René's URL Explorer Experiment


Title: gh-143543: Fix re-entrant use-after-free in itertools.groupby by VanshAgarwal24036 · Pull Request #143738 · python/cpython · GitHub

Open Graph Title: gh-143543: Fix re-entrant use-after-free in itertools.groupby by VanshAgarwal24036 · Pull Request #143738 · python/cpython

X Title: gh-143543: Fix re-entrant use-after-free in itertools.groupby by VanshAgarwal24036 · Pull Request #143738 · python/cpython

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

Open Graph Description: Fix a use-after-free in itertools.groupby when a user-defined eq re-enters next(groupby) during key comparison. groupby_next() compared borrowed references to currkey and tgtkey using PyObject_Rich...

X Description: Fix a use-after-free in itertools.groupby when a user-defined eq re-enters next(groupby) during key comparison. groupby_next() compared borrowed references to currkey and tgtkey using PyObject_Rich...

Opengraph URL: https://github.com/python/cpython/pull/143738

X: @github

direct link

Domain: github.com

route-pattern/_view_fragments/voltron/pull_requests/show/:user_id/:repository/:id/pull_request_layout(.:format)
route-controllervoltron_pull_requests_fragments
route-actionpull_request_layout
fetch-noncev2:b1ad9dce-0105-5677-76fa-243b00c8e3c6
current-catalog-service-hashae870bc5e265a340912cde392f23dad3671a0a881730ffdadd82f2f57d81641b
request-idA4D6:1748BD:433DEC1:5EECF2F:6A56DAFF
html-safe-nonce40946d7ecf1a9ea1fc207d34dbf6ce7ed978e5f832ff5782d13e8ea70821ec87
visitor-payloadeyJyZWZlcnJlciI6IiIsInJlcXVlc3RfaWQiOiJBNEQ2OjE3NDhCRDo0MzNERUMxOjVFRUNGMkY6NkE1NkRBRkYiLCJ2aXNpdG9yX2lkIjoiMjgzMDE3MDExMDIzMjU1MDE0MyIsInJlZ2lvbl9lZGdlIjoiaWFkIiwicmVnaW9uX3JlbmRlciI6ImlhZCJ9
visitor-hmac6c59b009812a469295b343cc4658ee32ca86dba97806787a61a8eb9878b4841f
hovercard-subject-tagpull_request:3166591033
github-keyboard-shortcutsrepository,pull-request-list,pull-request-conversation,pull-request-files-changed,copilot
google-site-verificationApib7-x98H0j5cPqHWwSMm6dNU4GmODRoqxLiDzdx9I
octolytics-urlhttps://collector.github.com/github/collect
analytics-location///voltron/pull_requests_fragments/pull_request_layout
fb:app_id1401488693436528
apple-itunes-appapp-id=1477376905, app-argument=https://github.com/_view_fragments/voltron/pull_requests/show/python/cpython/143738/pull_request_layout
twitter:imagehttps://opengraph.githubassets.com/9e40da099ca98ed62bd706e8af61a538ba01ac1e5700237c935dad5d53314b60/python/cpython/pull/143738
twitter:cardsummary_large_image
og:imagehttps://opengraph.githubassets.com/9e40da099ca98ed62bd706e8af61a538ba01ac1e5700237c935dad5d53314b60/python/cpython/pull/143738
og:image:altFix a use-after-free in itertools.groupby when a user-defined eq re-enters next(groupby) during key comparison. groupby_next() compared borrowed references to currkey and tgtkey using PyObject_Rich...
og:image:width1200
og:image:height600
og:site_nameGitHub
og:typeobject
og:author:usernameVanshAgarwal24036
hostnamegithub.com
expected-hostnamegithub.com
None5220a278731283038daf0ed00b41f06ef7ff9539020ecc806c5c5a0fb6bda25a
turbo-cache-controlno-cache
go-importgithub.com/python/cpython git https://github.com/python/cpython.git
octolytics-dimension-user_id1525981
octolytics-dimension-user_loginpython
octolytics-dimension-repository_id81598961
octolytics-dimension-repository_nwopython/cpython
octolytics-dimension-repository_publictrue
octolytics-dimension-repository_is_forkfalse
octolytics-dimension-repository_network_root_id81598961
octolytics-dimension-repository_network_root_nwopython/cpython
turbo-body-classeslogged-out env-production page-responsive
disable-turbofalse
browser-stats-urlhttps://api.github.com/_private/browser/stats
browser-errors-urlhttps://api.github.com/_private/browser/errors
release8684ae1a81cd3e4ef219b241179982bbda1a5b1f
ui-targetfull
theme-color#1e2327
color-schemelight dark

Links:

