René's URL Explorer Experiment


Title: gh-127545: Specify minimum PyGC_Head alignment to fix build failure by fthain · Pull Request #127546 · python/cpython · GitHub

Open Graph Title: gh-127545: Specify minimum PyGC_Head alignment to fix build failure by fthain · Pull Request #127546 · python/cpython

X Title: gh-127545: Specify minimum PyGC_Head alignment to fix build failure by fthain · Pull Request #127546 · python/cpython

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

Open Graph Description: As documented in InternalDocs/garbage_collector.md, the garbage collector stores flags in the least significant two bits of the _gc_prev pointer in struct PyGC_Head. Consequently, this pointer is o...

X Description: As documented in InternalDocs/garbage_collector.md, the garbage collector stores flags in the least significant two bits of the _gc_prev pointer in struct PyGC_Head. Consequently, this pointer is o...

Opengraph URL: https://github.com/python/cpython/pull/127546

X: @github

direct link

Domain: github.com

route-pattern/:user_id/:repository/pull/:id/checks(.:format)
route-controllerpull_requests
route-actionchecks
fetch-noncev2:fba822d0-7545-48e9-565a-3f666c546b74
current-catalog-service-hash87dc3bc62d9b466312751bfd5f889726f4f1337bdff4e8be7da7c93d6c00a25a
request-id8C24:FD8CA:3BFC482:55542D3:6A56AFD7
html-safe-nonce01c16b085123fa6de4d42bc11726b5a87dd4f94f01ab450536cf8441d60f6641
visitor-payloadeyJyZWZlcnJlciI6IiIsInJlcXVlc3RfaWQiOiI4QzI0OkZEOENBOjNCRkM0ODI6NTU1NDJEMzo2QTU2QUZENyIsInZpc2l0b3JfaWQiOiI5MTQ1Mjg2OTA4OTcyNTQzOTU5IiwicmVnaW9uX2VkZ2UiOiJpYWQiLCJyZWdpb25fcmVuZGVyIjoiaWFkIn0=
visitor-hmacce2edcc8f34e210ef5d3103ea725931f61292872da7ef34d9f79ed70b7bf2b53
hovercard-subject-tagpull_request:2211797565
github-keyboard-shortcutsrepository,pull-request-list,pull-request-conversation,pull-request-files-changed,checks,copilot
google-site-verificationApib7-x98H0j5cPqHWwSMm6dNU4GmODRoqxLiDzdx9I
octolytics-urlhttps://collector.github.com/github/collect
analytics-location///pull_requests/show/checks
fb:app_id1401488693436528
apple-itunes-appapp-id=1477376905, app-argument=https://github.com/python/cpython/pull/127546/checks
twitter:imagehttps://opengraph.githubassets.com/dfa6b06195a533565e95412fca710ec4ca7afd33e1594eb0d26b5f776e66b7a9/python/cpython/pull/127546
twitter:cardsummary_large_image
og:imagehttps://opengraph.githubassets.com/dfa6b06195a533565e95412fca710ec4ca7afd33e1594eb0d26b5f776e66b7a9/python/cpython/pull/127546
og:image:altAs documented in InternalDocs/garbage_collector.md, the garbage collector stores flags in the least significant two bits of the _gc_prev pointer in struct PyGC_Head. Consequently, this pointer is o...
og:image:width1200
og:image:height600
og:site_nameGitHub
og:typeobject
og:author:usernamefthain
hostnamegithub.com
expected-hostnamegithub.com
Nonedf99b7164e1d961b639cf5d3cbd6b5ba673edc67bd7e47cdc4746b96099e11ae
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
releasec29ba03b1896083dbe1084f6cd1c5367d8a0d67c
ui-targetfull
theme-color#1e2327
color-schemelight dark

Links:

