System.Diagnostics.Tests.ProcessWaitingTests.ProcessSafeHandle_WaitForExitOrKillOnTimeout_KillsOnTimeout failure on linux-x64 with checked CoreCLR

[jkoritzinsky]

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1391623
Build error leg or test failing: System.Diagnostics.Tests.ProcessWaitingTests.ProcessSafeHandle_WaitForExitOrKillOnTimeout_KillsOnTimeout
Pull request: #127182

Error Message

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

{
  "ErrorMessage": "at System.Diagnostics.Tests.ProcessWaitingTests.ProcessSafeHandle_WaitForExitOrKillOnTimeout_KillsOnTimeout() in /_/src/libraries/System.Diagnostics.Process/tests/ProcessWaitingTests.cs:line 714",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1391623
Error message validated: [at System.Diagnostics.Tests.ProcessWaitingTests.ProcessSafeHandle_WaitForExitOrKillOnTimeout_KillsOnTimeout() in /_/src/libraries/System.Diagnostics.Process/tests/ProcessWaitingTests.cs:line 714]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 4/23/2026 8:30:12 PM UTC

Report

Build	Definition	Test	Pull Request
1391623	dotnet/runtime	System.Diagnostics.Tests.ProcessWaitingTests.ProcessSafeHandle_WaitForExitOrKillOnTimeout_KillsOnTimeout	#127182

Summary

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

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[vcsjones]

This is basically a duplicate of #127287, but the issue was closed by the PR and there are still a good number of PRs running that haven't picked up the fix.

I think we can just leave this open for a day or so until all of the pipelines have settled with the fix.

[adamsitnik]