Skip to contenthttps://github.com/python/cpython/pull/143738#start-of-content
https://github.com/
Sign in https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fpython%2Fcpython%2Fpull%2F143738
GitHub CopilotWrite better code with AIhttps://github.com/features/copilot
GitHub Copilot appDirect agents from issue to mergehttps://github.com/features/ai/github-app
MCP RegistryNewIntegrate external toolshttps://github.com/mcp
ActionsAutomate any workflowhttps://github.com/features/actions
CodespacesInstant dev environmentshttps://github.com/features/codespaces
IssuesPlan and track workhttps://github.com/features/issues
Code ReviewManage code changeshttps://github.com/features/code-review
GitHub Advanced SecurityFind and fix vulnerabilitieshttps://github.com/security/advanced-security
Code securitySecure your code as you buildhttps://github.com/security/advanced-security/code-security
Secret protectionStop leaks before they starthttps://github.com/security/advanced-security/secret-protection
Why GitHubhttps://github.com/why-github
Documentationhttps://docs.github.com
Bloghttps://github.blog
Changeloghttps://github.blog/changelog
Marketplacehttps://github.com/marketplace
View all featureshttps://github.com/features
Enterpriseshttps://github.com/enterprise
Small and medium teamshttps://github.com/team
Startupshttps://github.com/enterprise/startups
Nonprofitshttps://github.com/solutions/industry/nonprofits
App Modernizationhttps://github.com/solutions/use-case/app-modernization
DevSecOpshttps://github.com/solutions/use-case/devsecops
DevOpshttps://github.com/solutions/use-case/devops
CI/CDhttps://github.com/solutions/use-case/ci-cd
View all use caseshttps://github.com/solutions/use-case
Healthcarehttps://github.com/solutions/industry/healthcare
Financial serviceshttps://github.com/solutions/industry/financial-services
Manufacturinghttps://github.com/solutions/industry/manufacturing
Governmenthttps://github.com/solutions/industry/government
View all industrieshttps://github.com/solutions/industry
View all solutionshttps://github.com/solutions
AIhttps://github.com/resources/articles?topic=ai
Software Developmenthttps://github.com/resources/articles?topic=software-development
DevOpshttps://github.com/resources/articles?topic=devops
Securityhttps://github.com/resources/articles?topic=security
View all topicshttps://github.com/resources/articles
Customer storieshttps://github.com/customer-stories
Events & webinarshttps://github.com/resources/events
Ebooks & reportshttps://github.com/resources/whitepapers
Business insightshttps://github.com/solutions/executive-insights
GitHub Skillshttps://skills.github.com
Documentationhttps://docs.github.com
Customer supporthttps://support.github.com
Community forumhttps://github.com/orgs/community/discussions
Trust centerhttps://github.com/trust-center
Partnershttps://github.com/partners
View all resourceshttps://github.com/resources
GitHub SponsorsFund open source developershttps://github.com/open-source/sponsors
Security Labhttps://securitylab.github.com
Maintainer Communityhttps://maintainers.github.com
Acceleratorhttps://github.com/open-source/accelerator
GitHub Starshttps://stars.github.com
Archive Programhttps://archiveprogram.github.com
Topicshttps://github.com/topics
Trendinghttps://github.com/trending
Collectionshttps://github.com/collections
Enterprise platformAI-powered developer platformhttps://github.com/enterprise
GitHub Advanced SecurityEnterprise-grade security featureshttps://github.com/security/advanced-security
Copilot for BusinessEnterprise-grade AI featureshttps://github.com/features/copilot/copilot-business
Premium SupportEnterprise-grade 24/7 supporthttps://github.com/enterprise/premium-support
Pricinghttps://github.com/pricing
Search syntax tipshttps://docs.github.com/search-github/github-code-search/understanding-github-code-search-syntax
documentationhttps://docs.github.com/search-github/github-code-search/understanding-github-code-search-syntax
Sign in https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fpython%2Fcpython%2Fpull%2F143738
Sign up https://github.com/signup?ref_cta=Sign+up&ref_loc=header+logged+out&ref_page=%2F%3Cuser-name%3E%2F%3Crepo-name%3E%2Fvoltron%2Fpull_requests_fragments%2Fpull_request_layout&source=header-repo&source_repo=python%2Fcpython
Reloadhttps://github.com/python/cpython/pull/143738
