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author	Victor Stinner <vstinner@python.org>
	Fri, 21 May 2021 17:19:54 +0000 (19:19 +0200)
committer	GitHub <noreply@github.com>
	Fri, 21 May 2021 17:19:54 +0000 (19:19 +0200)
commit	615069eb08494d089bf24e43547fbc482ed699b8
tree	06d4a3c69bb0f8078f4021aee8c19d2924a2f774	tree \| snapshot
parent	642fdfdc04e8e40c2cd3e65d67b09fac472bb345	commit \| diff

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.

Include/internal/pycore_pymem.h		diff \| blob \| blame \| history
Lib/test/test_gc.py		diff \| blob \| blame \| history
Misc/NEWS.d/next/Core and Builtins/2021-05-21-01-42-45.bpo-44184.9qOptC.rst	[new file with mode: 0644]	blob
Objects/typeobject.c		diff \| blob \| blame \| history

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