Fix crash on deferred value constrained TypeVar (python#14642)

Fixes python#14631
ilinum · Feb 8, 2023 · a7b124a · a7b124a
1 parent bc18017
commit a7b124a
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Showing 2 changed files with 15 additions and 2 deletions.
diff --git a/mypy/types.py b/mypy/types.py
@@ -587,12 +587,16 @@ def accept(self, visitor: TypeVisitor[T]) -> T:
         return visitor.visit_type_var(self)
 
     def __hash__(self) -> int:
-        return hash((self.id, self.upper_bound))
+        return hash((self.id, self.upper_bound, tuple(self.values)))
 
     def __eq__(self, other: object) -> bool:
         if not isinstance(other, TypeVarType):
             return NotImplemented
-        return self.id == other.id and self.upper_bound == other.upper_bound
+        return (
+            self.id == other.id
+            and self.upper_bound == other.upper_bound
+            and self.values == other.values
+        )
 
     def serialize(self) -> JsonDict:
         assert not self.id.is_meta_var()

diff --git a/test-data/unit/check-typevar-values.test b/test-data/unit/check-typevar-values.test
@@ -702,3 +702,12 @@ class Indexable:
 
 [builtins fixtures/tuple.pyi]
 [builtins fixtures/classmethod.pyi]
+
+[case testTypeVarWithValueDeferral]
+from typing import TypeVar, Callable
+
+T = TypeVar("T", "A", "B")
+Func = Callable[[], T]
+
+class A: ...
+class B: ...