Reloadhttps://github.com/python/cpython/pull/143738
Reloadhttps://github.com/python/cpython/pull/143738
Please reload this pagehttps://github.com/python/cpython/pull/143738
python https://github.com/python
cpythonhttps://github.com/python/cpython
Please reload this pagehttps://github.com/python/cpython/pull/143738
Notifications https://github.com/login?return_to=%2Fpython%2Fcpython
Fork 35k https://github.com/login?return_to=%2Fpython%2Fcpython
Star 73.8k https://github.com/login?return_to=%2Fpython%2Fcpython
Code https://github.com/python/cpython
Issues 5k+ https://github.com/python/cpython/issues
Pull requests 2.3k https://github.com/python/cpython/pulls
Actions https://github.com/python/cpython/actions
Projects https://github.com/python/cpython/projects
Security and quality 0 https://github.com/python/cpython/security
Insights https://github.com/python/cpython/pulse
Code https://github.com/python/cpython
Issues https://github.com/python/cpython/issues
Pull requests https://github.com/python/cpython/pulls
Actions https://github.com/python/cpython/actions
Projects https://github.com/python/cpython/projects
Security and quality https://github.com/python/cpython/security
Insights https://github.com/python/cpython/pulse
encukouhttps://github.com/encukou
python:mainhttps://github.com/python/cpython/tree/main
VanshAgarwal24036:gh-143543-groupby-uafhttps://github.com/VanshAgarwal24036/cpython/tree/gh-143543-groupby-uaf
Conversationhttps://github.com/python/cpython/pull/143738
Commits22 (22)https://github.com/python/cpython/pull/143738/commits
Checkshttps://github.com/python/cpython/pull/143738/checks
Files changedhttps://github.com/python/cpython/pull/143738/files
gh-143543: Fix re-entrant use-after-free in itertools.groupbyhttps://github.com/python/cpython/pull/143738#top
encukouhttps://github.com/encukou
python:mainhttps://github.com/python/cpython/tree/main
VanshAgarwal24036:gh-143543-groupby-uafhttps://github.com/VanshAgarwal24036/cpython/tree/gh-143543-groupby-uaf
https://github.com/VanshAgarwal24036
VanshAgarwal24036https://github.com/VanshAgarwal24036
Jan 12, 2026https://github.com/python/cpython/pull/143738#issue-3805149453
Please reload this pagehttps://github.com/python/cpython/pull/143738
Use-after-free in itertools.groupby via re-entrant key comparison through __eq__ #143543https://github.com/python/cpython/issues/143543
Please reload this pagehttps://github.com/python/cpython/pull/143738
https://github.com/VanshAgarwal24036
VanshAgarwal24036https://github.com/VanshAgarwal24036
rhettingerhttps://github.com/rhettinger
code ownerhttps://github.com/python/cpython/blob/1de46715ec50c7ae0b8e8671287239771c121e68/.github/CODEOWNERS#L509
January 12, 2026 16:54https://github.com/python/cpython/pull/143738#event-21994667650
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
Jan 12, 2026 https://github.com/python/cpython/pull/143738#ref-issue-3791395627
Use-after-free in itertools.groupby via re-entrant key comparison through __eq__ #143543 https://github.com/python/cpython/issues/143543
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
Jan 12, 2026https://github.com/python/cpython/pull/143738#event-21994670440
https://github.com/VanshAgarwal24036
VanshAgarwal24036https://github.com/VanshAgarwal24036
Jan 12, 2026https://github.com/python/cpython/pull/143738#issuecomment-3739533243
Please reload this pagehttps://github.com/python/cpython/pull/143738
https://github.com/picnixz
picnixzhttps://github.com/picnixz
Jan 12, 2026https://github.com/python/cpython/pull/143738#issuecomment-3739809443
Please reload this pagehttps://github.com/python/cpython/pull/143738
https://github.com/VanshAgarwal24036
VanshAgarwal24036https://github.com/VanshAgarwal24036
Jan 13, 2026https://github.com/python/cpython/pull/143738#issuecomment-3741652654
Please reload this pagehttps://github.com/python/cpython/pull/143738
VanshAgarwal24036https://github.com/VanshAgarwal24036
January 13, 2026 09:14https://github.com/python/cpython/pull/143738#commits-pushed-e898626
https://github.com/VanshAgarwal24036
pythongh-143543https://github.com/python/cpython/issues/143543
: Fix re-entrant use-after-free in itertools.groupbyhttps://github.com/python/cpython/pull/143738/commits/e898626432a811fb000251efc12927cbd7c57836
e898626https://github.com/python/cpython/pull/143738/commits/e898626432a811fb000251efc12927cbd7c57836
