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Title: gh-109786: Fix leaks when re-enter itertools.pairwise.__next__() by serhiy-storchaka · Pull Request #109788 · python/cpython · GitHub

Open Graph Title: gh-109786: Fix leaks when re-enter itertools.pairwise.__next__() by serhiy-storchaka · Pull Request #109788 · python/cpython

X Title: gh-109786: Fix leaks when re-enter itertools.pairwise.__next__() by serhiy-storchaka · Pull Request #109788 · python/cpython

Description: The Python programming language. Contribute to python/cpython development by creating an account on GitHub.

Open Graph Description: Issue: Re-entering pairwise.__next__() leaks references #109786

X Description: Issue: Re-entering pairwise.__next__() leaks references #109786

Opengraph URL: https://github.com/python/cpython/pull/109788

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python:mainhttps://github.com/python/cpython/tree/main
serhiy-storchaka:itertools-pairwise-reenterhttps://github.com/serhiy-storchaka/cpython/tree/itertools-pairwise-reenter
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gh-109786: Fix leaks when re-enter itertools.pairwise.__next__()https://github.com/python/cpython/pull/109788#top
serhiy-storchakahttps://github.com/serhiy-storchaka
python:mainhttps://github.com/python/cpython/tree/main
serhiy-storchaka:itertools-pairwise-reenterhttps://github.com/serhiy-storchaka/cpython/tree/itertools-pairwise-reenter
https://github.com/serhiy-storchaka
serhiy-storchakahttps://github.com/serhiy-storchaka
Sep 23, 2023https://github.com/python/cpython/pull/109788#issue-1909839799
Please reload this pagehttps://github.com/python/cpython/pull/109788
Re-entering pairwise.__next__() leaks references #109786https://github.com/python/cpython/issues/109786
Please reload this pagehttps://github.com/python/cpython/pull/109788
https://github.com/serhiy-storchaka
pythongh-109786https://github.com/python/cpython/issues/109786
: Fix leaks when re-enter itertools.pairwise.__next__()https://github.com/python/cpython/pull/109788/commits/c0f43606f8c82cc9511c51fa2a9d12d058fbb438
c0f4360https://github.com/python/cpython/pull/109788/commits/c0f43606f8c82cc9511c51fa2a9d12d058fbb438
https://github.com/serhiy-storchaka
serhiy-storchakahttps://github.com/serhiy-storchaka
needs backport to 3.11 https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22needs%20backport%20to%203.11%22
needs backport to 3.12 https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22needs%20backport%20to%203.12%22
Sep 23, 2023https://github.com/python/cpython/pull/109788#event-10453096202
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serhiy-storchakahttps://github.com/serhiy-storchaka
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code ownerhttps://github.com/python/cpython/blob/e8be0c9c5a7c2327b3dd64009f45ee0682322dcb/.github/CODEOWNERS#L141
September 23, 2023 11:43https://github.com/python/cpython/pull/109788#event-10453096211
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
awaiting review https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22awaiting%20review%22
Sep 23, 2023https://github.com/python/cpython/pull/109788#event-10453096256
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
Sep 23, 2023 https://github.com/python/cpython/pull/109788#ref-issue-1909838596
Re-entering pairwise.__next__() leaks references #109786 https://github.com/python/cpython/issues/109786
https://github.com/serhiy-storchaka
serhiy-storchakahttps://github.com/serhiy-storchaka
Sep 23, 2023 https://github.com/python/cpython/pull/109788#pullrequestreview-1640872720
View reviewed changes https://github.com/python/cpython/pull/109788/files/c0f43606f8c82cc9511c51fa2a9d12d058fbb438
Lib/test/test_itertools.pyhttps://github.com/python/cpython/pull/109788/files/c0f43606f8c82cc9511c51fa2a9d12d058fbb438#diff-9abbaeca99112e9e04b554726bff97b76030eb982f39e591be77be8ef14149e5
Please reload this pagehttps://github.com/python/cpython/pull/109788
Modules/itertoolsmodule.chttps://github.com/python/cpython/pull/109788/files/c0f43606f8c82cc9511c51fa2a9d12d058fbb438#diff-dc27cbdf2b9f6e5236cade13cf301d352a7abd2a8b1988f2517d6f5b7a30c201
