[3.9] bpo-44184: Fix subtype_dealloc() for freed type (GH-26274) #27176
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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 <[email protected]>
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@vstinner: Status check is done, and it's a success ✅ . |
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@vstinner: Status check is done, and it's a success ✅ . |
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@vstinner: Status check is done, and it's a success ✅ . |
Yhg1s
approved these changes
Jul 15, 2021
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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 [email protected]
https://bugs.python.org/issue44184