https://github.com/VanshAgarwal24036
Fix whitespace per prekhttps://github.com/python/cpython/pull/143738/commits/ba974bca279ae55feadbd099733cb61f82027d1e
ba974bchttps://github.com/python/cpython/pull/143738/commits/ba974bca279ae55feadbd099733cb61f82027d1e
https://github.com/VanshAgarwal24036
Add NEWS entry for itertools.groupby crash fixhttps://github.com/python/cpython/pull/143738/commits/0debc2a0bd1fd2e3a7f7036e9215289733a37e34
0debc2ahttps://github.com/python/cpython/pull/143738/commits/0debc2a0bd1fd2e3a7f7036e9215289733a37e34
https://github.com/VanshAgarwal24036
Fix NEWS filename forhttps://github.com/python/cpython/pull/143738/commits/8d831767d3ee54448b3c8d0e038a0fc0258a8ff6
pythongh-143543https://github.com/python/cpython/issues/143543
8d83176https://github.com/python/cpython/pull/143738/commits/8d831767d3ee54448b3c8d0e038a0fc0258a8ff6
https://github.com/VanshAgarwal24036
Fix NEWS entry type forhttps://github.com/python/cpython/pull/143738/commits/ca932bf3433216f30b038fc47ced40082129d50a
pythongh-143543https://github.com/python/cpython/issues/143543
ca932bfhttps://github.com/python/cpython/pull/143738/commits/ca932bf3433216f30b038fc47ced40082129d50a
https://github.com/VanshAgarwal24036
Remove incorrect NEWS files forhttps://github.com/python/cpython/pull/143738/commits/0e86303246ba709a7ecfbd871214899171ef8642
pythongh-143543https://github.com/python/cpython/issues/143543
0e86303https://github.com/python/cpython/pull/143738/commits/0e86303246ba709a7ecfbd871214899171ef8642
https://github.com/skirpichev
skirpichevhttps://github.com/skirpichev
Jan 13, 2026 https://github.com/python/cpython/pull/143738#pullrequestreview-3653659453
View reviewed changes https://github.com/python/cpython/pull/143738/files
skirpichevhttps://github.com/skirpichev
https://github.com/python/cpython/pull/143738#pullrequestreview-3653659453
Learn morehttps://docs.github.com/articles/managing-disruptive-comments/#hiding-a-comment
@VanshAgarwal24036https://github.com/VanshAgarwal24036
https://devguide.python.org/core-team/committing/#how-to-add-a-news-entryhttps://devguide.python.org/core-team/committing/#how-to-add-a-news-entry
Please reload this pagehttps://github.com/python/cpython/pull/143738
Modules/itertoolsmodule.chttps://github.com/python/cpython/pull/143738/files#diff-dc27cbdf2b9f6e5236cade13cf301d352a7abd2a8b1988f2517d6f5b7a30c201
Please reload this pagehttps://github.com/python/cpython/pull/143738
Misc/NEWS.d/next/Library/gh-143543.bugfix.rsthttps://github.com/python/cpython/pull/143738/files#diff-efb53dc1785fb6460ebde7eb3b189dc6b57494ec2cea05d51a990185ab1410d3
Please reload this pagehttps://github.com/python/cpython/pull/143738
https://github.com/VanshAgarwal24036
VanshAgarwal24036https://github.com/VanshAgarwal24036
force-pushedhttps://github.com/python/cpython/compare/3f86c1298f53a18b65a2fa9d272e4575a040577b..0e86303246ba709a7ecfbd871214899171ef8642
3f86c12https://github.com/python/cpython/commit/3f86c1298f53a18b65a2fa9d272e4575a040577b
0e86303https://github.com/python/cpython/commit/0e86303246ba709a7ecfbd871214899171ef8642
Compare https://github.com/python/cpython/compare/3f86c1298f53a18b65a2fa9d272e4575a040577b..0e86303246ba709a7ecfbd871214899171ef8642
January 13, 2026 03:48https://github.com/python/cpython/pull/143738#event-22005398407
https://github.com/skirpichev
skirpichevhttps://github.com/skirpichev
Jan 13, 2026https://github.com/python/cpython/pull/143738#issuecomment-3741753936
please avoid squashing or amending history and then force-pushing to the PRhttps://devguide.python.org/getting-started/pull-request-lifecycle/#don-t-force-push
Please reload this pagehttps://github.com/python/cpython/pull/143738
https://github.com/VanshAgarwal24036
Avoid borrowed references during groupby key comparisonhttps://github.com/python/cpython/pull/143738/commits/740218ccfe96ab468263a0f5c09a8c54628e7e44
740218chttps://github.com/python/cpython/pull/143738/commits/740218ccfe96ab468263a0f5c09a8c54628e7e44
https://github.com/VanshAgarwal24036
VanshAgarwal24036https://github.com/VanshAgarwal24036
force-pushedhttps://github.com/python/cpython/compare/d509c2c0f29756e549254089390b3f966ec02b17..740218ccfe96ab468263a0f5c09a8c54628e7e44
d509c2chttps://github.com/python/cpython/commit/d509c2c0f29756e549254089390b3f966ec02b17
740218chttps://github.com/python/cpython/commit/740218ccfe96ab468263a0f5c09a8c54628e7e44
