GeezerVison is showing github.com — [3.15] gh-159739: Avoid destroying a remote unwinder cache twice (GH-159982) by miss-islington · Pull Request #160023 · python/cpython
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Oct 21, 2026
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In a free-threaded build, if allocating the thread-local bytecode cache fails after the code-object cache has been created, the initializer destroys the first cache and returns an error without clearing its pointer. Failed construction then invokes the unwinder's deallocator, which destroys the same cache again and can crash the profiling process instead of propagating MemoryError.
(cherry picked from commit b577a54)
Co-authored-by: Jelle Zijlstra [email protected]
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…onGH-159982)
In a free-threaded build, if allocating the thread-local bytecode cache fails after the code-object cache has been created, the initializer destroys the first cache and returns an error without clearing its pointer. Failed construction then invokes the unwinder's deallocator, which destroys the same cache again and can crash the profiling process instead of propagating `MemoryError`.
(cherry picked from commit b577a54)
Co-authored-by: Jelle Zijlstra <[email protected]>
This was referenced Oct 21, 2026
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