Fix selfcheck

python · ilevkivskyi · Jul 7, 2025 · Jun 18, 2025 · Jun 18, 2025 · Jun 18, 2025
commit 29a47f1550d3c167e2c0dcba5fa80466aff086f1
diff --git a/mypy/semanal.py b/mypy/semanal.py
@@ -1567,7 +1567,9 @@ def analyze_property_with_multi_part_definition(
                         )
         return bare_setter_type
 
-    def _is_valid_property_decorator(self, deco: Expression, property_name: str) -> bool:
+    def _is_valid_property_decorator(
+        self, deco: Expression, property_name: str
+    ) -> TypeGuard[MemberExpr]:
         if not isinstance(deco, MemberExpr):
             return False
         if not isinstance(deco.expr, NameExpr) or deco.expr.name != property_name: