Windows Self-Hosted Runner marks successful pipeline as failed with exit code 0

[vinothkumar_sivaram]

Hi Atlassian team,

I am having an issue with a Bitbucket Cloud Windows self-hosted runner.

Environment:
- Bitbucket Cloud Free
- Windows self-hosted runner
- Runner version: 6.0.7
- Runtime: windows-powershell
- OpenJDK: 25.0.4
- Runner labels: self.hosted, windows

The runner starts successfully and remains ONLINE.

The problem occurs even with a minimal pipeline containing only:

pipelines:
branches:
main:
- step:
name: Test Windows Runner
runs-on:
- self.hosted
- windows
script:
- 'Write-Host "WINDOWS RUNNER TEST"'
- 'dotnet --version'
- 'wix --version'
- 'Write-Host "RUNNER TEST SUCCESS"'
- 'exit 0'

All commands execute successfully.

The runner log shows:

Executing build script in native script

Script exited with exit code: 0

However, immediately afterward the runner reports:

Not uploading caches. (numberOfCaches: 0, resultOrError: ERROR)

The test report parsing also completes successfully:

Successfully parsed JUnit report with tests=0, failures=0, errors=0, skipped=0

Then the runner finishes with:

Completing step with result Result{status=ERROR, error=Some(Error{key='runner.bitbucket-pipelines.build-failure' ...})}

The runner remains ONLINE after the failure.

There are:
- No artifacts configured
- No cache configured
- No application build involved
- No MSI/WiX build involved

The issue therefore reproduces with a completely minimal pipeline.

Could you please help identify why the Windows self-hosted runner is marking the step as ERROR even though the script exits with code 0?

I can provide the complete runner log and pipeline run details if required.