child_in_clause.end();
+
+    // Write the outer comments and format the node as verbatim
+    write!(
+        f,
+        [
+            source_position(clause_start),
+            verbatim_text(TextRange::new(clause_start, clause_end)),
+            source_position(clause_end),
+            trailing_comments(comments.trailing(last_child_in_clause)),
+            hard_line_break()
+        ]
+    )?;
+
+    // We mark comments in the header as formatted as in
+    // the implementation of [`write_suppressed_clause_header`].
+    //
+    // Note that the header may be multi-line and contain
+    // various comments since we only require that the range
+    // starting at the _colon_ and ending at the `# fmt: skip`
+    // fits on one line.
+    header.visit(&mut |child| {
+        for comment in comments.leading_trailing(child) {
+            comment.mark_formatted();
+        }
+        comments.mark_verbatim_node_comments_formatted(child);
+    });
+
+    // Similarly we mark the comments in the body as formatted.
+    // Note that the trailing comments for the last child in the
+    // body have already been handled above.
+    for stmt in clause.body {
+        comments.mark_verbatim_node_comments_formatted(stmt.into());
+    }
+
+    Ok(())
+}
+
+enum SuppressClauseHeader<'a> {
+    No,
+    Yes {
+        last_child_in_clause: AnyNodeRef<'a>,
+    },
+}

crates/ruff_python_formatter/src/statement/stmt_class_def.rs

@@ -8,7 +8,7 @@ use crate::comments::format::{
 };
 use crate::comments::{SourceComment, leading_comments, trailing_comments};
 use crate::prelude::*;
-use crate::statement::clause::{ClauseHeader, clause_body, clause_header};
+use crate::statement::clause::{ClauseHeader, clause};
 use crate::statement::suite::SuiteKind;
 
 #[derive(Default)]
@@ -65,9 +65,8 @@ impl FormatNodeRule<StmtClassDef> for FormatStmtClassDef {
                     decorators: decorator_list,
                     leading_definition_comments,
                 },
-                clause_header(
+                clause(
                     ClauseHeader::Class(item),
-                    trailing_definition_comments,
                     &format_with(|f| {
                         write!(f, [token("class"), space(), name.format()])?;
 
@@ -132,8 +131,10 @@ impl FormatNodeRule<StmtClassDef> for FormatStmtClassDef {
 
                         Ok(())
                     }),
+                    trailing_definition_comments,
+                    body,
+                    SuiteKind::Class,
                 ),
-                clause_body(body, SuiteKind::Class, trailing_definition_comments),
             ]
         )?;
 

crates/ruff_python_formatter/src/statement/stmt_for.rs

@@ -6,7 +6,7 @@ use crate::expression::expr_tuple::TupleParentheses;
 use crate::expression::maybe_parenthesize_expression;
 use crate::expression::parentheses::Parenthesize;
 use crate::prelude::*;
-use crate::statement::clause::{ClauseHeader, ElseClause, clause_body, clause_header};
+use crate::statement::clause::{ClauseHeader, ElseClause, clause};
 use crate::statement::suite::SuiteKind;
 
 #[derive(Debug)]
@@ -50,27 +50,22 @@ impl FormatNodeRule<StmtFor> for FormatStmtFor {
 
         write!(
             f,
-            [
-                clause_header(
-                    ClauseHeader::For(item),
-                    trailing_condition_comments,
-                    &format_args![
-                        is_async.then_some(format_args![token("async"), space()]),
-                        token("for"),
-                        space(),
-                        ExprTupleWithoutParentheses(target),
-                        space(),
-                        token("in"),
-                        space(),
-                        maybe_parenthesize_expression(iter, item, Parenthesize::IfBreaks),
-                    ],
-                ),
-                clause_body(
-                    body,
-                    SuiteKind::other(orelse.is_empty()),
-                    trailing_condition_comments
-                ),
-            ]
+            [clause(
+                ClauseHeader::For(item),
+                &format_args![
+                    is_async.then_some(format_args![token("async"), space()]),
+                    token("for"),
+                    space(),
+                    ExprTupleWithoutParentheses(target),
+                    space(),
+                    token("in"),
+                    space(),
+                    maybe_parenthesize_expression(iter, item, Parenthesize::IfBreaks),
+                ],
+                trailing_condition_comments,
+                body,
+                SuiteKind::other(orelse.is_empty()),
+            ),]
         )?;
 
         if orelse.is_empty() {
@@ -84,15 +79,14 @@ impl FormatNodeRule<StmtFor> for FormatStmtFor {
 
             write!(
                 f,
-                [
-                    clause_header(
-                        ClauseHeader::OrElse(ElseClause::For(item)),
-                        trailing,
-                        &token("else"),
-                    )
-                    .with_leading_comments(leading, body.last()),
-                    clause_body(orelse, SuiteKind::other(true), trailing),
-                ]
+                [clause(
+                    ClauseHeader::OrElse(ElseClause::For(item)),
+                    &token("else"),
+                    trailing,
+                    orelse,
+                    SuiteKind::other(true),
+                )
+                .with_leading_comments(leading, body.last())]
             )?;
         }
 

crates/ruff_python_formatter/src/statement/stmt_function_def.rs

@@ -4,7 +4,7 @@ use crate::comments::format::{
 use crate::expression::maybe_parenthesize_expression;
 use crate::expression::parentheses::{Parentheses, Parenthesize};
 use crate::prelude::*;
-use crate::statement::clause::{ClauseHeader, clause_body, clause_header};
+use crate::statement::clause::{ClauseHeader, clause};
 use crate::statement::stmt_class_def::FormatDecorators;
 use crate::statement::suite::SuiteKind;
 use ruff_formatter::write;
@@ -60,12 +60,13 @@ impl FormatNodeRule<StmtFunctionDef> for FormatStmtFunctionDef {
                     decorators: decorator_list,
                     leading_definition_comments,
                 },
-                clause_header(
+                clause(
                     ClauseHeader::Function(item),
-                    trailing_definition_comments,
                     &format_with(|f| format_function_header(f, item)),
+                    trailing_definition_comments,
+                    body,
+                    SuiteKind::Function,
                 ),
-                clause_body(body, SuiteKind::Function, trailing_definition_comments),
             ]
         )?;
 

crates/ruff_python_formatter/src/statement/stmt_if.rs

@@ -5,7 +5,7 @@ use ruff_text_size::Ranged;
 use crate::expression::maybe_parenthesize_expression;
 use crate::expression::parentheses::Parenthesize;
 use crate::prelude::*;
-use crate::statement::clause::{ClauseHeader, clause_body, clause_header};
+use crate::statement::clause::{ClauseHeader, clause};
 use crate::statement::suite::SuiteKind;
 
 #[derive(Default)]
@@ -26,22 +26,17 @@ impl FormatNodeRule<StmtIf> for FormatStmtIf {
 
         write!(
             f,
-            [
-                clause_header(
-                    ClauseHeader::If(item),
-                    trailing_colon_comment,
-                    &format_args![
-                        token("if"),
-                        space(),
-                        maybe_parenthesize_expression(test, item, Parenthesize::IfBreaks),
-                    ],
-                ),
-                clause_body(
-                    body,
-                    SuiteKind::other(elif_else_clauses.is_empty()),
-                    trailing_colon_comment
-                ),
-            ]
+            [clause(
+                ClauseHeader::If(item),
+                &format_args![
+                    token("if"),
+                    space(),
+                    maybe_parenthesize_expression(test, item, Parenthesize::IfBreaks),
+                ],
+                trailing_colon_comment,
+                body,
+                SuiteKind::other(elif_else_clauses.is_empty()),
+            )]
         )?;
 
         let mut last_node = body.last().unwrap().into();
@@ -81,9 +76,8 @@ pub(crate) fn format_elif_else_clause(
     write!(
         f,
         [
-            clause_header(
+            clause(
                 ClauseHeader::ElifElse(item),
-                trailing_colon_comment,
                 &format_with(|f: &mut PyFormatter| {
                     f.options()
                         .source_map_generation()
@@ -103,9 +97,11 @@ pub(crate) fn format_elif_else_clause(
                         token("else").fmt(f)
                     }
                 }),
+                trailing_colon_comment,
+                body,
+                suite_kind,
             )
             .with_leading_comments(leading_comments, last_node),
-            clause_body(body, suite_kind, trailing_colon_comment),
             f.options()
                 .source_map_generation()
                 .is_enabled()

crates/ruff_python_formatter/src/statement/stmt_try.rs

@@ -9,7 +9,7 @@ use crate::other::except_handler_except_handler::{
     ExceptHandlerKind, FormatExceptHandlerExceptHandler,
 };
 use crate::prelude::*;
-use crate::statement::clause::{ClauseHeader, ElseClause, clause_body, clause_header};
+use crate::statement::clause::{ClauseHeader, ElseClause, clause};
 use crate::statement::suite::SuiteKind;
 use crate::statement::{FormatRefWithRule, Stmt};
 
