System.IO.Tests.Directory_Delete_MountVolume.RunTest failure

[jkotas]

[FAIL] System.IO.Tests.Directory_Delete_MountVolume.RunTest
Assert.True() Failure
Expected: True
Actual:   False
   at System.IO.Tests.Directory_Delete_MountVolume.RunTest() in /_/src/libraries/System.Runtime/tests/System.IO.FileSystem.Tests/Directory/Delete_MountVolume.cs:line 378

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1325097
Build error leg or test failing: System.IO.Tests.Directory_Delete_MountVolume.RunTest
Pull request: #125286

Error Message

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

{
  "ErrorMessage": ["[FAIL] System.IO.Tests.Directory_Delete_MountVolume.RunTest","Actual:   False"],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1325097
Error message validated: [[FAIL] System.IO.Tests.Directory_Delete_MountVolume.RunTest Actual: False]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 3/7/2026 9:05:22 PM UTC

Report

Build	Definition	Test	Pull Request
1374879	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#126752
1374532	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest
1372366	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#125559
1371466	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#126493
1370932	dotnet/runtime	System.IO.Tests.Directory_ReparsePoints_MountVolume.runTest	#126660
1370025	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#126629
1368819	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#126158
1365059	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#126385
1363650	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest
1362551	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#126420
1362123	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#126091
1360393	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#126313
1359628	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#126078
1354084	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#126092
1353147	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#124698
1352515	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#126071
1348951	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#125848
1345917	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#125848
1345369	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#125848
1344970	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#122950
1343493	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#125629
1342010	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#125592
1341425	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#124645
1339816	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#125196
1339799	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#125673
1338262	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#125525
1337902	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#125631
1337261	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#125570
1336131	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest
1335250	dotnet/runtime	System.IO.Tests.Directory_Delete_MountVolume.RunTest	#125548

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
2	7	30

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/area-system-io
See info in area-owners.md if you want to be subscribed.

[jkotas]

@ViveliDuCh @jozkee Related / introduced by #125092

[jkotas]

This is still failing (from #124959):

https://helixr1107v0xdcypoyl9e7f.blob.core.windows.net/dotnet-runtime-refs-pull-124959-merge-602783fa462a4ff098/System.IO.FileSystem.Tests/1/console.fdae4eac.log?skoid=8eda00af-b5ec-4be9-b69b-0919a2338892&sktid=72f988bf-86f1-41af-91ab-2d7cd011db47&skt=2026-03-12T14%3A40%3A19Z&ske=2026-03-12T15%3A40%3A19Z&sks=b&skv=2026-02-06&sv=2026-02-06&st=2026-03-12T14%3A40%3A19Z&se=2026-03-12T15%3A40%3A19Z&sr=c&sp=r&sig=0tHyswQoudfIUpJNgdSiRrv2WCR2F0calmII3MwxDYQ%3D

[VincentBu]

Failed in: runtime-coreclr libraries-jitstress 20260315.1

Failed tests:

net11.0-windows-Release-arm64-jitstress2_tiered-Windows.11.Arm64.Open
- System.IO.Tests.Directory_Delete_MountVolume.RunTest

Error message:

Assert.True() Failure
Expected: True
Actual:   False

Stack trace:

   at System.IO.Tests.Directory_Delete_MountVolume.RunTest() in /_/src/libraries/System.Runtime/tests/System.IO.FileSystem.Tests/Directory/Delete_MountVolume.cs:line 388
   at System.IO.Tests.Directory_Delete_MountVolume.RunTest() in /_/src/libraries/System.Runtime/tests/System.IO.FileSystem.Tests/Directory/Delete_MountVolume.cs:line 44
   at System.RuntimeMethodHandle.InvokeMethod(ObjectHandleOnStack target, Void** arguments, ObjectHandleOnStack sig, BOOL isConstructor, ObjectHandleOnStack result)
   at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args) in /_/src/coreclr/System.Private.CoreLib/src/System/Reflection/MethodBaseInvoker.CoreCLR.cs:line 36
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) in /_/src/libraries/System.Private.CoreLib/src/System/Reflection/RuntimeMethodInfo.cs:line 134