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[CI Failure] GitHub Actions runner fails to parse actions/checkout's action.yml manifest (corrupted download) #19737
Description
Build Information
Build: https://github.com/microsoft/aspire/actions/runs/33046510101
Build error leg: Tests / Build native CLI archive (macOS x64) / Build CLI (osx-x64)
Pull request: #19709
Error Message
##[error]actions/checkout/de0fac2e4500dabe0009e67214ff5f5447ce83dd/action.yml: (Line: 1, Col: 1, Idx: 0) - (Line: 1, Col: 2, Idx: 1): While scanning for the next token, find character that cannot start any token.
##[error]System.ArgumentException: Unexpected type '' encountered while reading 'action manifest root'. The type 'MappingToken' was expected.
Failed to load actions/checkout/de0fac2e4500dabe0009e67214ff5f5447ce83dd/action.yml
Description
GitHub Actions runner fails to parse actions/checkout's action.yml manifest (corrupted download)
Type: infra-failure
Occurrences
| Date | Build | Job | PR |
|---|---|---|---|
| 2026-08-27 | 33046510101 | Tests / Build native CLI archive (macOS x64) / Build CLI (osx-x64) | #19709 |
| 2026-08-31 | 33428326086 | Tests / Templates-XUnit_Default_NewUpAndBuildSupportProjectTemplatesTests / Templates-XUnit_Default_NewUpAndBuildSupportProjectTemplatesTests (macos-latest) | #19719 |
Activity
radical commentedon Aug 29, 2026
[automated] The CI shepherd is watching this failure.
Current assessment: Watch this subthreshold-infrastructure-recurrence for a third independent failure or positive recovery.
Evidence reviewed:
Evidence still needed:
Reassess when: After a third independent failure or positive recovery.
No quarantine, retry, closure, or investigation has been started.