[Known Build Error] RefDirective_Duplicate test asserts Fail()

[kotlarmilos]

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1400964
Build error leg or test failing: Microsoft.NET.Build.Tests.dll.4.WorkItemExecution
Pull request: #54135

Known Issue Error Message

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

{
  "ErrorMessage": "RefDirective_Duplicate(subdir:",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Details

Microsoft.DotNet.Cli.Run.Tests.RunFileTests_Directives.RefDirective_Duplicate (both subdir: null and subdir: "app" theory cases) fails consistently on Linux, Windows, and macOS arm64. It crashes the parent helix work items (dotnet.Tests.dll.11, .13, .22) with BadExit.

Report

Build	Definition	Test	Pull Request
1400964	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.RunFileTests_Directives.RefDirective_Duplicate	#54135

Summary

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

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1400964
Error message validated: [RefDirective_Duplicate(subdir:]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 4/29/2026 10:09:20 AM UTC

Report

Build	Definition	Test	Pull Request
1401652	dotnet/sdk	dotnet.Tests.dll.22.WorkItemExecution	#54143
1400964	dotnet/sdk	Microsoft.DotNet.Cli.Run.Tests.RunFileTests_Directives.RefDirective_Duplicate	#54135

Summary

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

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1400964
Error message validated: [RefDirective_Duplicate(subdir:]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 4/29/2026 10:09:20 AM UTC

[jjonescz]

I see, it was parallel merging of #54088 and #54087 that caused this.