[issue38006] Crash in remove() weak reference callback of weakref.WeakValueDictionary at Python exit

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

PyFunction_Type.tp_clear changed in bpo-33418 (previously, it was equal to 0: no clear method):

commit 3c452404ae178b742967589a0bb4a5ec768d76e0
Author: INADA Naoki <methane at users.noreply.github.com>
Date:   Wed Jul 4 11:15:50 2018 +0900

    bpo-33418: Add tp_clear for function object (GH-8058)
    
    Without tp_clear, GC can't break cyclic reference.
    It will cause memory leak when cyclic reference is
    created intentionally.

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<https://bugs.python.org/issue38006>
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