CI build failure: error CS8032: An instance of analyzer Microsoft.NetCore.CSharp.Analyzers.... cannot be created

[jkotas]

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1449290&view=logs&j=2710d842-fa61-5104-0e86-cc29dd313ead
Build error leg or test failing: Build / osx-arm64 release Installer_Build_And_Test / Build product
Pull request: #128975

Error Message

DO NOT USE JSON BELOW IF THIS IS A BUILD BREAK otherwise build analysis will allow pull requests to merge that break the build worse. For a build break, do not use this issue form. Make a regular new issue.

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

{
  "ErrorMessage": "",
  "ErrorPattern": "error CS8032: An instance of analyzer .* cannot be created",
  "BuildRetry": true,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1449290
Error message validated: [error CS8032: An instance of analyzer .* cannot be created]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 6/5/2026 4:46:08 AM UTC

Report

Build	Repository	Step Name	Console log	Pull Request
1450972	dotnet/runtime	Build product	Log	#128975
1450782	dotnet/runtime	Build product	Log	#129007
1450632	dotnet/runtime	Build product	Log	#128973
1450472	dotnet/runtime	Build product	Log	#129021
1450373	dotnet/runtime	Build product	Log	#128971
1449290	dotnet/runtime	Build product	Log	#128975

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
5	6	6

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[MihuBot]

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

• Build failure: osx-arm64 release Installer_Build_And_Test #128372
• error CS8032: An instance of analyzer Microsoft.NetCore.CSharp.Analyzers.Usage.CSharpMissingShebangInFileBasedProgram cannot be created #128905

[jkotas]

#128372 (comment)

Keep this open until the fix flows through to allow build analysis to categorize it automatically.