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GeezerVison is showing github.com — gh-159739: Release weak proxy operands on errors by jelle-openai · Pull Request #159968 · python/cpython

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@jelle-openai

@jelle-openai jelle-openai commented Oct 20, 2026 •
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Release weak proxy operands on errors. Binary, ternary, and comparison operations unwrap their operands in sequence. If a later operand is a dead weak proxy, they raise ReferenceError without dropping the strong references acquired for earlier operands, so those objects can stay alive after their last intended reference is gone.

Backport to 3.15 and 3.14.

  • Issue: Fix minor safety issues #159739

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@jelle-openai
pythongh-159739: Release weak proxy operands on errors
056b1f8 
Backport to 3.15 and 3.14.
@bedevere-app bedevere-app Bot mentioned this pull request Oct 20, 2026
Fix minor safety issues #159739
Open
@JelleZijlstra
JelleZijlstra marked this pull request as ready for review October 21, 2026 04:10
@JelleZijlstra
JelleZijlstra requested a review from kumaraditya303 as a code owner October 21, 2026 04:10
@bedevere-app bedevere-app Bot added the awaiting review label Oct 21, 2026
@JelleZijlstra JelleZijlstra added needs backport to 3.14 bugs and security fixes needs backport to 3.15 bugs and security fixes labels Oct 21, 2026
@JelleZijlstra
JelleZijlstra merged commit ebce4b7 into python:main Oct 21, 2026
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@bedevere-app bedevere-app Bot removed the awaiting review label Oct 21, 2026
@miss-islington-app

miss-islington-app Bot commented Oct 21, 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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@bedevere-app

bedevere-app Bot commented Oct 21, 2026

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GH-160018 is a backport of this pull request to the 3.15 branch.
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@bedevere-app bedevere-app Bot removed the needs backport to 3.15 bugs and security fixes label Oct 21, 2026
@bedevere-app

bedevere-app Bot commented Oct 21, 2026

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GH-160019 is a backport of this pull request to the 3.14 branch.
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@bedevere-app bedevere-app Bot removed the needs backport to 3.14 bugs and security fixes label Oct 21, 2026
JelleZijlstra pushed a commit that referenced this pull request Oct 21, 2026
@miss-islington @jelle-openai
[3.14] gh-159739: Release weak proxy operands on errors (GH-159968) (#…
f3453a0 
…160019)

(cherry picked from commit ebce4b7)

Co-authored-by: Jelle Zijlstra <[email protected]>
JelleZijlstra pushed a commit that referenced this pull request Oct 21, 2026
@miss-islington @jelle-openai
[3.15] gh-159739: Release weak proxy operands on errors (GH-159968) (#…
2d4adac 
…160018)

(cherry picked from commit ebce4b7)

Co-authored-by: Jelle Zijlstra <[email protected]>
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@kumaraditya303 kumaraditya303 Awaiting requested review from kumaraditya303 kumaraditya303 is a code owner

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@jelle-openai @JelleZijlstra
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