OverlappingExtensions_AllMatchTypes_Comprehensive failing on Assert.DoesNotContain

[elinor-fung]

System.IO.Tests.Enumeration.MatchTypesTests_Directory_GetFiles.OverlappingExtensions_AllMatchTypes_Comprehensive [FAIL]
  Assert.DoesNotContain() Failure: Filter matched in collection
               � (pos 0)
  Collection: ["C:\\h\\w\\B1E60A3B\\t\\#MatchTypesTests_Directory_"���, "C:\\h\\w\\B1E60A3B\\t\\#MatchTypesTests_Directory_"���, "C:\\h\\w\\B1E60A3B\\t\\#MatchTypesTests_Directory_"���, "C:\\h\\w\\B1E60A3B\\t\\#MatchTypesTests_Directory_"���]
  Stack Trace:
    /_/src/libraries/System.Runtime/tests/System.IO.FileSystem.Tests/Enumeration/MatchTypesTests.cs(584,0): at System.IO.Tests.Enumeration.MatchTypesTests.OverlappingExtensions_AllMatchTypes_Comprehensive()
       at System.RuntimeMethodHandle.InvokeMethod(ObjectHandleOnStack target, Void** arguments, ObjectHandleOnStack sig, BOOL isConstructor, ObjectHandleOnStack result)
    /_/src/coreclr/System.Private.CoreLib/src/System/Reflection/MethodBaseInvoker.CoreCLR.cs(36,0): at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
    /_/src/libraries/System.Private.CoreLib/src/System/Reflection/RuntimeMethodInfo.cs(126,0): at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1441860
Build error leg or test failing: System.IO.Tests.Enumeration.MatchTypesTests_Directory_GetFiles.OverlappingExtensions_AllMatchTypes_Comprehensive
Pull request: #128796

Error Message

{
  "ErrorMessage": ["Assert.DoesNotContain() Failure: Filter matched in collection", "OverlappingExtensions_AllMatchTypes_Comprehensive"],
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1441860
Error message validated: [Assert.DoesNotContain() Failure: Filter matched in collection OverlappingExtensions_AllMatchTypes_Comprehensive [FAIL]]
Result validation: ❌ Known issue did not match with the provided build.
Validation performed at: 6/2/2026 5:02:10 PM UTC

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1441860
Error message validated: [Assert.DoesNotContain() Failure: Filter matched in collection OverlappingExtensions_AllMatchTypes_Comprehensive]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 6/2/2026 5:03:23 PM UTC

Report

Build	Repository	Test	Pull Request
1441860	dotnet/runtime	System.IO.Tests.Enumeration.MatchTypesTests_Directory_GetFiles.OverlappingExtensions_AllMatchTypes_Comprehensive	#128796

Summary

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

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

• Test failure: System.IO.Tests.Enumeration.MatchTypesTests_Directory_GetFiles.OverlappingExtensions_AllMatchTypes_Comprehensive #125313
• OverlappingExtensions_AllMatchTypes_Comprehensive failed in CI #124210