Pin Python 3.13.15 for older CLI versions in the multi-language check - #4210
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🟢 Approval recommended
The focused version pin addresses the documented CI failure without changing the existing execution condition.
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What changed in this PRPins Python 3.13.15 in the multi-language PR check to avoid extractor failures with older CodeQL CLI versions.
Changes:
- Pins setup-python to Python 3.13.15.
- Documents the Python 3.13.16 incompatibility.
| File | Description |
|---|---|
| pr-checks/checks/multi-language-autodetect.yml | Updates the workflow template’s Python version and rationale. |
| .github/workflows/__multi-language-autodetect.yml | Generated counterpart; excluded from direct review. |
- .github/workflows/__multi-language-autodetect.yml
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henrymercer
marked this pull request as ready for review
October 7, 2026 18:02
mbg
approved these changes
Oct 7, 2026
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The "Multi-language repository" PR check is failing intermittently on ubuntu-latest for older CLI versions, for example in this run on main, with ImportError: cannot import name '_ERR_MSG' from 'importlib._bootstrap'.
The check installs Python 3.13 for these CLI versions because they don't work with Python 3.14 (#3212). Version 20261005.85 of the ubuntu-24.04 runner image has Python 3.13.16 in its toolcache, and 3.13.16 includes python/cpython@b0a181d8fc, a backport of the change that removed importlib._bootstrap._ERR_MSG in 3.14. Jobs that still run on the previous image get 3.13.15 and pass.
This PR pins the version to 3.13.15, which setup-python downloads on images that don't have it in their toolcache. The step's condition is unchanged, so newer CLI versions such as default also get 3.13.15, even though they don't need it.
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