@@ -154,15 +154,14 @@ fn format_case<'a>(
 
         write!(
             f,
-            [
-                clause_header(header, trailing_case_comments, &token(kind.keyword()))
-                    .with_leading_comments(leading_case_comments, previous_node),
-                clause_body(
-                    body,
-                    SuiteKind::other(last_suite_in_statement),
-                    trailing_case_comments
-                ),
-            ]
+            [clause(
+                header,
+                &token(kind.keyword()),
+                trailing_case_comments,
+                body,
+                SuiteKind::other(last_suite_in_statement),
+            )
+            .with_leading_comments(leading_case_comments, previous_node),]
         )?;
         (Some(last), rest)
     } else {

crates/ruff_python_formatter/src/statement/stmt_while.rs

@@ -5,7 +5,7 @@ use ruff_text_size::Ranged;
 use crate::expression::maybe_parenthesize_expression;
 use crate::expression::parentheses::Parenthesize;
 use crate::prelude::*;
-use crate::statement::clause::{ClauseHeader, ElseClause, clause_body, clause_header};
+use crate::statement::clause::{ClauseHeader, ElseClause, clause};
 use crate::statement::suite::SuiteKind;
 
 #[derive(Default)]
@@ -33,22 +33,17 @@ impl FormatNodeRule<StmtWhile> for FormatStmtWhile {
 
         write!(
             f,
-            [
-                clause_header(
-                    ClauseHeader::While(item),
-                    trailing_condition_comments,
-                    &format_args![
-                        token("while"),
-                        space(),
-                        maybe_parenthesize_expression(test, item, Parenthesize::IfBreaks),
-                    ]
-                ),
-                clause_body(
-                    body,
-                    SuiteKind::other(orelse.is_empty()),
-                    trailing_condition_comments
-                ),
-            ]
+            [clause(
+                ClauseHeader::While(item),
+                &format_args![
+                    token("while"),
+                    space(),
+                    maybe_parenthesize_expression(test, item, Parenthesize::IfBreaks),
+                ],
+                trailing_condition_comments,
+                body,
+                SuiteKind::other(orelse.is_empty()),
+            )]
         )?;
 
         if !orelse.is_empty() {
@@ -60,15 +55,14 @@ impl FormatNodeRule<StmtWhile> for FormatStmtWhile {
 
             write!(
                 f,
-                [
-                    clause_header(
-                        ClauseHeader::OrElse(ElseClause::While(item)),
-                        trailing,
-                        &token("else")
-                    )
-                    .with_leading_comments(leading, body.last()),
-                    clause_body(orelse, SuiteKind::other(true), trailing),
-                ]
+                [clause(
+                    ClauseHeader::OrElse(ElseClause::While(item)),
+                    &token("else"),
+                    trailing,
+                    orelse,
+                    SuiteKind::other(true),
+                )
+                .with_leading_comments(leading, body.last()),]
             )?;
         }
 

crates/ruff_python_formatter/src/statement/stmt_with.rs

@@ -13,7 +13,7 @@ use crate::expression::parentheses::{
 use crate::other::commas;
 use crate::other::with_item::WithItemLayout;
 use crate::prelude::*;
-use crate::statement::clause::{ClauseHeader, clause_body, clause_header};
+use crate::statement::clause::{ClauseHeader, clause};
 use crate::statement::suite::SuiteKind;
 
 #[derive(Default)]
@@ -46,106 +46,103 @@ impl FormatNodeRule<StmtWith> for FormatStmtWith {
 
         write!(
             f,
-            [
-                clause_header(
-                    ClauseHeader::With(with_stmt),
-                    colon_comments,
-                    &format_with(|f| {
-                        write!(
-                            f,
-                            [
-                                with_stmt
-                                    .is_async
-                                    .then_some(format_args![token("async"), space()]),
-                                token("with"),
-                                space()
-                            ]
-                        )?;
+            [clause(
+                ClauseHeader::With(with_stmt),
+                &format_with(|f| {
+                    write!(
+                        f,
+                        [
+                            with_stmt
+                                .is_async
+                                .then_some(format_args![token("async"), space()]),
+                            token("with"),
+                            space()
+                        ]
+                    )?;
 
-                        let layout = WithItemsLayout::from_statement(
-                            with_stmt,
-                            f.context(),
-                            parenthesized_comments,
-                        )?;
+                    let layout = WithItemsLayout::from_statement(
+                        with_stmt,
+                        f.context(),
+                        parenthesized_comments,
+                    )?;
 
-                        match layout {
-                            WithItemsLayout::SingleWithTarget(single) => {
-                                optional_parentheses(&single.format().with_options(
-                                    WithItemLayout::ParenthesizedContextManagers { single: true },
-                                ))
-                                .fmt(f)
-                            }
-
-                            WithItemsLayout::SingleWithoutTarget(single) => single
-                                .format()
-                                .with_options(WithItemLayout::SingleWithoutTarget)
-                                .fmt(f),
-
-                            WithItemsLayout::SingleParenthesizedContextManager(single) => single
-                                .format()
-                                .with_options(WithItemLayout::SingleParenthesizedContextManager)
-                                .fmt(f),
-
-                            WithItemsLayout::ParenthesizeIfExpands => {
-                                parenthesize_if_expands(&format_with(|f| {
-                                    let mut joiner = f.join_comma_separated(
-                                        with_stmt.body.first().unwrap().start(),
-                                    );
-
-                                    for item in &with_stmt.items {
-                                        joiner.entry_with_line_separator(
-                                            item,
-                                            &item.format().with_options(
-                                                WithItemLayout::ParenthesizedContextManagers {
-                                                    single: with_stmt.items.len() == 1,
-                                                },
-                                            ),
-                                            soft_line_break_or_space(),
-                                        );
-                                    }
-                                    joiner.finish()
-                                }))
-                                .fmt(f)
-                            }
-
-                            WithItemsLayout::Python38OrOlder => f
-                                .join_with(format_args![token(","), space()])
-                                .entries(with_stmt.items.iter().map(|item| {
-                                    item.format().with_options(WithItemLayout::Python38OrOlder {
-                                        single: with_stmt.items.len() == 1,
-                                    })
-                                }))
-                                .finish(),
-
-                            WithItemsLayout::Parenthesized => parenthesized(
-                                "(",
-                                &format_with(|f: &mut PyFormatter| {
-                                    let mut joiner = f.join_comma_separated(
-                                        with_stmt.body.first().unwrap().start(),
-                                    );
-
-                                    for item in &with_stmt.items {
-                                        joiner.entry(
-                                            item,
-                                            &item.format().with_options(
-                                                WithItemLayout::ParenthesizedContextManagers {
-                                                    single: with_stmt.items.len() == 1,
-                                                },
-                                            ),
-                                        );
-                                    }
-
-                                    joiner.finish()
-                                }),
-                                ")",
-                            )
-                            .with_dangling_comments(parenthesized_comments)
-                            .fmt(f),
+                    match layout {
+                        WithItemsLayout::SingleWithTarget(single) => {
+                            optional_parentheses(&single.format().with_options(
+                                WithItemLayout::ParenthesizedContextManagers { single: true },
+                            ))
+                            .fmt(f)
                         }
-                    })
-                ),
-                clause_body(&with_stmt.body, SuiteKind::other(true), colon_comments)
-            ]
+
+                        WithItemsLayout::SingleWithoutTarget(single) => single
+                            .format()
+                            .with_options(WithItemLayout::SingleWithoutTarget)
+                            .fmt(f),
+
+                        WithItemsLayout::SingleParenthesizedContextManager(single) => single
+                            .format()
+                            .with_options(WithItemLayout::SingleParenthesizedContextManager)
+                            .fmt(f),
+
+                        WithItemsLayout::ParenthesizeIfExpands => {
+                            parenthesize_if_expands(&format_with(|f| {
+                                let mut joiner =
+                                    f.join_comma_separated(with_stmt.body.first().unwrap().start());
+
+                                for item in &with_stmt.items {
+                                    joiner.entry_with_line_separator(
+                                        item,
+                                        &item.format().with_options(
+                                            WithItemLayout::ParenthesizedContextManagers {
+                                                single: with_stmt.items.len() == 1,
+                                            },
+                                        ),
+                                        soft_line_break_or_space(),
+                                    );
+                                }
+                                joiner.finish()
+                            }))
+                            .fmt(f)
+                        }
+
+                        WithItemsLayout::Python38OrOlder => f
+                            .join_with(format_args![token(","), space()])
+                            .entries(with_stmt.items.iter().map(|item| {
+                                item.format().with_options(WithItemLayout::Python38OrOlder {
+                                    single: with_stmt.items.len() == 1,
+                                })
+                            }))
+                            .finish(),
+
+                        WithItemsLayout::Parenthesized => parenthesized(
+                            "(",
+                            &format_with(|f: &mut PyFormatter| {
+                                let mut joiner =
+                                    f.join_comma_separated(with_stmt.body.first().unwrap().start());
+
+                                for item in &with_stmt.items {
+                                    joiner.entry(
+                                        item,
+                                        &item.format().with_options(
+                                            WithItemLayout::ParenthesizedContextManagers {
+                                                single: with_stmt.items.len() == 1,
+                                            },
+                                        ),
+                                    );
+                                }
+
+                                joiner.finish()
+                            }),
+                            ")",
+                        )
+                        .with_dangling_comments(parenthesized_comments)
+                        .fmt(f),
+                    }
+                }),
+                colon_comments,
+                &with_stmt.body,
+                SuiteKind::other(true),
+            )]
         )
     }
 }

crates/ruff_python_formatter/tests/snapshots/black_compatibility@cases__fmtskip10.py.snap

