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gh-152375: Fix UB in `INSTRUMENTED_JUMP` by StanFromIreland · Pull Request #152376 · python/cpython · GitHub

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gh-152375: Fix UB in INSTRUMENTED_JUMP - #152376

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StanFromIreland merged 2 commits into
python:mainfrom
StanFromIreland:INSTRUMENTED_JUMP-ub
Jun 29, 2026
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gh-152375: Fix UB in INSTRUMENTED_JUMP#152376
StanFromIreland merged 2 commits into
python:mainfrom
StanFromIreland:INSTRUMENTED_JUMP-ub

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StanFromIreland commented Jun 27, 2026 •
edited by bedevere-app Bot
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I didn't add a test, I think it's too messy here, but I don't feel strongly about it. It is also already covered (non-deterministically) by test_monitoring, as that's what triggered UBSan.

bedevere-app Bot mentioned this pull request Jun 27, 2026
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iritkatriel reviewed Jun 27, 2026
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Comment thread Python/ceval_macros.h
StanFromIreland added needs backport to 3.13 bugs and security fixes needs backport to 3.14 bugs and security fixes needs backport to 3.15 pre-release feature fixes, bugs and security fixes labels Jun 27, 2026
StanFromIreland merged commit cdec9ac into python:main Jun 29, 2026
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StanFromIreland deleted the INSTRUMENTED_JUMP-ub branch June 29, 2026 09:06

miss-islington-app Bot commented Jun 29, 2026

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Thanks @StanFromIreland for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14, 3.15.
🐍🍒⛏🤖

bedevere-app Bot commented Jun 29, 2026

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GH-152566 is a backport of this pull request to the 3.15 branch.

miss-islington-app Bot commented Jun 29, 2026

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Sorry, @StanFromIreland, I could not cleanly backport this to 3.13 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker cdec9acd63c33d9b822700de8f63eb94d86e1c93 3.13

bedevere-app Bot removed the needs backport to 3.15 pre-release feature fixes, bugs and security fixes label Jun 29, 2026

bedevere-app Bot commented Jun 29, 2026

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GH-152567 is a backport of this pull request to the 3.14 branch.

bedevere-app Bot removed the needs backport to 3.14 bugs and security fixes label Jun 29, 2026

StanFromIreland commented Jun 29, 2026

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Thanks for the review!

StanFromIreland added a commit that referenced this pull request Jun 29, 2026
[3.14] gh-152375: Fix undefined behaviour in the INSTRUMENTED_JUMP …
be68d9a 
…macro (GH-152376) (#152567)

(cherry picked from commit cdec9ac)

Co-authored-by: Stan Ulbrych <stan@python.org>

bedevere-app Bot commented Jun 29, 2026

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GH-152577 is a backport of this pull request to the 3.13 branch.

bedevere-app Bot removed the needs backport to 3.13 bugs and security fixes label Jun 29, 2026
StanFromIreland added a commit that referenced this pull request Jun 29, 2026
[3.15] gh-152375: Fix undefined behaviour in the INSTRUMENTED_JUMP …
00a4304 
…macro (GH-152376) (#152566)

(cherry picked from commit cdec9ac)

Co-authored-by: Stan Ulbrych <stan@python.org>
StanFromIreland added a commit that referenced this pull request Jun 29, 2026
[3.13] gh-152375: Fix undefined behaviour in the INSTRUMENTED_JUMP …
1638151 
…macro (GH-152376) (#152577)

(cherry picked from commit cdec9ac)
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iritkatriel iritkatriel approved these changes
markshannon Awaiting requested review from markshannon markshannon is a code owner

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