[Known Build Error] Pool leak detected

[jjonescz]

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1424199
Build error leg or test failing: Microsoft.CodeAnalysis.CSharp.CommandLine.UnitTests.CommandLineTests.TestNoSuppression_CompilerSemanticError
Pull request: #83744

Error Message

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

{
  "ErrorMessage": "Pool leak detected! The following pooled objects were not returned",
  "ErrorPattern": "",
  "BuildRetry": true,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1424199
Error message validated: [Pool leak detected! The following pooled objects were not returned]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 5/18/2026 9:31:16 AM UTC

Report

Build	Definition	Test	Pull Request
2977952	dotnet-roslyn	Microsoft.CodeAnalysis.CSharp.CommandLine.UnitTests.CommandLineTests.TestSuppression_CompilerSyntaxDeclarationError_SuppressWarningTriggeredByGenerator(skipAnalyzers: True)
1424469	dotnet/roslyn	Microsoft.CodeAnalysis.CSharp.CommandLine.UnitTests.CommandLineTests.TestNoSuppression_CompilerSemanticError	#83661
1424470	dotnet/roslyn	Microsoft.CodeAnalysis.CSharp.CommandLine.UnitTests.CommandLineTests.TestNoSuppression_CompilerSemanticError
2977610	dotnet-roslyn	Microsoft.CodeAnalysis.CSharp.CommandLine.UnitTests.CommandLineTests.TestNoSuppression_CompilerSemanticError
1424199	dotnet/roslyn	Microsoft.CodeAnalysis.CSharp.CommandLine.UnitTests.CommandLineTests.TestNoSuppression_CompilerSemanticError	#83744

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
5	5	5