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[3.14] GH-91636: Clear weakrefs created by finalizers. (GH-136401)#144444

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hugovk merged 2 commits into
python:3.14python/cpython:3.14from
sergey-miryanov:backport-b6b99bf-3.14sergey-miryanov/cpython:backport-b6b99bf-3.14Copy head branch name to clipboard
Mar 12, 2026
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[3.14] GH-91636: Clear weakrefs created by finalizers. (GH-136401)#144444
hugovk merged 2 commits into
python:3.14python/cpython:3.14from
sergey-miryanov:backport-b6b99bf-3.14sergey-miryanov/cpython:backport-b6b99bf-3.14Copy head branch name to clipboard

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@sergey-miryanov

@sergey-miryanov sergey-miryanov commented Feb 3, 2026 •
edited by bedevere-app Bot
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Weakrefs to unreachable garbage that are created during running of finalizers need to be cleared. This avoids exposing objects that have tp_clear called on them to Python-level code. (cherry picked from commit b6b99bf)

@nascheme @sergey-miryanov
[3.14] pythonGH-91636: Clear weakrefs created by finalizers. (pythonG…
35ccf67 
…H-136401)

Weakrefs to unreachable garbage that are created during running of
finalizers need to be cleared.  This avoids exposing objects that
have `tp_clear` called on them to Python-level code.
(cherry picked from commit b6b99bf)

Co-authored-by: Neil Schemenauer <nas-github@arctrix.com>
This was referenced Feb 3, 2026
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@gpshead

gpshead commented Mar 5, 2026

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assigning to @hugovk as RM to decide if this gets backported. #144214 is the PR for 3.13 that should also be merged if so.

@hugovk hugovk merged commit 705e3ea into python:3.14 Mar 12, 2026
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@vstinner vstinner mentioned this pull request Mar 12, 2026
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