Add test suggested by Alex

JelleZijlstra · Nov 29, 2023 · e323502 · e323502
1 parent d528dc8
commit e323502
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/Lib/test/test_warnings/__init__.py b/Lib/test/test_warnings/__init__.py
@@ -1649,6 +1649,13 @@ class Foo: ...
             @deprecated
             def foo(): ...
 
+    def test_no_retained_references_to_wrapper_instance(self):
+        @deprecated('depr')
+        def d(): pass
+
+        self.assertFalse(any(
+            isinstance(cell.cell_contents, deprecated) for cell in d.__closure__
+        ))
 
 def setUpModule():
     py_warnings.onceregistry.clear()