@@ -20,24 +20,16 @@ b = [c for c in "A very long string that would normally generate some kind of co
 ```diff
 --- Black
 +++ Ruff
-@@ -1,8 +1,14 @@
--def foo(): return "mock"  # fmt: skip
--if True: print("yay")  # fmt: skip
--for i in range(10): print(i)  # fmt: skip
-+def foo():
-+    return "mock"  # fmt: skip
+@@ -1,8 +1,10 @@
+ def foo(): return "mock"  # fmt: skip
 +
 +
-+if True:
-+    print("yay")  # fmt: skip
-+for i in range(10):
-+    print(i)  # fmt: skip
+ if True: print("yay")  # fmt: skip
+ for i in range(10): print(i)  # fmt: skip
  
 -j =     1 # fmt: skip
--while j < 10: j += 1  # fmt: skip
 +j =     1  # fmt: skip
-+while j < 10:
-+    j += 1  # fmt: skip
+ while j < 10: j += 1  # fmt: skip
  
 -b = [c for c in "A very long string that would normally generate some kind of collapse, since it is this long"] # fmt: skip
 +b = [c for c in "A very long string that would normally generate some kind of collapse, since it is this long"]  # fmt: skip
@@ -46,18 +38,14 @@ b = [c for c in "A very long string that would normally generate some kind of co
 ## Ruff Output
 
 ```python
-def foo():
-    return "mock"  # fmt: skip
+def foo(): return "mock"  # fmt: skip
 
 
-if True:
-    print("yay")  # fmt: skip
-for i in range(10):
-    print(i)  # fmt: skip
+if True: print("yay")  # fmt: skip
+for i in range(10): print(i)  # fmt: skip
 
 j =     1  # fmt: skip
-while j < 10:
-    j += 1  # fmt: skip
+while j < 10: j += 1  # fmt: skip
 
 b = [c for c in "A very long string that would normally generate some kind of collapse, since it is this long"]  # fmt: skip
 ```

crates/ruff_python_formatter/tests/snapshots/format@expression__unary.py.snap

@@ -1,7 +1,6 @@
 ---
 source: crates/ruff_python_formatter/tests/fixtures.rs
 input_file: crates/ruff_python_formatter/resources/test/fixtures/ruff/expression/unary.py
-snapshot_kind: text
 ---
 ## Input
 ```python
@@ -200,6 +199,61 @@ def foo():
         not (aaaaaaaaaaaaaaaaaaaaa[bbbbbbbb, ccccccc]) and dddddddddd < eeeeeeeeeeeeeee
     ):
         pass
+
+# Regression tests for https://github.com/astral-sh/ruff/issues/19226
+if '' and (not #
+0):
+    pass
+
+if '' and (not #
+(0)
+):
+    pass
+
+if '' and (not
+	(  #
+	0
+)):
+    pass
+
+if (
+  not
+  # comment
+  (a)):
+    pass
+
+if not ( # comment
+      a):
+    pass
+
+if not (
+  # comment
+  (a)):
+    pass
+
+if not (
+  # comment
+  a):
+    pass
+
+not (# comment
+  (a))
+
+(-#comment
+ (a))
+
+if ( # a
+        # b
+  not # c
+  # d
+  ( # e
+      # f
+      a # g
+      # h
+  ) # i
+  # j
+):
+    pass
 ```
 
 ## Output
@@ -250,31 +304,35 @@ if +(
     pass
 
 if (
+    not
     # comment
-    not aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
     + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
 ):
     pass
 
 
 if (
+    ~
     # comment
-    ~aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
     + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
 ):
     pass
 
 if (
+    -
     # comment
-    -aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
     + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
 ):
     pass
 
 
 if (
+    +
     # comment
-    +aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
     + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
 ):
     pass
@@ -283,8 +341,9 @@ if (
 
 if (
     # unary comment
+    not
     # operand comment
-    not (
+    (
         # comment
         aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
         + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
@@ -318,31 +377,28 @@ if (
 
 ## Trailing operator comments
 
-if (  # comment
-    not aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+if (
+    not aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa  # comment
     + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
 ):
     pass
 
 
 if (
-    # comment
-    ~aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+    ~aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa  # comment
     + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
 ):
     pass
 
 if (
-    # comment
-    -aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+    -aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa  # comment
     + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
 ):
     pass
 
 
 if (
-    # comment
-    +aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+    +aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa  # comment
     + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
 ):
     pass
@@ -362,14 +418,13 @@ if (
     pass
 
 if (
+    not
     # comment
-    not a
+    a
 ):
     pass
 
-if (  # comment
-    not a
-):
+if not a:  # comment
     pass
 
 # Regression test for: https://github.com/astral-sh/ruff/issues/7423
@@ -385,9 +440,9 @@ if True:
 # Regression test for: https://github.com/astral-sh/ruff/issues/7448
 x = (
     # a
-    # b
+    not  # b
     # c
-    not (  # d
+    (  # d
         # e
         True
     )
@@ -415,4 +470,68 @@ def foo():
         not (aaaaaaaaaaaaaaaaaaaaa[bbbbbbbb, ccccccc]) and dddddddddd < eeeeeeeeeeeeeee
     ):
         pass
+
+
+# Regression tests for https://github.com/astral-sh/ruff/issues/19226
+if "" and (
+    not 0  #
+):
+    pass
+
+if "" and (
+    not (0)  #
+):
+    pass
+
+if "" and (
+    not (  #
+        0
+    )
+):
+    pass
+
+if (
+    not
+    # comment
+    (a)
+):
+    pass
+
+if not (  # comment
+    a
+):
+    pass
+
+if not (
+    # comment
+    a
+):
+    pass
+
+if not (
+    # comment
+    a
+):
+    pass
+
+not (  # comment
+    a
+)
+
+(
+    -(a)  # comment
+)
+
+if (  # a
+    # b
+    not  # c
+    # d
+    (  # e
+        # f
+        a  # g
+        # h
+    )  # i
+    # j
+):
+    pass
 ```

crates/ruff_python_formatter/tests/snapshots/format@fmt_skip__compound_one_liners.py.snap

