116fd7c7af
## Summary If you manage to create an `typing.GenericAlias` instance without us knowing how that was created, then we don't know what to do with this in a type annotation. So it's better to be explicit and show an error instead of failing silently with a `@Todo` type. ## Test Plan * New Markdown tests * Zero ecosystem impact
Markdown files within the mdtest/ subdirectory are tests of type inference and type checking;
executed by the tests/mdtest.rs integration test.
See crates/ty_test/README.md for documentation of this test format.