Skip to contenthttps://github.com/python/cpython/pull/127546/checks#start-of-content
https://github.com/
Sign in https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fpython%2Fcpython%2Fpull%2F127546%2Fchecks
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%2F127546%2Fchecks
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%2Fpull_requests%2Fshow%2Fchecks&source=header-repo&source_repo=python%2Fcpython
Reloadhttps://github.com/python/cpython/pull/127546/checks
Reloadhttps://github.com/python/cpython/pull/127546/checks
Reloadhttps://github.com/python/cpython/pull/127546/checks
Please reload this pagehttps://github.com/python/cpython/pull/127546/checks
python https://github.com/python
cpythonhttps://github.com/python/cpython
Please reload this pagehttps://github.com/python/cpython/pull/127546/checks
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
fthainhttps://github.com/fthain
python:mainhttps://github.com/python/cpython/tree/main
fthain:gc_crashhttps://github.com/fthain/cpython/tree/gc_crash
Conversationhttps://github.com/python/cpython/pull/127546
Commits1 (1)https://github.com/python/cpython/pull/127546/commits
Checkshttps://github.com/python/cpython/pull/127546/checks
Files changedhttps://github.com/python/cpython/pull/127546/files
gh-127545: Specify minimum PyGC_Head alignment to fix build failurehttps://github.com/python/cpython/pull/127546/checks#top
fthainhttps://github.com/fthain
python:mainhttps://github.com/python/cpython/tree/main
fthain:gc_crashhttps://github.com/fthain/cpython/tree/gc_crash
Please reload this pagehttps://github.com/python/cpython/pull/127546/checks
Sign in for the full log viewhttps://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fpython%2Fcpython%2Fpull%2F127546%2Fchecks
Lint on: pull_request https://github.com/python/cpython/actions/runs/15381231522
lint https://github.com/python/cpython/actions/runs/15381231522/job/43272323859?pr=127546
Tests on: pull_request https://github.com/python/cpython/actions/runs/15381231526
Change detection / Create context from changed files https://github.com/python/cpython/actions/runs/15381231526/job/43272324080?pr=127546
Docs / Docs https://github.com/python/cpython/actions/runs/15381231526/job/43272336620?pr=127546
Docs / Doctest https://github.com/python/cpython/actions/runs/15381231526/job/43272336806?pr=127546
Check if Autoconf files are up to date https://github.com/python/cpython/actions/runs/15381231526/job/43272331963?pr=127546
Check if generated files are up to date https://github.com/python/cpython/actions/runs/15381231526/job/43272332158?pr=127546
Windows / Build and test (x64) https://github.com/python/cpython/actions/runs/15381231526/job/43272335844?pr=127546
Windows (free-threading) / Build and test (x64) https://github.com/python/cpython/actions/runs/15381231526/job/43272336030?pr=127546
Windows / Build and test (Win32) https://github.com/python/cpython/actions/runs/15381231526/job/43272335670?pr=127546
Windows / Build and test (arm64) https://github.com/python/cpython/actions/runs/15381231526/job/43272335157?pr=127546
Windows (free-threading) / Build and test (arm64) https://github.com/python/cpython/actions/runs/15381231526/job/43272335488?pr=127546
Windows MSI${{ '' }} https://github.com/python/cpython/actions/runs/15381231526/job/43272332812?pr=127546
macOS / build and test (ghcr.io/cirruslabs/macos-runner:sonoma) https://github.com/python/cpython/actions/runs/15381231526/job/43272333987?pr=127546
macOS (free-threading) / build and test (ghcr.io/cirruslabs/macos-runner:sonoma) https://github.com/python/cpython/actions/runs/15381231526/job/43272333830?pr=127546
macOS / build and test (macos-13) https://github.com/python/cpython/actions/runs/15381231526/job/43272334158?pr=127546
Ubuntu / build and test (ubuntu-24.04) https://github.com/python/cpython/actions/runs/15381231526/job/43272334559?pr=127546
Ubuntu / build and test (ubuntu-24.04-arm) https://github.com/python/cpython/actions/runs/15381231526/job/43272334378?pr=127546
Ubuntu (free-threading) / build and test (ubuntu-24.04) https://github.com/python/cpython/actions/runs/15381231526/job/43272334742?pr=127546
Ubuntu (free-threading) / build and test (ubuntu-24.04-arm) https://github.com/python/cpython/actions/runs/15381231526/job/43272334943?pr=127546
Ubuntu (bolt) / build and test (ubuntu-24.04) https://github.com/python/cpython/actions/runs/15381231526/job/43272335335?pr=127546
Ubuntu SSL tests with OpenSSL (ubuntu-24.04, 3.0.16) https://github.com/python/cpython/actions/runs/15381231526/job/43272331042?pr=127546
Ubuntu SSL tests with OpenSSL (ubuntu-24.04, 3.1.8) https://github.com/python/cpython/actions/runs/15381231526/job/43272331429?pr=127546
