STINNER Victor <vstin...@python.org> added the comment:
The issue is fixed by:
commit 615069eb08494d089bf24e43547fbc482ed699b8
Author: Victor Stinner <vstin...@python.org>
Date: Fri May 21 19:19:54 2021 +0200
bpo-44184: Fix subtype_dealloc() for freed type (GH-26274)
Fix a crash at Python exit when a deallocator function removes the
last strong reference to a heap type.
Don't read type memory after calling basedealloc() since
basedealloc() can deallocate the type and free its memory.
_PyMem_IsPtrFreed() argument is now constant.
----------
resolution: -> fixed
stage: patch review -> resolved
status: open -> closed
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue44184>
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