serhiy-storchakahttps://github.com/serhiy-storchaka
Sep 23, 2023https://github.com/python/cpython/pull/109788#discussion_r1334975947
Learn morehttps://docs.github.com/articles/managing-disruptive-comments/#hiding-a-comment
Please reload this pagehttps://github.com/python/cpython/pull/109788
serhiy-storchakahttps://github.com/serhiy-storchaka
September 23, 2023 15:05https://github.com/python/cpython/pull/109788#commits-pushed-6c6556c
https://github.com/serhiy-storchaka
More closely reproduce current results.https://github.com/python/cpython/pull/109788/commits/6c6556c59fbbd72ae1ad22454c24cc14c83d64ea
6c6556chttps://github.com/python/cpython/pull/109788/commits/6c6556c59fbbd72ae1ad22454c24cc14c83d64ea
https://github.com/serhiy-storchaka
Add tests for multiple re-entrancy points.https://github.com/python/cpython/pull/109788/commits/5ffe65a3eeb1d6351c4bbf7e6a7f47b4bfe05e9c
5ffe65ahttps://github.com/python/cpython/pull/109788/commits/5ffe65a3eeb1d6351c4bbf7e6a7f47b4bfe05e9c
https://github.com/serhiy-storchaka
serhiy-storchakahttps://github.com/serhiy-storchaka
Sep 23, 2023 https://github.com/python/cpython/pull/109788#pullrequestreview-1640899549
View reviewed changes https://github.com/python/cpython/pull/109788/files/5ffe65a3eeb1d6351c4bbf7e6a7f47b4bfe05e9c
Lib/test/test_itertools.pyhttps://github.com/python/cpython/pull/109788/files/5ffe65a3eeb1d6351c4bbf7e6a7f47b4bfe05e9c#diff-9abbaeca99112e9e04b554726bff97b76030eb982f39e591be77be8ef14149e5
Please reload this pagehttps://github.com/python/cpython/pull/109788
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rhettingerhttps://github.com/rhettinger
Sep 23, 2023https://github.com/python/cpython/pull/109788#issuecomment-1732374404
Please reload this pagehttps://github.com/python/cpython/pull/109788
https://github.com/serhiy-storchaka
serhiy-storchakahttps://github.com/serhiy-storchaka
Sep 23, 2023https://github.com/python/cpython/pull/109788#issuecomment-1732394676
Please reload this pagehttps://github.com/python/cpython/pull/109788
serhiy-storchakahttps://github.com/serhiy-storchaka
September 24, 2023 09:20https://github.com/python/cpython/pull/109788#commits-pushed-4c44791
https://github.com/serhiy-storchaka
Yet more closely reproduce current results.https://github.com/python/cpython/pull/109788/commits/4c4479129ada05fed9b426a5cd653c7c4034b4f2
4c44791https://github.com/python/cpython/pull/109788/commits/4c4479129ada05fed9b426a5cd653c7c4034b4f2
https://github.com/serhiy-storchaka
Fix a crash due to it holding borrowed reference.https://github.com/python/cpython/pull/109788/commits/b047b2a79033baba5b6ec417d5cca5e36ebcf4d7
b047b2ahttps://github.com/python/cpython/pull/109788/commits/b047b2a79033baba5b6ec417d5cca5e36ebcf4d7
https://github.com/serhiy-storchaka
serhiy-storchakahttps://github.com/serhiy-storchaka
Sep 24, 2023https://github.com/python/cpython/pull/109788#issuecomment-1732512275
Please reload this pagehttps://github.com/python/cpython/pull/109788
https://github.com/serhiy-storchaka
serhiy-storchakahttps://github.com/serhiy-storchaka
Nov 27, 2023https://github.com/python/cpython/pull/109788#issuecomment-1828475178
@rhettingerhttps://github.com/rhettinger
Please reload this pagehttps://github.com/python/cpython/pull/109788
https://github.com/serhiy-storchaka
Update 2023-09-23-14-40-51.gh-issue-109786.UX3pKv.rsthttps://github.com/python/cpython/pull/109788/commits/37bc689f8915087dcd33cd4a891c359f587909c8
37bc689https://github.com/python/cpython/pull/109788/commits/37bc689f8915087dcd33cd4a891c359f587909c8
https://github.com/serhiy-storchaka
serhiy-storchakahttps://github.com/serhiy-storchaka
December 4, 2023 11:23https://github.com/python/cpython/pull/109788#event-11137756642
https://github.com/serhiy-storchaka
serhiy-storchakahttps://github.com/serhiy-storchaka
6ca9d3ehttps://github.com/python/cpython/commit/6ca9d3e0173c38e2eac50367b187d4c1d43f9892
Dec 4, 2023https://github.com/python/cpython/pull/109788#event-11138002804
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
