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gh-159739: Do not intern complex subclasses in code constants - #159980
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JelleZijlstra merged 2 commits intoOct 22, 2026
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JelleZijlstra merged 2 commits into
JelleZijlstra merged 2 commits into
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Backport to 3.15 and 3.14.
aisk
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Oct 21, 2026
aisk
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Oct 22, 2026
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Thanks @jelle-openai for the PR, and @JelleZijlstra for merging it 🌮🎉.. I'm working now to backport this PR to: 3.14, 3.15. |
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GH-160249 is a backport of this pull request to the 3.15 branch. |
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GH-160250 is a backport of this pull request to the 3.14 branch. |
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Do not intern complex subclasses in code constants. On free-threaded builds, the code-constant interning check accepts
complexsubclasses instead of only exactcomplexobjects. An instance supplied throughcode.replace(co_consts=...)can therefore run a user-defined__hash__during code-object creation and become immortal, unexpectedly retaining the instance and anything it references.Backport to 3.15 and 3.14.