gh-155978: Fix leak in update_slot_after_setattr() - #155979
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kumaraditya303 merged 1 commit intoAug 18, 2026
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On free-threaded builds, update_slot_after_setattr() stack-allocates a single chunk to queue slot updates, assuming one setattr never needs more. However, update_subclasses() queues one update per affected subclass and so can require heap-allocated chunks. Free those chunks after the slots update.
nascheme
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August 18, 2026 00:52
kumaraditya303
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Aug 18, 2026
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Thanks @nascheme for the PR, and @kumaraditya303 for merging it 🌮🎉.. I'm working now to backport this PR to: 3.15. |
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Sorry, @nascheme and @kumaraditya303, I could not cleanly backport this to |
nascheme
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…onGH-155979) (cherry picked from commit f381d16) Co-authored-by: Neil Schemenauer <nas-github@arctrix.com>
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GH-155984 is a backport of this pull request to the 3.15 branch. |
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On free-threaded builds, update_slot_after_setattr() stack-allocates a single chunk to queue slot updates, assuming one setattr never needs more. However, update_subclasses() queues one update per affected subclass and so can require heap-allocated chunks. Free those chunks after the slots update.