awaiting review https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22awaiting%20review%22
Dec 4, 2023https://github.com/python/cpython/pull/109788#event-11138003320
https://github.com/apps/miss-islington-app
miss-islington-apphttps://github.com/apps/miss-islington-app
Dec 4, 2023https://github.com/python/cpython/pull/109788#issuecomment-1838470902
@serhiy-storchakahttps://github.com/serhiy-storchaka
Please reload this pagehttps://github.com/python/cpython/pull/109788
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
Dec 4, 2023https://github.com/python/cpython/pull/109788#issuecomment-1838471106
GH-112699https://github.com/python/cpython/pull/112699
3.12 branchhttps://github.com/python/cpython/tree/3.12
Please reload this pagehttps://github.com/python/cpython/pull/109788
miss-islingtonhttps://github.com/miss-islington
Dec 4, 2023 https://github.com/python/cpython/pull/109788#ref-commit-b470925
https://github.com/serhiy-storchaka
https://github.com/miss-islington
pythongh-109786https://github.com/python/cpython/issues/109786
: Fix leaks and crash when re-enter itertools.pairwise…https://github.com/miss-islington/cpython/commit/b470925067c97ae6aadd8b33920e8ec0cf66493a
b470925https://github.com/miss-islington/cpython/commit/b470925067c97ae6aadd8b33920e8ec0cf66493a
pythonGH-109788https://github.com/python/cpython/pull/109788
6ca9d3ehttps://github.com/miss-islington/cpython/commit/6ca9d3e0173c38e2eac50367b187d4c1d43f9892
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
needs backport to 3.12 https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22needs%20backport%20to%203.12%22
Dec 4, 2023https://github.com/python/cpython/pull/109788#event-11138005021
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
Dec 4, 2023https://github.com/python/cpython/pull/109788#issuecomment-1838471220
GH-112700https://github.com/python/cpython/pull/112700
3.11 branchhttps://github.com/python/cpython/tree/3.11
Please reload this pagehttps://github.com/python/cpython/pull/109788
miss-islingtonhttps://github.com/miss-islington
Dec 4, 2023 https://github.com/python/cpython/pull/109788#ref-commit-838a9d1
https://github.com/serhiy-storchaka
https://github.com/miss-islington
pythongh-109786https://github.com/python/cpython/issues/109786
: Fix leaks and crash when re-enter itertools.pairwise…https://github.com/miss-islington/cpython/commit/838a9d1ade78c0464cf5c6171dcb440b283d0442
838a9d1https://github.com/miss-islington/cpython/commit/838a9d1ade78c0464cf5c6171dcb440b283d0442
pythonGH-109788https://github.com/python/cpython/pull/109788
6ca9d3ehttps://github.com/miss-islington/cpython/commit/6ca9d3e0173c38e2eac50367b187d4c1d43f9892
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
needs backport to 3.11 https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22needs%20backport%20to%203.11%22
Dec 4, 2023https://github.com/python/cpython/pull/109788#event-11138005855
serhiy-storchakahttps://github.com/serhiy-storchaka
Dec 4, 2023 https://github.com/python/cpython/pull/109788#ref-commit-55896f4
https://github.com/miss-islington
https://github.com/serhiy-storchaka
[3.12]https://github.com/python/cpython/commit/55896f470b05a1d526607a6423014fffc436eefc
gh-109786https://github.com/python/cpython/issues/109786
: Fix leaks and crash when re-enter itertools.pairwis…https://github.com/python/cpython/commit/55896f470b05a1d526607a6423014fffc436eefc
55896f4https://github.com/python/cpython/commit/55896f470b05a1d526607a6423014fffc436eefc
GH-109788https://github.com/python/cpython/pull/109788
GH-112699https://github.com/python/cpython/pull/112699
6ca9d3ehttps://github.com/python/cpython/commit/6ca9d3e0173c38e2eac50367b187d4c1d43f9892
serhiy-storchakahttps://github.com/serhiy-storchaka
Dec 4, 2023 https://github.com/python/cpython/pull/109788#ref-commit-e3d380d
https://github.com/miss-islington
https://github.com/serhiy-storchaka
[3.11]https://github.com/python/cpython/commit/e3d380ded6efd25d60a21b7eb913142e86153e33
gh-109786https://github.com/python/cpython/issues/109786
: Fix leaks and crash when re-enter itertools.pairwis…https://github.com/python/cpython/commit/e3d380ded6efd25d60a21b7eb913142e86153e33