@@ -0,0 +1,341 @@
+---
+source: crates/ruff_python_formatter/tests/fixtures.rs
+input_file: crates/ruff_python_formatter/resources/test/fixtures/ruff/fmt_skip/compound_one_liners.py
+---
+## Input
+```python
+# Test cases for fmt: skip on compound statements that fit on one line
+
+# Basic single-line compound statements
+def simple_func(): return "hello"  # fmt: skip
+if True: print("condition met")  # fmt: skip
+for i in range(5): print(i)  # fmt: skip
+while x < 10: x += 1  # fmt: skip
+
+# With expressions that would normally trigger formatting
+def long_params(a, b, c, d, e, f, g): return a + b + c + d + e + f + g  # fmt: skip
+if some_very_long_condition_that_might_wrap: do_something_else_that_is_long()  # fmt: skip
+
+# Nested compound statements (outer should be preserved)
+if True:
+    for i in range(10): print(i)  # fmt: skip
+
+# Multiple statements in body (should not apply - multiline)
+if True:
+    x = 1
+    y   =   2  # fmt: skip
+
+# With decorators - decorated function on one line
+@overload
+def decorated_func(x: int) -> str: return str(x)  # fmt: skip
+
+@property
+def prop_method(self): return self._value  # fmt: skip
+
+# Class definitions on one line
+class SimpleClass: pass  # fmt: skip
+class GenericClass(Generic[T]): pass  # fmt: skip
+
+# Try/except blocks
+try: risky_operation()  # fmt: skip
+except ValueError: handle_error()  # fmt: skip
+except: handle_any_error()  # fmt: skip
+else: success_case()  # fmt: skip
+finally: cleanup()  # fmt: skip
+
+# Match statements (Python 3.10+)
+match value:
+    case 1: print("one")  # fmt: skip
+    case _: print("other")  # fmt: skip
+
+# With statements
+with open("file.txt") as f: content = f.read()  # fmt: skip
+with context_manager() as cm: result = cm.process()  # fmt: skip
+
+# Async variants
+async def async_func(): return await some_call()  # fmt: skip
+async for item in async_iterator(): await process(item)  # fmt: skip
+async with async_context() as ctx: await ctx.work()  # fmt: skip
+
+# Complex expressions that would normally format
+def complex_expr(): return [x for x in range(100) if x % 2 == 0 and x > 50]  # fmt: skip
+if condition_a and condition_b or (condition_c and not condition_d): execute_complex_logic()  # fmt: skip
+
+# Edge case: comment positioning
+def func_with_comment():  # some comment
+    return "value"  # fmt: skip
+
+# Edge case: multiple fmt: skip (only last one should matter)
+def multiple_skip(): return "test"  # fmt: skip  # fmt: skip
+
+# Should NOT be affected (already multiline)
+def multiline_func():
+    return "this should format normally"
+
+if long_condition_that_spans \
+   and continues_on_next_line:
+    print("multiline condition")
+
+# Mix of skipped and non-skipped
+for i in range(10): print(f"item {i}")  # fmt: skip
+for j in range(5):
+    print(f"formatted item {j}")
+
+# With trailing comma that would normally be removed
+def trailing_comma_func(a, b, c,): return a + b + c  # fmt: skip
+
+# Dictionary/list comprehensions
+def dict_comp(): return {k: v for k, v in items.items() if v is not None}  # fmt: skip
+def list_comp(): return [x * 2 for x in numbers if x > threshold_value]  # fmt: skip
+
+# Lambda in one-liner
+def with_lambda(): return lambda x, y, z: x + y + z if all([x, y, z]) else None  # fmt: skip
+
+# String formatting that would normally be reformatted
+def format_string(): return f"Hello {name}, you have {count} items in your cart totaling ${total:.2f}"  # fmt: skip
+
+# loop else clauses
+for i in range(2): print(i) # fmt: skip
+else: print("this") # fmt: skip
+
+
+while foo(): print(i) # fmt: skip
+else: print("this") # fmt: skip
+
+# again but only the first skip
+for i in range(2): print(i) # fmt: skip
+else: print("this")
+
+
+while foo(): print(i) # fmt: skip
+else: print("this")
+
+# again but only the second skip
+for i in range(2): print(i)
+else: print("this") # fmt: skip
+
+
+while foo(): print(i)
+else: print("this") # fmt: skip
+
+# multiple statements in body
+if True: print("this"); print("that") # fmt: skip
+
+# Examples with more comments
+
+try: risky_operation()  # fmt: skip
+# leading 1
+except ValueError: handle_error()  # fmt: skip
+# leading 2
+except: handle_any_error()  # fmt: skip
+# leading 3
+else: success_case()  # fmt: skip
+# leading 4
+finally: cleanup()  # fmt: skip
+# trailing
+
+# multi-line before colon (should remain as is)
+if (
+	long_condition
+):  a     +     b # fmt: skip
+
+# over-indented comment example
+# See https://github.com/astral-sh/ruff/pull/20633#issuecomment-3453288910
+# and https://github.com/astral-sh/ruff/pull/21185
+
+for x in it: foo()
+    # comment
+else: bar() # fmt: skip
+
+
+if this(
+    'is a long',
+    # commented
+    'condition'
+): with_a_skip # fmt: skip
+```
+
+## Output
+```python
+# Test cases for fmt: skip on compound statements that fit on one line
+
+# Basic single-line compound statements
+def simple_func(): return "hello"  # fmt: skip
+
+
+if True: print("condition met")  # fmt: skip
+for i in range(5): print(i)  # fmt: skip
+while x < 10: x += 1  # fmt: skip
+
+
+# With expressions that would normally trigger formatting
+def long_params(a, b, c, d, e, f, g): return a + b + c + d + e + f + g  # fmt: skip
+
+
+if some_very_long_condition_that_might_wrap: do_something_else_that_is_long()  # fmt: skip
+
+# Nested compound statements (outer should be preserved)
+if True:
+    for i in range(10): print(i)  # fmt: skip
+
+# Multiple statements in body (should not apply - multiline)
+if True:
+    x = 1
+    y   =   2  # fmt: skip
+
+
+# With decorators - decorated function on one line
+@overload
+def decorated_func(x: int) -> str: return str(x)  # fmt: skip
+
+
+@property
+def prop_method(self): return self._value  # fmt: skip
+
+
+# Class definitions on one line
+class SimpleClass: pass  # fmt: skip
+
+
+class GenericClass(Generic[T]): pass  # fmt: skip
+
+
+# Try/except blocks
+try: risky_operation()  # fmt: skip
+except ValueError: handle_error()  # fmt: skip
+except: handle_any_error()  # fmt: skip
+else: success_case()  # fmt: skip
+finally: cleanup()  # fmt: skip
+
+# Match statements (Python 3.10+)
+match value:
+    case 1: print("one")  # fmt: skip
+    case _: print("other")  # fmt: skip
+
+# With statements
+with open("file.txt") as f: content = f.read()  # fmt: skip
+with context_manager() as cm: result = cm.process()  # fmt: skip
+
+
+# Async variants
+async def async_func(): return await some_call()  # fmt: skip
+
+
+async for item in async_iterator(): await process(item)  # fmt: skip
+async with async_context() as ctx: await ctx.work()  # fmt: skip
+
+
+# Complex expressions that would normally format
+def complex_expr(): return [x for x in range(100) if x % 2 == 0 and x > 50]  # fmt: skip
+
+
+if condition_a and condition_b or (condition_c and not condition_d): execute_complex_logic()  # fmt: skip
+
+
+# Edge case: comment positioning
+def func_with_comment():  # some comment
+    return "value"  # fmt: skip
+
+
+# Edge case: multiple fmt: skip (only last one should matter)
+def multiple_skip(): return "test"  # fmt: skip  # fmt: skip
+
+
+# Should NOT be affected (already multiline)
+def multiline_func():
+    return "this should format normally"
+
+
+if long_condition_that_spans and continues_on_next_line:
+    print("multiline condition")
+
+# Mix of skipped and non-skipped
+for i in range(10): print(f"item {i}")  # fmt: skip
+for j in range(5):
+    print(f"formatted item {j}")
+
+
+# With trailing comma that would normally be removed
+def trailing_comma_func(a, b, c,): return a + b + c  # fmt: skip
+
+
+# Dictionary/list comprehensions
+def dict_comp(): return {k: v for k, v in items.items() if v is not None}  # fmt: skip
+
+
+def list_comp(): return [x * 2 for x in numbers if x > threshold_value]  # fmt: skip
+
+
+# Lambda in one-liner
+def with_lambda(): return lambda x, y, z: x + y + z if all([x, y, z]) else None  # fmt: skip
+
+
+# String formatting that would normally be reformatted
+def format_string(): return f"Hello {name}, you have {count} items in your cart totaling ${total:.2f}"  # fmt: skip
+
+
+# loop else clauses
+for i in range(2): print(i)  # fmt: skip
+else: print("this")  # fmt: skip
+
+
+while foo(): print(i)  # fmt: skip
+else: print("this")  # fmt: skip
+
+# again but only the first skip
+for i in range(2): print(i)  # fmt: skip
+else:
+    print("this")
+
+
+while foo(): print(i)  # fmt: skip
+else:
+    print("this")
+
+# again but only the second skip
+for i in range(2):
+    print(i)
+else: print("this")  # fmt: skip
+
+
+while foo():
+    print(i)
+else: print("this")  # fmt: skip
+
+# multiple statements in body
+if True: print("this"); print("that")  # fmt: skip
+
+# Examples with more comments
+
+try: risky_operation()  # fmt: skip
+# leading 1
+except ValueError: handle_error()  # fmt: skip
+# leading 2
+except: handle_any_error()  # fmt: skip
+# leading 3
+else: success_case()  # fmt: skip
+# leading 4
+finally: cleanup()  # fmt: skip
+# trailing
+
+# multi-line before colon (should remain as is)
+if (
+	long_condition
+):  a     +     b  # fmt: skip
+
+# over-indented comment example
+# See https://github.com/astral-sh/ruff/pull/20633#issuecomment-3453288910
+# and https://github.com/astral-sh/ruff/pull/21185
+
+for x in it:
+    foo()
+# comment
+else: bar()  # fmt: skip
+
+
+if this(
+    'is a long',
+    # commented
+    'condition'
+): with_a_skip  # fmt: skip
+```

crates/ruff_python_formatter/tests/snapshots/format@fmt_skip__docstrings.py.snap

@@ -1,7 +1,6 @@
 ---
 source: crates/ruff_python_formatter/tests/fixtures.rs
 input_file: crates/ruff_python_formatter/resources/test/fixtures/ruff/fmt_skip/docstrings.py
-snapshot_kind: text
 ---
 ## Input
 ```python

crates/ruff_python_formatter/tests/snapshots/format@parentheses__expression_parentheses_comments.py.snap

@@ -1,7 +1,6 @@
 ---
 source: crates/ruff_python_formatter/tests/fixtures.rs
 input_file: crates/ruff_python_formatter/resources/test/fixtures/ruff/parentheses/expression_parentheses_comments.py
-snapshot_kind: text
 ---
 ## Input
 ```python
@@ -179,13 +178,13 @@ nested_parentheses4 = [
 
 x = (
     # unary comment
+    not
     # in-between comment
-    not (
+    (
         # leading inner
         "a"
     ),
-    # in-between comment
-    not (
+    not (  # in-between comment
         # leading inner
         "b"
     ),
@@ -194,8 +193,7 @@ x = (
         "c"
     ),
     # 1
-    # 2
-    not (  # 3
+    not (  # 2  # 3
         # 4
         "d"
     ),
@@ -203,8 +201,9 @@ x = (
 
 if (
     # unary comment
+    not
     # in-between comment
-    not (
+    (
         # leading inner
         1
     )

crates/ruff_python_parser/resources/inline/err/ipython_help_escape_command_error_recovery_1.py

@@ -0,0 +1,3 @@
+# parse_options: {"mode": "ipython"}
+with (a, ?b)
+?

crates/ruff_python_parser/resources/inline/err/ipython_help_escape_command_error_recovery_2.py

@@ -0,0 +1,3 @@
+# parse_options: {"mode": "ipython"}
+with (a, ?b
+?

crates/ruff_python_parser/resources/inline/err/ipython_help_escape_command_error_recovery_3.py

@@ -0,0 +1,4 @@
+# parse_options: {"mode": "ipython"}
+with a, ?b
+?
+x = 1

crates/ruff_python_parser/src/parser/mod.rs

@@ -1115,7 +1115,27 @@ impl RecoveryContextKind {
                     TokenKind::Colon => Some(ListTerminatorKind::ErrorRecovery),
                     _ => None,
                 },
-                WithItemKind::Unparenthesized | WithItemKind::ParenthesizedExpression => p
+                // test_err ipython_help_escape_command_error_recovery_1
+                // # parse_options: {"mode": "ipython"}
+                // with (a, ?b)
+                // ?
+
+                // test_err ipython_help_escape_command_error_recovery_2
+                // # parse_options: {"mode": "ipython"}
+                // with (a, ?b
+                // ?
+
+                // test_err ipython_help_escape_command_error_recovery_3
+                // # parse_options: {"mode": "ipython"}
+                // with a, ?b
+                // ?
+                // x = 1
+                WithItemKind::Unparenthesized => matches!(
+                    p.current_token_kind(),
+                    TokenKind::Colon | TokenKind::Newline
+                )
+                .then_some(ListTerminatorKind::Regular),
+                WithItemKind::ParenthesizedExpression => p
                     .at(TokenKind::Colon)
                     .then_some(ListTerminatorKind::Regular),
             },

crates/ruff_python_parser/tests/snapshots/invalid_syntax@ipython_help_escape_command_error_recovery_1.py.snap