Compare https://github.com/python/cpython/compare/d509c2c0f29756e549254089390b3f966ec02b17..740218ccfe96ab468263a0f5c09a8c54628e7e44
January 13, 2026 03:55https://github.com/python/cpython/pull/143738#event-22005512732
https://github.com/skirpichev
skirpichevhttps://github.com/skirpichev
Jan 13, 2026https://github.com/python/cpython/pull/143738#issuecomment-3741801874
@VanshAgarwal24036https://github.com/VanshAgarwal24036
Please reload this pagehttps://github.com/python/cpython/pull/143738
https://github.com/VanshAgarwal24036
Clarify NEWS entry wordinghttps://github.com/python/cpython/pull/143738/commits/e3a54be56f0739c46983285a7825c35e80a1367c
e3a54behttps://github.com/python/cpython/pull/143738/commits/e3a54be56f0739c46983285a7825c35e80a1367c
https://github.com/VanshAgarwal24036
VanshAgarwal24036https://github.com/VanshAgarwal24036
Jan 13, 2026https://github.com/python/cpython/pull/143738#issuecomment-3741817534
Please reload this pagehttps://github.com/python/cpython/pull/143738
VanshAgarwal24036https://github.com/VanshAgarwal24036
January 13, 2026 10:25https://github.com/python/cpython/pull/143738#commits-pushed-9983345
https://github.com/VanshAgarwal24036
Fix refcounting during groupby key comparisonhttps://github.com/python/cpython/pull/143738/commits/998334526afc8d636572e30a831697aaf6c2e70b
9983345https://github.com/python/cpython/pull/143738/commits/998334526afc8d636572e30a831697aaf6c2e70b
https://github.com/VanshAgarwal24036
Add NEWS entry via blurb for itertools.groupby crashhttps://github.com/python/cpython/pull/143738/commits/1ea51c06d7afcdbded3acf9d50e4a90736c615a9
1ea51c0https://github.com/python/cpython/pull/143738/commits/1ea51c06d7afcdbded3acf9d50e4a90736c615a9
https://github.com/VanshAgarwal24036
Fix duplicate variable declarations in groupby_nexthttps://github.com/python/cpython/pull/143738/commits/336c36748ab272ce0f980b19121084338d72772a
336c367https://github.com/python/cpython/pull/143738/commits/336c36748ab272ce0f980b19121084338d72772a
https://github.com/VanshAgarwal24036
itertools: hold strong references during groupby key comparisonhttps://github.com/python/cpython/pull/143738/commits/9cbe1a6c3651ddde58eb9b388ff861a39205a058
9cbe1a6https://github.com/python/cpython/pull/143738/commits/9cbe1a6c3651ddde58eb9b388ff861a39205a058
https://github.com/skirpichev
skirpichevhttps://github.com/skirpichev
Jan 13, 2026 https://github.com/python/cpython/pull/143738#pullrequestreview-3654815633
View reviewed changes https://github.com/python/cpython/pull/143738/files/9cbe1a6c3651ddde58eb9b388ff861a39205a058
Modules/itertoolsmodule.chttps://github.com/python/cpython/pull/143738/files/9cbe1a6c3651ddde58eb9b388ff861a39205a058#diff-dc27cbdf2b9f6e5236cade13cf301d352a7abd2a8b1988f2517d6f5b7a30c201
Please reload this pagehttps://github.com/python/cpython/pull/143738
https://github.com/VanshAgarwal24036
VanshAgarwal24036https://github.com/VanshAgarwal24036
skirpichevhttps://github.com/skirpichev
January 13, 2026 17:58https://github.com/python/cpython/pull/143738#event-22023628185
https://github.com/skirpichev
skirpichevhttps://github.com/skirpichev
January 14, 2026 01:14https://github.com/python/cpython/pull/143738#event-22031025456
https://github.com/VanshAgarwal24036
Clarify re-entrant groupby key comparison commenthttps://github.com/python/cpython/pull/143738/commits/8c61450233d9cea60df098e63e9de4aead7d224c
8c61450https://github.com/python/cpython/pull/143738/commits/8c61450233d9cea60df098e63e9de4aead7d224c
https://github.com/VanshAgarwal24036
VanshAgarwal24036https://github.com/VanshAgarwal24036
Jan 14, 2026https://github.com/python/cpython/pull/143738#issuecomment-3747519593
Please reload this pagehttps://github.com/python/cpython/pull/143738
https://github.com/VanshAgarwal24036
VanshAgarwal24036https://github.com/VanshAgarwal24036
skirpichevhttps://github.com/skirpichev
January 14, 2026 12:20https://github.com/python/cpython/pull/143738#event-22042012967
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
awaiting core review https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22awaiting%20core%20review%22
Jan 15, 2026https://github.com/python/cpython/pull/143738#event-22057062375
https://github.com/picnixz
picnixzhttps://github.com/picnixz
Jan 15, 2026 https://github.com/python/cpython/pull/143738#pullrequestreview-3663979193
