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Title: [3.10] bpo-44184: Fix subtype_dealloc() for freed type (GH-26274) by miss-islington · Pull Request #26290 · python/cpython · GitHub

Open Graph Title: [3.10] bpo-44184: Fix subtype_dealloc() for freed type (GH-26274) by miss-islington · Pull Request #26290 · python/cpython

X Title: [3.10] bpo-44184: Fix subtype_dealloc() for freed type (GH-26274) by miss-islington · Pull Request #26290 · python/cpython

Description: 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. (cherry picked from commit 615069e) Co-authored-by: Victor Stinner vstinner@python.org https://bugs.python.org/issue44184

Open Graph Description: 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 th...

X Description: 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 deallocat...

Opengraph URL: https://github.com/python/cpython/pull/26290

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4a549e4 bpo-44184: Fix subtype_dealloc() for freed type (GH-26274) vstinner May 21, 2021 https://github.com/python/cpython/pull/26290/commits/4a549e4f5727e2876990403f18920a2675d8e527
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