e3d380dhttps://github.com/python/cpython/commit/e3d380ded6efd25d60a21b7eb913142e86153e33
GH-109788https://github.com/python/cpython/pull/109788
GH-112700https://github.com/python/cpython/pull/112700
6ca9d3ehttps://github.com/python/cpython/commit/6ca9d3e0173c38e2eac50367b187d4c1d43f9892
aiskhttps://github.com/aisk
Feb 11, 2024 https://github.com/python/cpython/pull/109788#ref-commit-b92fee0
https://github.com/serhiy-storchaka
https://github.com/aisk
pythongh-109786https://github.com/python/cpython/issues/109786
: Fix leaks and crash when re-enter itertools.pairwise…https://github.com/aisk/cpython/commit/b92fee0a70a4d67c9bbdb499998b71991b3a5b92
b92fee0https://github.com/aisk/cpython/commit/b92fee0a70a4d67c9bbdb499998b71991b3a5b92
pythonGH-109788https://github.com/python/cpython/pull/109788
Glyphackhttps://github.com/Glyphack
Sep 2, 2024 https://github.com/python/cpython/pull/109788#ref-commit-ea831c5
https://github.com/serhiy-storchaka
https://github.com/Glyphack
pythongh-109786https://github.com/python/cpython/issues/109786
: Fix leaks and crash when re-enter itertools.pairwise…https://github.com/Glyphack/cpython/commit/ea831c51555aa477f1b6680045b82c5fb04895d6
ea831c5https://github.com/Glyphack/cpython/commit/ea831c51555aa477f1b6680045b82c5fb04895d6
pythonGH-109788https://github.com/python/cpython/pull/109788
https://github.com/serhiy-storchaka
serhiy-storchakahttps://github.com/serhiy-storchaka
October 21, 2024 13:47https://github.com/python/cpython/pull/109788#event-14765226965
mattiphttps://github.com/mattip
Mar 28, 2026 https://github.com/python/cpython/pull/109788#ref-commit-8597510
https://github.com/claude
https://github.com/mattip
make itertools.pairwise_reenter reentrant (issuehttps://github.com/pypy/pypy/commit/859751086497759cf21d6bcbf2e6d63074c2054b
python/cpython#109788https://github.com/python/cpython/pull/109788
)https://github.com/pypy/pypy/commit/859751086497759cf21d6bcbf2e6d63074c2054b
8597510https://github.com/pypy/pypy/commit/859751086497759cf21d6bcbf2e6d63074c2054b
eendebakpthttps://github.com/eendebakpt
May 28, 2026 https://github.com/python/cpython/pull/109788#ref-commit-66da5fc
https://github.com/eendebakpt
https://github.com/claude
pythongh-149557https://github.com/python/cpython/issues/149557
: Raise RuntimeError on re-entrant itertools.pairwise.…https://github.com/eendebakpt/cpython/commit/66da5fc8bc9a71d057c333aa71ef0a40ae2747d4
66da5fchttps://github.com/eendebakpt/cpython/commit/66da5fc8bc9a71d057c333aa71ef0a40ae2747d4
pythongh-109788https://github.com/python/cpython/pull/109788
eendebakpthttps://github.com/eendebakpt
May 29, 2026 https://github.com/python/cpython/pull/109788#ref-commit-710b58c
https://github.com/eendebakpt
https://github.com/claude
pythongh-149557https://github.com/python/cpython/issues/149557
,https://github.com/eendebakpt/cpython/commit/710b58c6823f16610a48c18f11b7d1c4291e81b7
pythongh-123471https://github.com/python/cpython/issues/123471
: Make itertools.pairwise safe under …https://github.com/eendebakpt/cpython/commit/710b58c6823f16610a48c18f11b7d1c4291e81b7
710b58chttps://github.com/eendebakpt/cpython/commit/710b58c6823f16610a48c18f11b7d1c4291e81b7
pythongh-149557https://github.com/python/cpython/issues/149557
pythongh-109788https://github.com/python/cpython/pull/109788
eendebakpthttps://github.com/eendebakpt
May 29, 2026 https://github.com/python/cpython/pull/109788#ref-commit-103c022
https://github.com/eendebakpt
https://github.com/claude
pythongh-149557https://github.com/python/cpython/issues/149557
,https://github.com/eendebakpt/cpython/commit/103c0220068675894d16c9fde7aceaa6452479b7
pythongh-123471https://github.com/python/cpython/issues/123471
: Make itertools.pairwise safe under …https://github.com/eendebakpt/cpython/commit/103c0220068675894d16c9fde7aceaa6452479b7
103c022https://github.com/eendebakpt/cpython/commit/103c0220068675894d16c9fde7aceaa6452479b7
pythongh-149557https://github.com/python/cpython/issues/149557
pythongh-109788https://github.com/python/cpython/pull/109788
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