Fix selfcheck

Author: sterliakov

mypy/checker.py

@@ -2337,7 +2337,11 @@ def check_method_override_for_base_with_name(
         return False
 
     def get_property_instance(self, method: Decorator | OverloadedFuncDef) -> Instance | None:
+        if method.type is None:
+            return None
         deco = method if isinstance(method, Decorator) else method.items[0]
+        if not isinstance(deco, Decorator):
+            return None
         property_deco_name = next(
             (
                 name

mypy/checker_shared.py

@@ -21,6 +21,7 @@
     LambdaExpr,
     MypyFile,
     Node,
+    OverloadedFuncDef,
     RefExpr,
     SymbolNode,
     TypeInfo,
@@ -279,7 +280,7 @@ def get_precise_awaitable_type(self, typ: Type, local_errors: ErrorWatcher) -> T
         raise NotImplementedError
 
     @abstractmethod
-    def get_property_instance(self, method: Decorator) -> Instance | None:
+    def get_property_instance(self, method: Decorator | OverloadedFuncDef) -> Instance | None:
         raise NotImplementedError
 
     @abstractmethod