From e7a270a1db4752c5e9ae8d4106eae32d8f9b2138 Mon Sep 17 00:00:00 2001
From: dr-carlos <77367421+dr-carlos@users.noreply.github.com>
Date: Thu, 13 Aug 2026 23:47:21 +0930
Subject: [PATCH] gh-141174: Test `get_annotations()` on wrapped cyclical
 `functools.partial` (GH-155663)

Test `get_annotations()` on wrapped cyclical `functools.partial`
(cherry picked from commit 5d3f02a5c339f03fc377bacd40a83eb9217ffddb)

Co-authored-by: dr-carlos <77367421+dr-carlos@users.noreply.github.com>
---
 Lib/test/test_annotationlib.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Lib/test/test_annotationlib.py b/Lib/test/test_annotationlib.py
index 5087c3ca425f1fc..b86b94d5b5c87dd 100644
--- 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'): ...