@@ -0,0 +1,84 @@
+---
+source: crates/ruff_python_parser/tests/fixtures.rs
+input_file: crates/ruff_python_parser/resources/inline/err/ipython_help_escape_command_error_recovery_1.py
+---
+## AST
+
+```
+Module(
+    ModModule {
+        node_index: NodeIndex(None),
+        range: 0..52,
+        body: [
+            With(
+                StmtWith {
+                    node_index: NodeIndex(None),
+                    range: 37..49,
+                    is_async: false,
+                    items: [
+                        WithItem {
+                            range: 43..44,
+                            node_index: NodeIndex(None),
+                            context_expr: Name(
+                                ExprName {
+                                    node_index: NodeIndex(None),
+                                    range: 43..44,
+                                    id: Name("a"),
+                                    ctx: Load,
+                                },
+                            ),
+                            optional_vars: None,
+                        },
+                        WithItem {
+                            range: 47..48,
+                            node_index: NodeIndex(None),
+                            context_expr: Name(
+                                ExprName {
+                                    node_index: NodeIndex(None),
+                                    range: 47..48,
+                                    id: Name("b"),
+                                    ctx: Load,
+                                },
+                            ),
+                            optional_vars: None,
+                        },
+                    ],
+                    body: [],
+                },
+            ),
+            IpyEscapeCommand(
+                StmtIpyEscapeCommand {
+                    node_index: NodeIndex(None),
+                    range: 50..51,
+                    kind: Help,
+                    value: "",
+                },
+            ),
+        ],
+    },
+)
+```
+## Errors
+
+  |
+1 | # parse_options: {"mode": "ipython"}
+2 | with (a, ?b)
+  |          ^ Syntax Error: Expected `,`, found `?`
+3 | ?
+  |
+
+
+  |
+1 | # parse_options: {"mode": "ipython"}
+2 | with (a, ?b)
+  |             ^ Syntax Error: Expected `:`, found newline
+3 | ?
+  |
+
+
+  |
+1 | # parse_options: {"mode": "ipython"}
+2 | with (a, ?b)
+3 | ?
+  | ^ Syntax Error: Expected an indented block after `with` statement
+  |

crates/ruff_python_parser/tests/snapshots/invalid_syntax@ipython_help_escape_command_error_recovery_2.py.snap

@@ -0,0 +1,80 @@
+---
+source: crates/ruff_python_parser/tests/fixtures.rs
+input_file: crates/ruff_python_parser/resources/inline/err/ipython_help_escape_command_error_recovery_2.py
+---
+## AST
+
+```
+Module(
+    ModModule {
+        node_index: NodeIndex(None),
+        range: 0..51,
+        body: [
+            With(
+                StmtWith {
+                    node_index: NodeIndex(None),
+                    range: 37..51,
+                    is_async: false,
+                    items: [
+                        WithItem {
+                            range: 42..51,
+                            node_index: NodeIndex(None),
+                            context_expr: Tuple(
+                                ExprTuple {
+                                    node_index: NodeIndex(None),
+                                    range: 42..51,
+                                    elts: [
+                                        Name(
+                                            ExprName {
+                                                node_index: NodeIndex(None),
+                                                range: 43..44,
+                                                id: Name("a"),
+                                                ctx: Load,
+                                            },
+                                        ),
+                                        Name(
+                                            ExprName {
+                                                node_index: NodeIndex(None),
+                                                range: 47..48,
+                                                id: Name("b"),
+                                                ctx: Load,
+                                            },
+                                        ),
+                                    ],
+                                    ctx: Load,
+                                    parenthesized: true,
+                                },
+                            ),
+                            optional_vars: None,
+                        },
+                    ],
+                    body: [],
+                },
+            ),
+        ],
+    },
+)
+```
+## Errors
+
+  |
+1 | # parse_options: {"mode": "ipython"}
+2 | with (a, ?b
+  |          ^ Syntax Error: Expected an expression or a ')'
+3 | ?
+  |
+
+
+  |
+1 | # parse_options: {"mode": "ipython"}
+2 | with (a, ?b
+3 | ?
+  | ^ Syntax Error: Expected `,`, found `?`
+  |
+
+
+  |
+2 | with (a, ?b
+3 | ?
+  |  ^ Syntax Error: unexpected EOF while parsing
+  |

crates/ruff_python_parser/tests/snapshots/invalid_syntax@ipython_help_escape_command_error_recovery_3.py.snap

@@ -0,0 +1,112 @@
+---
+source: crates/ruff_python_parser/tests/fixtures.rs
+input_file: crates/ruff_python_parser/resources/inline/err/ipython_help_escape_command_error_recovery_3.py
+---
+## AST
+
+```
+Module(
+    ModModule {
+        node_index: NodeIndex(None),
+        range: 0..56,
+        body: [
+            With(
+                StmtWith {
+                    node_index: NodeIndex(None),
+                    range: 37..47,
+                    is_async: false,
+                    items: [
+                        WithItem {
+                            range: 42..43,
+                            node_index: NodeIndex(None),
+                            context_expr: Name(
+                                ExprName {
+                                    node_index: NodeIndex(None),
+                                    range: 42..43,
+                                    id: Name("a"),
+                                    ctx: Load,
+                                },
+                            ),
+                            optional_vars: None,
+                        },
+                        WithItem {
+                            range: 46..47,
+                            node_index: NodeIndex(None),
+                            context_expr: Name(
+                                ExprName {
+                                    node_index: NodeIndex(None),
+                                    range: 46..47,
+                                    id: Name("b"),
+                                    ctx: Load,
+                                },
+                            ),
+                            optional_vars: None,
+                        },
+                    ],
+                    body: [],
+                },
+            ),
+            IpyEscapeCommand(
+                StmtIpyEscapeCommand {
+                    node_index: NodeIndex(None),
+                    range: 48..49,
+                    kind: Help,
+                    value: "",
+                },
+            ),
+            Assign(
+                StmtAssign {
+                    node_index: NodeIndex(None),
+                    range: 50..55,
+                    targets: [
+                        Name(
+                            ExprName {
+                                node_index: NodeIndex(None),
+                                range: 50..51,
+                                id: Name("x"),
+                                ctx: Store,
+                            },
+                        ),
+                    ],
+                    value: NumberLiteral(
+                        ExprNumberLiteral {
+                            node_index: NodeIndex(None),
+                            range: 54..55,
+                            value: Int(
+                                1,
+                            ),
+                        },
+                    ),
+                },
+            ),
+        ],
+    },
+)
+```
+## Errors
+
+  |
+1 | # parse_options: {"mode": "ipython"}
+2 | with a, ?b
+  |         ^ Syntax Error: Expected `,`, found `?`
+3 | ?
+4 | x = 1
+  |
+
+
+  |
+1 | # parse_options: {"mode": "ipython"}
+2 | with a, ?b
+  |           ^ Syntax Error: Expected `:`, found newline
+3 | ?
+4 | x = 1
+  |
+
+
+  |
+1 | # parse_options: {"mode": "ipython"}
+2 | with a, ?b
+3 | ?
+  | ^ Syntax Error: Expected an indented block after `with` statement
+4 | x = 1
+  |

crates/ruff_server/src/lint.rs

@@ -283,27 +283,30 @@ fn to_lsp_diagnostic(
         range = diagnostic_range.to_range(source_kind.source_code(), index, encoding);
     }
 
-    let (severity, tags, code) = if let Some(code) = code {
-        let code = code.to_string();
-        (
-            Some(severity(&code)),
-            tags(diagnostic),
-            Some(lsp_types::NumberOrString::String(code)),
-        )
+    let (severity, code) = if let Some(code) = code {
+        (severity(code), code.to_string())
     } else {
-        (None, None, None)
+        (
+            match diagnostic.severity() {
+                ruff_db::diagnostic::Severity::Info => lsp_types::DiagnosticSeverity::INFORMATION,
+                ruff_db::diagnostic::Severity::Warning => lsp_types::DiagnosticSeverity::WARNING,
+                ruff_db::diagnostic::Severity::Error => lsp_types::DiagnosticSeverity::ERROR,
+                ruff_db::diagnostic::Severity::Fatal => lsp_types::DiagnosticSeverity::ERROR,
+            },
+            diagnostic.id().to_string(),
+        )
     };
 