View reviewed changes https://github.com/python/cpython/pull/143738/files/e42b9b419c30f47177b62188fbc9c6d287f4f801
Modules/itertoolsmodule.chttps://github.com/python/cpython/pull/143738/files/e42b9b419c30f47177b62188fbc9c6d287f4f801#diff-dc27cbdf2b9f6e5236cade13cf301d352a7abd2a8b1988f2517d6f5b7a30c201
Please reload this pagehttps://github.com/python/cpython/pull/143738
https://github.com/VanshAgarwal24036
Remove extra Lineshttps://github.com/python/cpython/pull/143738/commits/e29c8184917ff9936d8ff58f3858e9de73f9ecea
e29c818https://github.com/python/cpython/pull/143738/commits/e29c8184917ff9936d8ff58f3858e9de73f9ecea
https://github.com/VanshAgarwal24036
VanshAgarwal24036https://github.com/VanshAgarwal24036
picnixzhttps://github.com/picnixz
January 15, 2026 08:34https://github.com/python/cpython/pull/143738#event-22063559721
https://github.com/picnixz
picnixzhttps://github.com/picnixz
Jan 15, 2026 https://github.com/python/cpython/pull/143738#pullrequestreview-3664779058
View reviewed changes https://github.com/python/cpython/pull/143738/files/e29c8184917ff9936d8ff58f3858e9de73f9ecea
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
awaiting merge https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22awaiting%20merge%22
awaiting core review https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22awaiting%20core%20review%22
Jan 15, 2026https://github.com/python/cpython/pull/143738#event-22065267508
https://github.com/encukou
encukouhttps://github.com/encukou
Feb 3, 2026 https://github.com/python/cpython/pull/143738#pullrequestreview-3745680811
View reviewed changes https://github.com/python/cpython/pull/143738/files/e29c8184917ff9936d8ff58f3858e9de73f9ecea
Lib/test/test_itertools.pyhttps://github.com/python/cpython/pull/143738/files/e29c8184917ff9936d8ff58f3858e9de73f9ecea#diff-9abbaeca99112e9e04b554726bff97b76030eb982f39e591be77be8ef14149e5
Please reload this pagehttps://github.com/python/cpython/pull/143738
VanshAgarwal24036https://github.com/VanshAgarwal24036
February 3, 2026 22:35https://github.com/python/cpython/pull/143738#commits-pushed-4be9d4f
https://github.com/VanshAgarwal24036
https://github.com/encukou
Update Lib/test/test_itertools.pyhttps://github.com/python/cpython/pull/143738/commits/4be9d4f3962a95354ce2d247cafd92bd8a5ae4af
4be9d4fhttps://github.com/python/cpython/pull/143738/commits/4be9d4f3962a95354ce2d247cafd92bd8a5ae4af
https://github.com/encukou
Merge branch 'main' intohttps://github.com/python/cpython/pull/143738/commits/b48d388d3e00a96505f828134734c52d2fadc848
pythongh-143543https://github.com/python/cpython/issues/143543
-groupby-uafhttps://github.com/python/cpython/pull/143738/commits/b48d388d3e00a96505f828134734c52d2fadc848
b48d388https://github.com/python/cpython/pull/143738/commits/b48d388d3e00a96505f828134734c52d2fadc848
https://github.com/encukou
encukouhttps://github.com/encukou
Feb 4, 2026https://github.com/python/cpython/pull/143738#issuecomment-3846340554
Please reload this pagehttps://github.com/python/cpython/pull/143738
https://github.com/bedevere-bot
bedevere-bothttps://github.com/bedevere-bot
Feb 4, 2026https://github.com/python/cpython/pull/143738#issuecomment-3846340869
@encukouhttps://github.com/encukou
b48d388https://github.com/python/cpython/commit/b48d388d3e00a96505f828134734c52d2fadc848
https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F143738%2Fmergehttps://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F143738%2Fmerge
Please reload this pagehttps://github.com/python/cpython/pull/143738
https://github.com/encukou
encukouhttps://github.com/encukou
a91b5c3https://github.com/python/cpython/commit/a91b5c3fb5aeaeda6a8e016378beb0e4a8b329e6
Feb 9, 2026https://github.com/python/cpython/pull/143738#event-22645282449
Please reload this pagehttps://github.com/python/cpython/pull/143738
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
awaiting merge https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22awaiting%20merge%22
Feb 9, 2026https://github.com/python/cpython/pull/143738#event-22645284814
https://github.com/encukou
encukouhttps://github.com/encukou
needs backport to 3.13 https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22needs%20backport%20to%203.13%22
needs backport to 3.14 https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22needs%20backport%20to%203.14%22
Feb 9, 2026https://github.com/python/cpython/pull/143738#event-22645293014