Ubuntu SSL tests with OpenSSL (ubuntu-24.04, 3.2.4) https://github.com/python/cpython/actions/runs/15381231526/job/43272331725?pr=127546
Ubuntu SSL tests with OpenSSL (ubuntu-24.04, 3.3.3) https://github.com/python/cpython/actions/runs/15381231526/job/43272332317?pr=127546
Ubuntu SSL tests with OpenSSL (ubuntu-24.04, 3.4.1) https://github.com/python/cpython/actions/runs/15381231526/job/43272332644?pr=127546
WASI / build and test https://github.com/python/cpython/actions/runs/15381231526/job/43272333681?pr=127546
Hypothesis tests on Ubuntu https://github.com/python/cpython/actions/runs/15381231526/job/43272333302?pr=127546
Address sanitizer (ubuntu-24.04) https://github.com/python/cpython/actions/runs/15381231526/job/43272332486?pr=127546
Thread sanitizer / Thread sanitizer https://github.com/python/cpython/actions/runs/15381231526/job/43272336242?pr=127546
Thread sanitizer (free-threading) / Thread sanitizer https://github.com/python/cpython/actions/runs/15381231526/job/43272336417?pr=127546
Cross build Linux https://github.com/python/cpython/actions/runs/15381231526/job/43272333002?pr=127546
CIFuzz https://github.com/python/cpython/actions/runs/15381231526/job/43272333525?pr=127546
All required checks pass https://github.com/python/cpython/actions/runs/15381231526/job/43273018493?pr=127546
Check labels on: pull_request https://github.com/python/cpython/actions/runs/15381231527
DO-NOT-MERGE https://github.com/python/cpython/actions/runs/15381231527/job/43272323783?pr=127546
Unresolved review https://github.com/python/cpython/actions/runs/15381231527/job/43272323959?pr=127546
Check labels on: pull_request https://github.com/python/cpython/actions/runs/15389319872
DO-NOT-MERGE https://github.com/python/cpython/actions/runs/15389319872/job/43294941792?pr=127546
Unresolved review https://github.com/python/cpython/actions/runs/15389319872/job/43294942261?pr=127546
Lint on: pull_request https://github.com/python/cpython/actions/runs/15389319875
lint https://github.com/python/cpython/actions/runs/15389319875/job/43294942113?pr=127546
Tests on: pull_request https://github.com/python/cpython/actions/runs/15389319918
Change detection / Create context from changed files https://github.com/python/cpython/actions/runs/15389319918/job/43294942416?pr=127546
Docs / Docs https://github.com/python/cpython/actions/runs/15389319918/job/43294978089?pr=127546
Docs / Doctest https://github.com/python/cpython/actions/runs/15389319918/job/43294978679?pr=127546
Check if Autoconf files are up to date https://github.com/python/cpython/actions/runs/15389319918/job/43294967568?pr=127546
Check if generated files are up to date https://github.com/python/cpython/actions/runs/15389319918/job/43294964323?pr=127546
Windows / Build and test (x64) https://github.com/python/cpython/actions/runs/15389319918/job/43294977178?pr=127546
Windows (free-threading) / Build and test (x64) https://github.com/python/cpython/actions/runs/15389319918/job/43294977526?pr=127546
Windows / Build and test (Win32) https://github.com/python/cpython/actions/runs/15389319918/job/43294976797?pr=127546
Windows / Build and test (arm64) https://github.com/python/cpython/actions/runs/15389319918/job/43294975832?pr=127546
Windows (free-threading) / Build and test (arm64) https://github.com/python/cpython/actions/runs/15389319918/job/43294976329?pr=127546
Windows MSI${{ '' }} https://github.com/python/cpython/actions/runs/15389319918/job/43294965714?pr=127546
macOS / build and test (ghcr.io/cirruslabs/macos-runner:sonoma) https://github.com/python/cpython/actions/runs/15389319918/job/43294971992?pr=127546
macOS (free-threading) / build and test (ghcr.io/cirruslabs/macos-runner:sonoma) https://github.com/python/cpython/actions/runs/15389319918/job/43294971378?pr=127546
macOS / build and test (macos-13) https://github.com/python/cpython/actions/runs/15389319918/job/43294972490?pr=127546
Ubuntu / build and test (ubuntu-24.04) https://github.com/python/cpython/actions/runs/15389319918/job/43294973364?pr=127546
Ubuntu / build and test (ubuntu-24.04-arm) https://github.com/python/cpython/actions/runs/15389319918/job/43294972933?pr=127546
Ubuntu (free-threading) / build and test (ubuntu-24.04) https://github.com/python/cpython/actions/runs/15389319918/job/43294974577?pr=127546
Ubuntu (free-threading) / build and test (ubuntu-24.04-arm) https://github.com/python/cpython/actions/runs/15389319918/job/43294975038?pr=127546
Ubuntu (bolt) / build and test (ubuntu-24.04) https://github.com/python/cpython/actions/runs/15389319918/job/43294975361?pr=127546
Ubuntu SSL tests with OpenSSL (ubuntu-24.04, 3.0.16) https://github.com/python/cpython/actions/runs/15389319918/job/43294965034?pr=127546
