[cbartz]

Fixes #237

Summary

• Release 2.338 failed because the arm patch conflicts with v2.338.0: upstream bumped the .NET 8 SDK pin in src/dev.sh and src/global.json (8.0.424 → 8.0.425), while the arm patch pins .NET 9 (9.0.318). I regenerated all three runner-sdk8-*.patch files for v2.338.0. For arm, the conflict resolution keeps the .NET 9 pin. ppc64le and s390x rebased without conflicts.
• Release workflow: patch_update_release.yml now accepts a patch whose last line already says # From upstream release: <LATEST_TAG>. It checks that the patch applies cleanly and uses it as-is instead of rebasing. Merging manually regenerated patches then bumps last_processed_tag.txt and creates releases/<tag> as usual. Before this change, the run either failed again or skipped creating the release.
• No failure issue was opened because the ci-failure label had been deleted, so gh issue create failed with could not add label: 'ci-failure' not found. The workflow now recreates the label before opening the issue.

Testing

• All regenerated patches pass git apply --check against v2.338.0.
• I ran the edited "Process architectures" step locally against upstream in three setups. With the regenerated patches all arches succeed. With main's current patches it still fails on arm, as before. With only arm regenerated, all succeed.
• Not tested: an actual arm build of 2.338.0 (CI will be the first). The label fix can't be checked until a monitored workflow fails.

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[Copilot]

🔵 Needs a closer look

The release-critical ARM patch changes its SDK baseline and has not yet passed an actual ARM build.

0 open findings

What changed in this PR

Restores the v2.338.0 release flow after ARM patch conflicts and missing failure notifications.

Changes:

• Regenerates architecture patches against v2.338.0.
• Reuses validated, manually regenerated patches.
• Recreates the ci-failure label before opening failure issues.

File	Description
patches/​runner-sdk8-arm.patch	Rebases ARM changes while retaining .NET 9.
patches/​runner-sdk8-ppc64le.patch	Rebases ppc64le changes onto v2.338.0.
patches/​runner-sdk8-s390x.patch	Rebases s390x changes onto v2.338.0.
.github/​workflows/​patch_update_release.yml	Accepts validated pre-regenerated patches.
.github/​workflows/​create-issue-on-failure.yaml	Ensures the failure label exists.

🧠 Review effort: Balanced

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[cbartz]

Re: review: verified locally: upstream v2.338.0 + patches/runner-sdk8-arm.patch → ./dev.sh layout Release linux-arm builds cleanly (exit 0, no errors or warnings). The layout targets .NETCoreApp,Version=v9.0/linux-arm with an armhf Runner.Listener. Note that the PR's build (linux-arm) check exercises runner-main-sdk8-arm.patch, not this release patch, so this was the missing coverage. Runtime behaviour on armhf hardware is still only covered by the release run.

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