     (
         cell,
         lsp_types::Diagnostic {
             range,
-            severity,
-            tags,
-            code,
-            code_description: diagnostic.to_ruff_url().and_then(|url| {
+            severity: Some(severity),
+            tags: tags(diagnostic),
+            code: Some(lsp_types::NumberOrString::String(code)),
+            code_description: diagnostic.documentation_url().and_then(|url| {
                 Some(lsp_types::CodeDescription {
-                    href: lsp_types::Url::parse(&url).ok()?,
+                    href: lsp_types::Url::parse(url).ok()?,
                 })
             }),
             source: Some(DIAGNOSTIC_NAME.into()),

crates/ruff_text_size/src/size.rs

@@ -106,6 +106,25 @@ impl TextSize {
     pub fn checked_sub(self, rhs: TextSize) -> Option<TextSize> {
         self.raw.checked_sub(rhs.raw).map(|raw| TextSize { raw })
     }
+
+    /// Saturating addition. Returns maximum `TextSize` if overflow occurred.
+    #[inline]
+    #[must_use]
+    pub fn saturating_add(self, rhs: TextSize) -> TextSize {
+        TextSize {
+            raw: self.raw.saturating_add(rhs.raw),
+        }
+    }
+
+    /// Saturating subtraction. Returns minimum `TextSize` if overflow
+    /// occurred.
+    #[inline]
+    #[must_use]
+    pub fn saturating_sub(self, rhs: TextSize) -> TextSize {
+        TextSize {
+            raw: self.raw.saturating_sub(rhs.raw),
+        }
+    }
 }
 
 impl From<u32> for TextSize {

crates/ruff_wasm/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ruff_wasm"
-version = "0.14.5"
+version = "0.14.6"
 publish = false
 authors = { workspace = true }
 edition = { workspace = true }

crates/ty/docs/rules.md

@@ -39,7 +39,7 @@ def test(): -> "int":
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20call-non-callable" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L120" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L127" target="_blank">View source</a>
 </small>
 
 
@@ -63,7 +63,7 @@ Calling a non-callable object will raise a `TypeError` at runtime.
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20conflicting-argument-forms" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L164" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L171" target="_blank">View source</a>
 </small>
 
 
@@ -95,7 +95,7 @@ f(int)  # error
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20conflicting-declarations" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L190" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L197" target="_blank">View source</a>
 </small>
 
 
@@ -126,7 +126,7 @@ a = 1
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20conflicting-metaclass" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L215" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L222" target="_blank">View source</a>
 </small>
 
 
@@ -158,7 +158,7 @@ class C(A, B): ...
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20cyclic-class-definition" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L241" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L248" target="_blank">View source</a>
 </small>
 
 
@@ -190,7 +190,7 @@ class B(A): ...
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20duplicate-base" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L306" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L313" target="_blank">View source</a>
 </small>
 
 
@@ -217,7 +217,7 @@ class B(A, A): ...
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.12">0.0.1-alpha.12</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20duplicate-kw-only" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L327" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L334" target="_blank">View source</a>
 </small>
 
 
@@ -329,7 +329,7 @@ def test(): -> "Literal[5]":
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20inconsistent-mro" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L531" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L538" target="_blank">View source</a>
 </small>
 
 
@@ -359,7 +359,7 @@ class C(A, B): ...
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20index-out-of-bounds" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L555" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L562" target="_blank">View source</a>
 </small>
 
 
@@ -385,7 +385,7 @@ t[3]  # IndexError: tuple index out of range
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.12">0.0.1-alpha.12</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20instance-layout-conflict" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L359" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L366" target="_blank">View source</a>
 </small>
 
 
@@ -474,7 +474,7 @@ an atypical memory layout.
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-argument-type" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L609" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L616" target="_blank">View source</a>
 </small>
 
 
@@ -501,7 +501,7 @@ func("foo")  # error: [invalid-argument-type]
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-assignment" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L649" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L656" target="_blank">View source</a>
 </small>
 
 
@@ -529,7 +529,7 @@ a: int = ''
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-attribute-access" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1808" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1815" target="_blank">View source</a>
 </small>
 
 
@@ -563,7 +563,7 @@ C.instance_var = 3  # error: Cannot assign to instance variable
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.19">0.0.1-alpha.19</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-await" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L671" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L678" target="_blank">View source</a>
 </small>
 
 
@@ -599,7 +599,7 @@ asyncio.run(main())
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-base" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L701" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L708" target="_blank">View source</a>
 </small>
 
 
@@ -623,7 +623,7 @@ class A(42): ...  # error: [invalid-base]
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-context-manager" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L752" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L759" target="_blank">View source</a>
 </small>
 
 
@@ -650,7 +650,7 @@ with 1:
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-declaration" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L773" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L780" target="_blank">View source</a>
 </small>
 
 
@@ -679,7 +679,7 @@ a: str
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-exception-caught" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L796" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L803" target="_blank">View source</a>
 </small>
 
 
@@ -723,7 +723,7 @@ except ZeroDivisionError:
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-generic-class" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L832" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L839" target="_blank">View source</a>
 </small>
 
 
@@ -756,7 +756,7 @@ class C[U](Generic[T]): ...
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.17">0.0.1-alpha.17</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-key" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L576" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L583" target="_blank">View source</a>
 </small>
 
 
@@ -795,7 +795,7 @@ carol = Person(name="Carol", age=25)  # typo!
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-legacy-type-variable" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L858" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L865" target="_blank">View source</a>
 </small>
 
 
@@ -830,7 +830,7 @@ def f(t: TypeVar("U")): ...
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-metaclass" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L955" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L962" target="_blank">View source</a>
 </small>
 
 
@@ -858,13 +858,99 @@ class B(metaclass=f): ...
 
 - [Python documentation: Metaclasses](https://docs.python.org/3/reference/datamodel.html#metaclasses)
 
+## `invalid-method-override`
+
+<small>
+Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
+Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.20">0.0.1-alpha.20</a> ·
+<a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-method-override" target="_blank">Related issues</a> ·
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1943" target="_blank">View source</a>
+</small>
+
+
+**What it does**
+
+Detects method overrides that violate the [Liskov Substitution Principle] ("LSP").
+
+The LSP states that an instance of a subtype should be substitutable for an instance of its supertype.
+Applied to Python, this means:
+1. All argument combinations a superclass method accepts
+   must also be accepted by an overriding subclass method.
+2. The return type of an overriding subclass method must be a subtype
+   of the return type of the superclass method.
+
+**Why is this bad?**
+
+Violating the Liskov Substitution Principle will lead to many of ty's assumptions and
+inferences being incorrect, which will mean that it will fail to catch many possible
+type errors in your code.
+
+**Example**
+
+```python
+class Super:
+    def method(self, x) -> int:
+        return 42
+
+class Sub(Super):
+    # Liskov violation: `str` is not a subtype of `int`,
+    # but the supertype method promises to return an `int`.
+    def method(self, x) -> str:  # error: [invalid-override]
+        return "foo"
+
+def accepts_super(s: Super) -> int:
+    return s.method(x=42)
+
+accepts_super(Sub())  # The result of this call is a string, but ty will infer
+                      # it to be an `int` due to the violation of the Liskov Substitution Principle.
+
+class Sub2(Super):
+    # Liskov violation: the superclass method can be called with a `x=`
+    # keyword argument, but the subclass method does not accept it.
+    def method(self, y) -> int:  # error: [invalid-override]
+       return 42
+
+accepts_super(Sub2())  # TypeError at runtime: method() got an unexpected keyword argument 'x'
+                       # ty cannot catch this error due to the violation of the Liskov Substitution Principle.
+```
+
+**Common issues**
+
+
+**Why does ty complain about my `__eq__` method?**
+
+
+`__eq__` and `__ne__` methods in Python are generally expected to accept arbitrary
+objects as their second argument, for example:
+
+```python
+class A:
+    x: int
+
+    def __eq__(self, other: object) -> bool:
+        # gracefully handle an object of an unexpected type
+        # without raising an exception
+        if not isinstance(other, A):
+            return False
+        return self.x == other.x
+```
+
+If `A.__eq__` here were annotated as only accepting `A` instances for its second argument,
+it would imply that you wouldn't be able to use `==` between instances of `A` and
+instances of unrelated classes without an exception possibly being raised. While some
+classes in Python do indeed behave this way, the strongly held convention is that it should
+be avoided wherever possible. As part of this check, therefore, ty enforces that `__eq__`
+and `__ne__` methods accept `object` as their second argument.
+
+[Liskov Substitution Principle]: https://en.wikipedia.org/wiki/Liskov_substitution_principle
+
 ## `invalid-named-tuple`
 
 <small>
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.19">0.0.1-alpha.19</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-named-tuple" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L505" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L512" target="_blank">View source</a>
 </small>
 
 
@@ -896,7 +982,7 @@ TypeError: can only inherit from a NamedTuple type and Generic
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Preview (since <a href="https://github.com/astral-sh/ty/releases/tag/1.0.0">1.0.0</a>) ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-newtype" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L931" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L938" target="_blank">View source</a>
 </small>
 
 
@@ -926,7 +1012,7 @@ Baz = NewType("Baz", int | str)  # error: invalid base for `typing.NewType`
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-overload" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L982" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L989" target="_blank">View source</a>
 </small>
 
 
@@ -976,7 +1062,7 @@ def foo(x: int) -> int: ...
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-parameter-default" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1081" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1088" target="_blank">View source</a>
 </small>
 
 
@@ -1002,7 +1088,7 @@ def f(a: int = ''): ...
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-paramspec" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L886" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L893" target="_blank">View source</a>
 </small>
 
 
@@ -1033,7 +1119,7 @@ P2 = ParamSpec("S2")  # error: ParamSpec name must match the variable it's assig
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-protocol" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L441" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L448" target="_blank">View source</a>
 </small>
 
 
@@ -1067,7 +1153,7 @@ TypeError: Protocols can only inherit from other protocols, got <class 'int'>
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-raise" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1101" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1108" target="_blank">View source</a>
 </small>
 
