[ty] Narrow type context during literal promotion in generic class constructors (#21574)

## Summary Resolves https://github.com/astral-sh/ty/issues/1603.
2025-11-21 17:05:32 -05:00
parent 09d457aa52
commit 040aa7463b
2 changed files with 8 additions and 4 deletions
--- a/crates/ty_python_semantic/src/types.rs
+++ b/crates/ty_python_semantic/src/types.rs
@@ -3504,9 +3504,10 @@ impl<'db> Type<'db> {
            return;
        };

-        let tcx_specialization = tcx
-            .annotation
-            .and_then(|tcx| tcx.specialization_of(db, class_literal));
+        let tcx_specialization = tcx.annotation.and_then(|tcx| {
+            tcx.filter_union(db, |ty| ty.specialization_of(db, class_literal).is_some())
+                .specialization_of(db, class_literal)
+        });

        for (typevar, ty) in specialization
            .generic_context(db)