Ubuntu SSL tests with OpenSSL (ubuntu-24.04, 3.1.8) https://github.com/python/cpython/actions/runs/15389319918/job/43294966573?pr=127546
Ubuntu SSL tests with OpenSSL (ubuntu-24.04, 3.2.4) https://github.com/python/cpython/actions/runs/15389319918/job/43294967066?pr=127546
Ubuntu SSL tests with OpenSSL (ubuntu-24.04, 3.3.3) https://github.com/python/cpython/actions/runs/15389319918/job/43294968143?pr=127546
Ubuntu SSL tests with OpenSSL (ubuntu-24.04, 3.4.1) https://github.com/python/cpython/actions/runs/15389319918/job/43294968834?pr=127546
WASI / build and test https://github.com/python/cpython/actions/runs/15389319918/job/43294970882?pr=127546
Hypothesis tests on Ubuntu https://github.com/python/cpython/actions/runs/15389319918/job/43294969947?pr=127546
Address sanitizer (ubuntu-24.04) https://github.com/python/cpython/actions/runs/15389319918/job/43294968430?pr=127546
Thread sanitizer / Thread sanitizer https://github.com/python/cpython/actions/runs/15389319918/job/43294973819?pr=127546
Thread sanitizer (free-threading) / Thread sanitizer https://github.com/python/cpython/actions/runs/15389319918/job/43294974235?pr=127546
Cross build Linux https://github.com/python/cpython/actions/runs/15389319918/job/43294969487?pr=127546
CIFuzz https://github.com/python/cpython/actions/runs/15389319918/job/43294970413?pr=127546
All required checks pass https://github.com/python/cpython/actions/runs/15389319918/job/43296525473?pr=127546
Check labels on: pull_request https://github.com/python/cpython/actions/runs/15389320380
DO-NOT-MERGE https://github.com/python/cpython/actions/runs/15389320380/job/43294943331?pr=127546
Unresolved review https://github.com/python/cpython/actions/runs/15389320380/job/43294942968?pr=127546
Check labels on: pull_request https://github.com/python/cpython/actions/runs/15389390505
DO-NOT-MERGE https://github.com/python/cpython/actions/runs/15389390505/job/43295180082?pr=127546
Unresolved review https://github.com/python/cpython/actions/runs/15389390505/job/43295179566?pr=127546
Check labels on: pull_request https://github.com/python/cpython/actions/runs/15389390515
DO-NOT-MERGE https://github.com/python/cpython/actions/runs/15389390515/job/43295179674?pr=127546
Unresolved review https://github.com/python/cpython/actions/runs/15389390515/job/43295180113?pr=127546
Check labels on: pull_request https://github.com/python/cpython/actions/runs/15389390524
DO-NOT-MERGE https://github.com/python/cpython/actions/runs/15389390524/job/43295179642?pr=127546
Unresolved review https://github.com/python/cpython/actions/runs/15389390524/job/43295180159?pr=127546
Check labels on: pull_request https://github.com/python/cpython/actions/runs/15389414661
DO-NOT-MERGE https://github.com/python/cpython/actions/runs/15389414661/job/43295261012?pr=127546
Unresolved review https://github.com/python/cpython/actions/runs/15389414661/job/43295261567?pr=127546
Check labels on: pull_request https://github.com/python/cpython/actions/runs/15389415723
DO-NOT-MERGE https://github.com/python/cpython/actions/runs/15389415723/job/43295264152?pr=127546
Unresolved review https://github.com/python/cpython/actions/runs/15389415723/job/43295263466?pr=127546
Check labels on: pull_request https://github.com/python/cpython/actions/runs/15421184335
DO-NOT-MERGE https://github.com/python/cpython/actions/runs/15421184335/job/43396429378?pr=127546
Unresolved review https://github.com/python/cpython/actions/runs/15421184335/job/43396430098?pr=127546
Check labels on: pull_request https://github.com/python/cpython/actions/runs/15421184508
DO-NOT-MERGE https://github.com/python/cpython/actions/runs/15421184508/job/43396430065?pr=127546
Unresolved review https://github.com/python/cpython/actions/runs/15421184508/job/43396430607?pr=127546
Check labels on: pull_request https://github.com/python/cpython/actions/runs/15421350989
DO-NOT-MERGE https://github.com/python/cpython/actions/runs/15421350989/job/43397001448?pr=127546
Unresolved review https://github.com/python/cpython/actions/runs/15421350989/job/43397002106?pr=127546
Check labels on: pull_request https://github.com/python/cpython/actions/runs/15421351461
DO-NOT-MERGE https://github.com/python/cpython/actions/runs/15421351461/job/43397002912?pr=127546
Unresolved review https://github.com/python/cpython/actions/runs/15421351461/job/43397003563?pr=127546
Check labels on: pull_request https://github.com/python/cpython/actions/runs/15444424516
DO-NOT-MERGE https://github.com/python/cpython/actions/runs/15444424516/job/43470075838?pr=127546
Unresolved review https://github.com/python/cpython/actions/runs/15444424516/job/43470075135?pr=127546
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.