[3.14] gh-141174: Test get_annotations() on wrapped cyclical functools.partial (GH-155663) (#155710)

miss-islington · dr-carlos · web-flow · commit 547722204ede · 2026-08-13T14:45:29.000Z
gh-141174: Test `get_annotations()` on wrapped cyclical `functools.partial` (GH-155663) Test `get_annotations()` on wrapped cyclical `functools.partial` (cherry picked from commit 5d3f02a) Co-authored-by: dr-carlos <77367421+dr-carlos@users.noreply.github.com>
diff --git a/Lib/test/test_annotationlib.py b/Lib/test/test_annotationlib.py
@@ -654,6 +654,13 @@ def f(x: 'int') -> 'str': ...
         result = get_annotations(f, eval_str=True)
         self.assertEqual(result, {'x': int, 'return': str})
 
+    def test_eval_str_wrapped_partial_cycle_self(self):
+        def f(x: 'int') -> 'str': ...
+        f.__wrapped__ = functools.partial(f, 0)
+        # Cycle is detected and broken; globals from f itself are used.
+        result = get_annotations(f, eval_str=True)
+        self.assertEqual(result, {'x': int, 'return': str})
+
     def test_eval_str_wrapped_cycle_mutual(self):
         # gh-146556: mutual __wrapped__ cycle (a -> b -> a) must not hang.
         def a(x: 'int'): ...
