comment

Author: kumaraditya303

Lib/test/test_asyncio/test_futures.py

@@ -698,6 +698,10 @@ def test_future_del_segfault(self):
             del fut._log_traceback
 
     def test_callbacks_copy(self):
+        # See https://github.com/python/cpython/issues/125789
+        # In C implementation, the `_callbacks` attribute
+        # always returns a new list to avoid mutations of internal state
+
         fut = self._new_future(loop=self.loop)
         f1 = lambda _: 1
         f2 = lambda _: 2