 
@@ -1116,7 +1202,7 @@ def g():
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-return-type" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L630" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L637" target="_blank">View source</a>
 </small>
 
 
@@ -1141,7 +1227,7 @@ def func() -> int:
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-super-argument" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1144" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1151" target="_blank">View source</a>
 </small>
 
 
@@ -1199,7 +1285,7 @@ TODO #14889
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.6">0.0.1-alpha.6</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-type-alias-type" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L910" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L917" target="_blank">View source</a>
 </small>
 
 
@@ -1226,7 +1312,7 @@ NewAlias = TypeAliasType(get_name(), int)        # error: TypeAliasType name mus
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-type-checking-constant" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1183" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1190" target="_blank">View source</a>
 </small>
 
 
@@ -1256,7 +1342,7 @@ TYPE_CHECKING = ''
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-type-form" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1207" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1214" target="_blank">View source</a>
 </small>
 
 
@@ -1286,7 +1372,7 @@ b: Annotated[int]  # `Annotated` expects at least two arguments
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.11">0.0.1-alpha.11</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-type-guard-call" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1259" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1266" target="_blank">View source</a>
 </small>
 
 
@@ -1320,7 +1406,7 @@ f(10)  # Error
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.11">0.0.1-alpha.11</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-type-guard-definition" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1231" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1238" target="_blank">View source</a>
 </small>
 
 
@@ -1354,7 +1440,7 @@ class C:
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20invalid-type-variable-constraints" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1287" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1294" target="_blank">View source</a>
 </small>
 
 
@@ -1389,7 +1475,7 @@ T = TypeVar('T', bound=str)  # valid bound TypeVar
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20missing-argument" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1316" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1323" target="_blank">View source</a>
 </small>
 
 
@@ -1414,7 +1500,7 @@ func()  # TypeError: func() missing 1 required positional argument: 'x'
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.20">0.0.1-alpha.20</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20missing-typed-dict-key" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1909" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1916" target="_blank">View source</a>
 </small>
 
 
@@ -1447,7 +1533,7 @@ alice["age"]  # KeyError
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20no-matching-overload" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1335" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1342" target="_blank">View source</a>
 </small>
 
 
@@ -1476,7 +1562,7 @@ func("string")  # error: [no-matching-overload]
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20non-subscriptable" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1358" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1365" target="_blank">View source</a>
 </small>
 
 
@@ -1500,7 +1586,7 @@ Subscripting an object that does not support it will raise a `TypeError` at runt
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20not-iterable" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1376" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1383" target="_blank">View source</a>
 </small>
 
 
@@ -1526,7 +1612,7 @@ for i in 34:  # TypeError: 'int' object is not iterable
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20parameter-already-assigned" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1427" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1434" target="_blank">View source</a>
 </small>
 
 
@@ -1553,7 +1639,7 @@ f(1, x=2)  # Error raised here
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.22">0.0.1-alpha.22</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20positional-only-parameter-as-kwarg" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1662" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1669" target="_blank">View source</a>
 </small>
 
 
@@ -1611,7 +1697,7 @@ def test(): -> "int":
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20static-assert-error" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1784" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1791" target="_blank">View source</a>
 </small>
 
 
@@ -1641,7 +1727,7 @@ static_assert(int(2.0 * 3.0) == 6)  # error: does not have a statically known tr
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20subclass-of-final-class" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1518" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1525" target="_blank">View source</a>
 </small>
 
 
@@ -1670,7 +1756,7 @@ class B(A): ...  # Error raised here
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20too-many-positional-arguments" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1563" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1570" target="_blank">View source</a>
 </small>
 
 
@@ -1697,7 +1783,7 @@ f("foo")  # Error raised here
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20type-assertion-failure" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1541" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1548" target="_blank">View source</a>
 </small>
 
 
@@ -1725,7 +1811,7 @@ def _(x: int):
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unavailable-implicit-super-arguments" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1584" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1591" target="_blank">View source</a>
 </small>
 
 
@@ -1771,7 +1857,7 @@ class A:
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unknown-argument" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1641" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1648" target="_blank">View source</a>
 </small>
 
 
@@ -1798,7 +1884,7 @@ f(x=1, y=2)  # Error raised here
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unresolved-attribute" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1683" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1690" target="_blank">View source</a>
 </small>
 
 
@@ -1826,7 +1912,7 @@ A().foo  # AttributeError: 'A' object has no attribute 'foo'
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unresolved-import" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1705" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1712" target="_blank">View source</a>
 </small>
 
 
@@ -1851,7 +1937,7 @@ import foo  # ModuleNotFoundError: No module named 'foo'
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unresolved-reference" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1724" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1731" target="_blank">View source</a>
 </small>
 
 
@@ -1876,7 +1962,7 @@ print(x)  # NameError: name 'x' is not defined
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unsupported-bool-conversion" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1396" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1403" target="_blank">View source</a>
 </small>
 
 
@@ -1913,7 +1999,7 @@ b1 < b2 < b1  # exception raised here
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unsupported-operator" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1743" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1750" target="_blank">View source</a>
 </small>
 
 
@@ -1941,7 +2027,7 @@ A() + A()  # TypeError: unsupported operand type(s) for +: 'A' and 'A'
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'error'."><code>error</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20zero-stepsize-in-slice" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1765" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1772" target="_blank">View source</a>
 </small>
 
 
@@ -1966,7 +2052,7 @@ l[1:10:0]  # ValueError: slice step cannot be zero
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.20">0.0.1-alpha.20</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20ambiguous-protocol-member" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L470" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L477" target="_blank">View source</a>
 </small>
 
 
@@ -2007,7 +2093,7 @@ class SubProto(BaseProto, Protocol):
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.16">0.0.1-alpha.16</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20deprecated" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L285" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L292" target="_blank">View source</a>
 </small>
 
 
@@ -2095,7 +2181,7 @@ a = 20 / 0  # type: ignore
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.22">0.0.1-alpha.22</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20possibly-missing-attribute" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1448" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1455" target="_blank">View source</a>
 </small>
 
 
@@ -2123,7 +2209,7 @@ A.c  # AttributeError: type object 'A' has no attribute 'c'
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.22">0.0.1-alpha.22</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20possibly-missing-implicit-call" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L138" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L145" target="_blank">View source</a>
 </small>
 
 
@@ -2155,7 +2241,7 @@ A()[0]  # TypeError: 'A' object is not subscriptable
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.22">0.0.1-alpha.22</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20possibly-missing-import" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1470" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1477" target="_blank">View source</a>
 </small>
 
 
@@ -2187,7 +2273,7 @@ from module import a  # ImportError: cannot import name 'a' from 'module'
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20redundant-cast" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1836" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1843" target="_blank">View source</a>
 </small>
 
 
@@ -2214,7 +2300,7 @@ cast(int, f())  # Redundant
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20undefined-reveal" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1623" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1630" target="_blank">View source</a>
 </small>
 
 
@@ -2238,7 +2324,7 @@ reveal_type(1)  # NameError: name 'reveal_type' is not defined
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.15">0.0.1-alpha.15</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unresolved-global" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1857" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1864" target="_blank">View source</a>
 </small>
 
 
@@ -2296,7 +2382,7 @@ def g():
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.7">0.0.1-alpha.7</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20unsupported-base" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L719" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L726" target="_blank">View source</a>
 </small>
 
 
@@ -2335,7 +2421,7 @@ class D(C): ...  # error: [unsupported-base]
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'warn'."><code>warn</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.22">0.0.1-alpha.22</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20useless-overload-body" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1025" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1032" target="_blank">View source</a>
 </small>
 
 
@@ -2398,7 +2484,7 @@ def foo(x: int | str) -> int | str:
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'ignore'."><code>ignore</code></a> ·
 Preview (since <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a>) ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20division-by-zero" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L267" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L274" target="_blank">View source</a>
 </small>
 
 
@@ -2422,7 +2508,7 @@ Dividing by zero raises a `ZeroDivisionError` at runtime.
 Default level: <a href="../rules.md#rule-levels" title="This lint has a default level of 'ignore'."><code>ignore</code></a> ·
 Added in <a href="https://github.com/astral-sh/ty/releases/tag/0.0.1-alpha.1">0.0.1-alpha.1</a> ·
 <a href="https://github.com/astral-sh/ty/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20possibly-unresolved-reference" target="_blank">Related issues</a> ·
-<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1496" target="_blank">View source</a>
+<a href="https://github.com/astral-sh/ruff/blob/main/crates%2Fty_python_semantic%2Fsrc%2Ftypes%2Fdiagnostic.rs#L1503" target="_blank">View source</a>
 </small>
 
 

crates/ty/src/lib.rs

@@ -5,6 +5,7 @@ mod python_version;
 mod version;
 
 pub use args::Cli;
+use ty_project::metadata::settings::TerminalSettings;
 use ty_static::EnvVars;
 
 use std::fmt::Write;
@@ -21,7 +22,9 @@ use clap::{CommandFactory, Parser};
 use colored::Colorize;
 use crossbeam::channel as crossbeam_channel;
 use rayon::ThreadPoolBuilder;
-use ruff_db::diagnostic::{Diagnostic, DisplayDiagnosticConfig, DisplayDiagnostics, Severity};
+use ruff_db::diagnostic::{
+    Diagnostic, DiagnosticId, DisplayDiagnosticConfig, DisplayDiagnostics, Severity,
+};
 use ruff_db::files::File;
 use ruff_db::max_parallelism;
 use ruff_db::system::{OsSystem, SystemPath, SystemPathBuf};
@@ -193,6 +196,12 @@ pub enum ExitStatus {
     InternalError = 101,
 }
 
