CI failure on 8.0: MSBuild error in <XHarnessAppBundleToTest> because of a missing directory

[svick]

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1511237&view=logs&j=1a7f2d0f-403f-5f1a-afbb-20466d7ac54e
Build error leg or test failing: Build / ios-arm64 Release AllSubsets_NativeAOT / Send to Helix
Pull request: N/A

Error Message

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Fill the error message using step by step known issues guidance.

{
  "ErrorPattern": "sendtohelix-mobile\\.targets\\(\\d+,\\d+\\): error MSB4184: The expression \"\\[System\\.IO\\.Directory\\]::GetDirectories\\(.*?artifacts/helix/tests/?, \\*\\.app, System\\.IO\\.SearchOption\\.AllDirectories\\)\" cannot be evaluated\\. Could not find a part of the path '.*?artifacts/helix/tests'",
  "BuildRetry": false,
  "ExcludeConsoleLog": true
}

/Users/runner/work/1/s/src/libraries/sendtohelix-mobile.targets(87,9): error MSB4184: The expression "[System.IO.Directory]::GetDirectories(/Users/runner/work/1/s/artifacts/helix/tests/, *.app, System.IO.SearchOption.AllDirectories)" cannot be evaluated. Could not find a part of the path '/Users/runner/work/1/s/artifacts/helix/tests'. [/Users/runner/work/1/s/src/libraries/sendtohelixhelp.proj]

The line at issue in src/libraries/sendtohelix-mobile.targets seems to be:

      <XHarnessAppBundleToTest Condition="Exists('$(TestArchiveTestsRoot)')"
        Include="$([System.IO.Directory]::GetDirectories('$(TestArchiveTestsRoot)', '*.app', System.IO.SearchOption.AllDirectories))">

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1511237
Error message validated: [sendtohelix-mobile\.targets\(\d+,\d+\): error MSB4184: The expression "\[System\.IO\.Directory\]::GetDirectories\(.*?artifacts/helix/tests/?, \*\.app, System\.IO\.SearchOption\.AllDirectories\)" cannot be evaluated\. Could not find a part of the path '.*?artifacts/helix/tests']
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 7/16/2026 9:54:50 AM UTC

Report

Build	Repository	Step Name	Console log	Pull Request
1513554	dotnet/runtime	Send to Helix	Log	#130724
1513383	dotnet/runtime	Send to Helix	Log	#130915
1512245	dotnet/runtime	Send to Helix	Log
1512242	dotnet/runtime	Send to Helix	Log
1511237	dotnet/runtime	Send to Helix	Log

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
4	5	5

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