System.IO.Tests.Directory_Delete_MountVolume.RunTest occasionally fails in CI

[jtschuster]

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1341450
Build error leg or test failing: System.IO.Tests.Directory_Delete_MountVolume.RunTest
Pull request: #125421

Error Message

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

{
  "ErrorMessage": "System.IO.Tests.Directory_Delete_MountVolume.RunTest [FAIL]\r\n      Assert.True() Failure\r\n      Expected: True\r\n      Actual:   False\r\n      Stack Trace:\r\n        \/_\/src\/libraries\/System.Runtime\/tests\/System.IO.FileSystem.Tests\/Directory\/Delete_MountVolume.cs",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1341450
Error message validated: [System.IO.Tests.Directory_Delete_MountVolume.RunTest [FAIL] Assert.True() Failure Expected: True Actual: False Stack Trace: /_/src/libraries/System.Runtime/tests/System.IO.FileSystem.Tests/Directory/Delete_MountVolume.cs]
Result validation: ❌ Known issue did not match with the provided build.
Validation performed at: 3/19/2026 4:49:52 PM UTC

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1341450
Error message validated: [System.IO.Tests.Directory_Delete_MountVolume.RunTest [FAIL] Assert.True() Failure Expected: True Actual: False Stack Trace: /_/src/libraries/System.Runtime/tests/System.IO.FileSystem.Tests/Directory/Delete_MountVolume.cs]
Result validation: ❌ Known issue did not match with the provided build.
Validation performed at: 3/19/2026 4:54:43 PM UTC

Report

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	0	0

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[MihuBot]

I'm a bot. Here is a possible related and/or duplicate issue (I may be wrong):

• System.IO.Tests.Directory_Delete_MountVolume.RunTest failure #125295

[jtschuster]

Yep, dupe.