+impl ExitStatus {
+    pub const fn is_internal_error(self) -> bool {
+        matches!(self, ExitStatus::InternalError)
+    }
+}
+
 impl Termination for ExitStatus {
     fn report(self) -> ExitCode {
         ExitCode::from(self as u8)
@@ -334,11 +343,8 @@ impl MainLoop {
                             let diagnostics_count = result.len();
 
                             let mut stdout = self.printer.stream_for_details().lock();
-                            let max_severity = result
-                                .iter()
-                                .map(Diagnostic::severity)
-                                .max()
-                                .unwrap_or(Severity::Info);
+                            let exit_status =
+                                exit_status_from_diagnostics(&result, terminal_settings);
 
                             // Only render diagnostics if they're going to be displayed, since doing
                             // so is expensive.
@@ -359,25 +365,14 @@ impl MainLoop {
                                 )?;
                             }
 
-                            if max_severity.is_fatal() {
+                            if exit_status.is_internal_error() {
                                 tracing::warn!(
                                     "A fatal error occurred while checking some files. Not all project files were analyzed. See the diagnostics list above for details."
                                 );
                             }
 
                             if self.watcher.is_none() {
-                                return Ok(match max_severity {
-                                    Severity::Info => ExitStatus::Success,
-                                    Severity::Warning => {
-                                        if terminal_settings.error_on_warning {
-                                            ExitStatus::Failure
-                                        } else {
-                                            ExitStatus::Success
-                                        }
-                                    }
-                                    Severity::Error => ExitStatus::Failure,
-                                    Severity::Fatal => ExitStatus::InternalError,
-                                });
+                                return Ok(exit_status);
                             }
                         }
                     } else {
@@ -410,6 +405,40 @@ impl MainLoop {
     }
 }
 
+fn exit_status_from_diagnostics(
+    diagnostics: &[Diagnostic],
+    terminal_settings: &TerminalSettings,
+) -> ExitStatus {
+    if diagnostics.is_empty() {
+        return ExitStatus::Success;
+    }
+
+    let mut max_severity = Severity::Info;
+    let mut io_error = false;
+
+    for diagnostic in diagnostics {
+        max_severity = max_severity.max(diagnostic.severity());
+        io_error = io_error || matches!(diagnostic.id(), DiagnosticId::Io);
+    }
+
+    if !max_severity.is_fatal() && io_error {
+        return ExitStatus::Error;
+    }
+
+    match max_severity {
+        Severity::Info => ExitStatus::Success,
+        Severity::Warning => {
+            if terminal_settings.error_on_warning {
+                ExitStatus::Failure
+            } else {
+                ExitStatus::Success
+            }
+        }
+        Severity::Error => ExitStatus::Failure,
+        Severity::Fatal => ExitStatus::InternalError,
+    }
+}
+
 /// A progress reporter for `ty check`.
 struct IndicatifReporter {
     collector: CollectReporter,

crates/ty/tests/cli/main.rs

@@ -41,22 +41,24 @@ fn test_quiet_output() -> anyhow::Result<()> {
     let case = CliTest::with_file("test.py", "x: int = 'foo'")?;
 
     // By default, we emit a diagnostic
-    assert_cmd_snapshot!(case.command(), @r###"
+    assert_cmd_snapshot!(case.command(), @r#"
     success: false
     exit_code: 1
     ----- stdout -----
     error[invalid-assignment]: Object of type `Literal["foo"]` is not assignable to `int`
-     --> test.py:1:1
+     --> test.py:1:4
       |
     1 | x: int = 'foo'
-      | ^
+      |    ---   ^^^^^ Incompatible value of type `Literal["foo"]`
+      |    |
+      |    Declared type
       |
     info: rule `invalid-assignment` is enabled by default
 
     Found 1 diagnostic
 
     ----- stderr -----
-    "###);
+    "#);
 
     // With `quiet`, the diagnostic is not displayed, just the summary message
     assert_cmd_snapshot!(case.command().arg("--quiet"), @r"
@@ -560,9 +562,9 @@ fn check_non_existing_path() -> anyhow::Result<()> {
 
     assert_cmd_snapshot!(
         case.command().arg("project/main.py").arg("project/tests"),
-        @r###"
+        @r"
     success: false
-    exit_code: 1
+    exit_code: 2
     ----- stdout -----
     error[io]: `<temp_dir>/project/main.py`: No such file or directory (os error 2)
 
@@ -572,7 +574,7 @@ fn check_non_existing_path() -> anyhow::Result<()> {
 
     ----- stderr -----
     WARN No python files found under the given path(s)
-    "###
+    "
     );
 
     Ok(())

crates/ty/tests/cli/python_environment.rs

@@ -37,7 +37,8 @@ fn config_override_python_version() -> anyhow::Result<()> {
     5 | print(sys.last_exc)
       |       ^^^^^^^^^^^^
       |
-    info: Python 3.11 was assumed when accessing `last_exc`
+    info: The member may be available on other Python versions or platforms
+    info: Python 3.11 was assumed when resolving the `last_exc` attribute
      --> pyproject.toml:3:18
       |
     2 | [tool.ty.environment]
@@ -1179,6 +1180,8 @@ fn defaults_to_a_new_python_version() -> anyhow::Result<()> {
             import os
 
             os.grantpt(1) # only available on unix, Python 3.13 or newer
+
+            from typing import LiteralString  # added in Python 3.11
             "#,
         ),
     ])?;
@@ -1194,8 +1197,11 @@ fn defaults_to_a_new_python_version() -> anyhow::Result<()> {
     3 |
     4 | os.grantpt(1) # only available on unix, Python 3.13 or newer
       | ^^^^^^^^^^
+    5 |
+    6 | from typing import LiteralString  # added in Python 3.11
       |
-    info: Python 3.10 was assumed when accessing `grantpt`
+    info: The member may be available on other Python versions or platforms
+    info: Python 3.10 was assumed when resolving the `grantpt` attribute
      --> ty.toml:3:18
       |
     2 | [environment]
@@ -1205,7 +1211,26 @@ fn defaults_to_a_new_python_version() -> anyhow::Result<()> {
       |
     info: rule `unresolved-attribute` is enabled by default
 
-    Found 1 diagnostic
+    error[unresolved-import]: Module `typing` has no member `LiteralString`
+     --> main.py:6:20
+      |
+    4 | os.grantpt(1) # only available on unix, Python 3.13 or newer
+    5 |
+    6 | from typing import LiteralString  # added in Python 3.11
+      |                    ^^^^^^^^^^^^^
+      |
+    info: The member may be available on other Python versions or platforms
+    info: Python 3.10 was assumed when resolving imports
+     --> ty.toml:3:18
+      |
+    2 | [environment]
+    3 | python-version = "3.10"
+      |                  ^^^^^^ Python 3.10 assumed due to this configuration setting
+    4 | python-platform = "linux"
+      |
+    info: rule `unresolved-import` is enabled by default
+
+    Found 2 diagnostics
 
     ----- stderr -----
     "#);
@@ -1225,6 +1250,8 @@ fn defaults_to_a_new_python_version() -> anyhow::Result<()> {
             import os
 
             os.grantpt(1) # only available on unix, Python 3.13 or newer
+
+            from typing import LiteralString  # added in Python 3.11
             "#,
         ),
     ])?;

crates/ty_completion_eval/completion-evaluation-tasks.csv

@@ -18,11 +18,11 @@ numpy-array,main.py,1,1
 object-attr-instance-methods,main.py,0,1
 object-attr-instance-methods,main.py,1,1
 pass-keyword-completion,main.py,0,1
-raise-uses-base-exception,main.py,0,2
+raise-uses-base-exception,main.py,0,1
 scope-existing-over-new-import,main.py,0,1
 scope-prioritize-closer,main.py,0,2
 scope-simple-long-identifier,main.py,0,1
 tstring-completions,main.py,0,1
 ty-extensions-lower-stdlib,main.py,0,8
 type-var-typing-over-ast,main.py,0,3
-type-var-typing-over-ast,main.py,1,279
+type-var-typing-over-ast,main.py,1,278

crates/ty_ide/src/all_symbols.rs

@@ -8,13 +8,12 @@ use crate::symbols::{QueryPattern, SymbolInfo, symbols_for_file_global_only};
 ///
 /// Returns symbols from all files in the workspace and dependencies, filtered
 /// by the query.
-pub fn all_symbols<'db>(db: &'db dyn Db, query: &str) -> Vec<AllSymbolInfo<'db>> {
+pub fn all_symbols<'db>(db: &'db dyn Db, query: &QueryPattern) -> Vec<AllSymbolInfo<'db>> {
     // If the query is empty, return immediately to avoid expensive file scanning
-    if query.is_empty() {
+    if query.will_match_everything() {
         return Vec::new();
     }
 
-    let query = QueryPattern::new(query);
     let results = std::sync::Mutex::new(Vec::new());
     {
         let modules = all_modules(db);
@@ -144,7 +143,7 @@ ABCDEFGHIJKLMNOP = 'https://api.example.com'
 
     impl CursorTest {
         fn all_symbols(&self, query: &str) -> String {
-            let symbols = all_symbols(&self.db, query);
+            let symbols = all_symbols(&self.db, &QueryPattern::new(query));
 
             if symbols.is_empty() {
                 return "No symbols found".to_string();