https://github.com/apps/miss-islington-app
miss-islington-apphttps://github.com/apps/miss-islington-app
Feb 9, 2026https://github.com/python/cpython/pull/143738#issuecomment-3871964474
@VanshAgarwal24036https://github.com/VanshAgarwal24036
@encukouhttps://github.com/encukou
Please reload this pagehttps://github.com/python/cpython/pull/143738
https://github.com/apps/miss-islington-app
miss-islington-apphttps://github.com/apps/miss-islington-app
Feb 9, 2026https://github.com/python/cpython/pull/143738#issuecomment-3871964475
@VanshAgarwal24036https://github.com/VanshAgarwal24036
@encukouhttps://github.com/encukou
Please reload this pagehttps://github.com/python/cpython/pull/143738
miss-islingtonhttps://github.com/miss-islington
Feb 9, 2026 https://github.com/python/cpython/pull/143738#ref-commit-97ea525
https://github.com/VanshAgarwal24036
https://github.com/skirpichev
https://github.com/encukou
https://github.com/miss-islington
pythongh-143543https://github.com/python/cpython/issues/143543
: Fix re-entrant use-after-free in itertools.groupby (https://github.com/miss-islington/cpython/commit/97ea525bf7abbced1d724e89659950e69b3d4ade
p…https://github.com/python/cpython/pull/143738
97ea525https://github.com/miss-islington/cpython/commit/97ea525bf7abbced1d724e89659950e69b3d4ade
…ythonGH-143738https://github.com/python/cpython/pull/143738
a91b5c3https://github.com/miss-islington/cpython/commit/a91b5c3fb5aeaeda6a8e016378beb0e4a8b329e6
miss-islingtonhttps://github.com/miss-islington
Feb 9, 2026 https://github.com/python/cpython/pull/143738#ref-commit-685598b
https://github.com/VanshAgarwal24036
https://github.com/skirpichev
https://github.com/encukou
https://github.com/miss-islington
pythongh-143543https://github.com/python/cpython/issues/143543
: Fix re-entrant use-after-free in itertools.groupby (https://github.com/miss-islington/cpython/commit/685598bb2283e035bc1fde42010f2c8de94f8198
p…https://github.com/python/cpython/pull/143738
685598bhttps://github.com/miss-islington/cpython/commit/685598bb2283e035bc1fde42010f2c8de94f8198
…ythonGH-143738https://github.com/python/cpython/pull/143738
a91b5c3https://github.com/miss-islington/cpython/commit/a91b5c3fb5aeaeda6a8e016378beb0e4a8b329e6
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
Feb 9, 2026https://github.com/python/cpython/pull/143738#issuecomment-3871966480
GH-144626https://github.com/python/cpython/pull/144626
3.14 branchhttps://github.com/python/cpython/tree/3.14
Please reload this pagehttps://github.com/python/cpython/pull/143738
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
needs backport to 3.14 https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22needs%20backport%20to%203.14%22
Feb 9, 2026https://github.com/python/cpython/pull/143738#event-22645304388
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
Feb 9, 2026https://github.com/python/cpython/pull/143738#issuecomment-3871966950
GH-144627https://github.com/python/cpython/pull/144627
3.13 branchhttps://github.com/python/cpython/tree/3.13
Please reload this pagehttps://github.com/python/cpython/pull/143738
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
needs backport to 3.13 https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22needs%20backport%20to%203.13%22
Feb 9, 2026https://github.com/python/cpython/pull/143738#event-22645306894
https://github.com/bedevere-bot
bedevere-bothttps://github.com/bedevere-bot
Feb 9, 2026https://github.com/python/cpython/pull/143738#issuecomment-3872007697
a91b5c3https://github.com/python/cpython/commit/a91b5c3fb5aeaeda6a8e016378beb0e4a8b329e6
the buildbot page in the devguidehttps://devguide.python.org/buildbots/
https://buildbot.python.org/#/builders/1609/builds/4821https://buildbot.python.org/#/builders/1609/builds/4821
a91b5c3https://github.com/python/cpython/commit/a91b5c3fb5aeaeda6a8e016378beb0e4a8b329e6
https://buildbot.python.org/#/builders/1609/builds/4821https://buildbot.python.org/#/builders/1609/builds/4821
Please reload this pagehttps://github.com/python/cpython/pull/143738
https://github.com/VanshAgarwal24036
VanshAgarwal24036https://github.com/VanshAgarwal24036
February 9, 2026 14:36https://github.com/python/cpython/pull/143738#event-22645973115
encukouhttps://github.com/encukou
Feb 10, 2026 https://github.com/python/cpython/pull/143738#ref-commit-13b3dd0
