[issue38085] Interrupting class creation in __init_subclass__ may lead to incorrect isinstance() and issubclass() results

[hongweipeng]

Change by hongweipeng <hongweichen8888 at sina.com>:


----------
keywords: +patch
pull_requests: +28335
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/30112

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38085>
_______________________________________