https://github.com/miss-islington
https://github.com/VanshAgarwal24036
https://github.com/skirpichev
https://github.com/encukou
[3.14]https://github.com/python/cpython/commit/13b3dd06229383d30d634ed01ba8e6b3e6640f90
gh-143543https://github.com/python/cpython/issues/143543
: Fix re-entrant use-after-free in itertools.groupby (https://github.com/python/cpython/commit/13b3dd06229383d30d634ed01ba8e6b3e6640f90
G…https://github.com/python/cpython/pull/143738
13b3dd0https://github.com/python/cpython/commit/13b3dd06229383d30d634ed01ba8e6b3e6640f90
…H-143738https://github.com/python/cpython/pull/143738
GH-144626https://github.com/python/cpython/pull/144626
a91b5c3https://github.com/python/cpython/commit/a91b5c3fb5aeaeda6a8e016378beb0e4a8b329e6
encukouhttps://github.com/encukou
Feb 10, 2026 https://github.com/python/cpython/pull/143738#ref-commit-d177460
https://github.com/miss-islington
https://github.com/VanshAgarwal24036
https://github.com/skirpichev
https://github.com/encukou
[3.13]https://github.com/python/cpython/commit/d177460b4317b3ef3fbbd795de63e39d83569a9b
gh-143543https://github.com/python/cpython/issues/143543
: Fix re-entrant use-after-free in itertools.groupby (https://github.com/python/cpython/commit/d177460b4317b3ef3fbbd795de63e39d83569a9b
G…https://github.com/python/cpython/pull/143738
d177460https://github.com/python/cpython/commit/d177460b4317b3ef3fbbd795de63e39d83569a9b
…H-143738https://github.com/python/cpython/pull/143738
GH-144627https://github.com/python/cpython/pull/144627
a91b5c3https://github.com/python/cpython/commit/a91b5c3fb5aeaeda6a8e016378beb0e4a8b329e6
thunder-codinghttps://github.com/thunder-coding
Feb 15, 2026 https://github.com/python/cpython/pull/143738#ref-commit-fbff564
https://github.com/VanshAgarwal24036
https://github.com/skirpichev
https://github.com/encukou
https://github.com/thunder-coding
pythongh-143543https://github.com/python/cpython/issues/143543
: Fix re-entrant use-after-free in itertools.groupby (https://github.com/thunder-coding/cpython/commit/fbff564f5d177a8139c8f645ad7b70478d042fc3
p…https://github.com/python/cpython/pull/143738
fbff564https://github.com/thunder-coding/cpython/commit/fbff564f5d177a8139c8f645ad7b70478d042fc3
…ythonGH-143738https://github.com/python/cpython/pull/143738
ljfphttps://github.com/ljfp
Apr 25, 2026 https://github.com/python/cpython/pull/143738#ref-commit-6d1fa9a
https://github.com/VanshAgarwal24036
https://github.com/skirpichev
https://github.com/encukou
https://github.com/ljfp
pythongh-143543https://github.com/python/cpython/issues/143543
: Fix re-entrant use-after-free in itertools.groupby (https://github.com/ljfp/cpython/commit/6d1fa9ae66e4b0f53bcbf7ec1df97f05c1c02086
p…https://github.com/python/cpython/pull/143738
6d1fa9ahttps://github.com/ljfp/cpython/commit/6d1fa9ae66e4b0f53bcbf7ec1df97f05c1c02086
…ythonGH-143738https://github.com/python/cpython/pull/143738
https://github.co/hiddenchars
https://github.com/python/cpython/pull/{{ revealButtonHref }}
Sign up for freehttps://github.com/join?source=comment-repo
Sign in to commenthttps://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fpython%2Fcpython%2Fpull%2F143738
https://github.com/encukou
encukou https://github.com/encukou
https://github.com/python/cpython/pull/143738/files/e29c8184917ff9936d8ff58f3858e9de73f9ecea
https://github.com/skirpichev
skirpichev https://github.com/skirpichev
https://github.com/python/cpython/pull/143738/files/e42b9b419c30f47177b62188fbc9c6d287f4f801
https://github.com/picnixz
picnixz https://github.com/picnixz
https://github.com/python/cpython/pull/143738/files/e29c8184917ff9936d8ff58f3858e9de73f9ecea
https://github.com/rhettinger
rhettinger https://github.com/rhettinger
Please reload this pagehttps://github.com/python/cpython/pull/143738
https://github.com/VanshAgarwal24036
https://github.com/picnixz
https://github.com/skirpichev
https://github.com/encukou
https://github.com/bedevere-bot
https://github.com
Termshttps://docs.github.com/site-policy/github-terms/github-terms-of-service
Privacyhttps://docs.github.com/site-policy/privacy-policies/github-privacy-statement
Securityhttps://github.com/security
Statushttps://www.githubstatus.com/
Communityhttps://github.community/
Docshttps://docs.github.com/
Contacthttps://support.github.com?tags=dotcom-footer

Viewport: width=device-width

URLs of crawlers that visited me.