Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1362636
Build error leg or test failing: System.ComponentModel.Primitives.Tests.WorkItemExecution, System.Composition.Hosting.Tests.WorkItemExecution, System.Linq.Tests.WorkItemExecution, System.Memory.Tests.WorkItemExecution, System.Net.NameResolution.Functional.Tests.WorkItemExecution, System.Numerics.Tensors.Tests.WorkItemExecution, System.Runtime.InteropServices.RuntimeInformation.Tests.WorkItemExecution, System.Runtime.Serialization.Schema.Tests.WorkItemExecution
Pull request: #125441

Affected CI jobs: build_tvos_arm64_Debug_AllSubsets_CoreCLR_Smoke

Error Message

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

{
  "ErrorMessage": ["crossgen2/crossgen2\" exited with code 133", "ProxyProjectForAOTOnHelix.proj"],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Summary

On tvos-arm64 Debug CoreCLR, crossgen2 crashes with exit code 133 (SIGBUS) during R2R compilation of test app assemblies on Helix. This causes the .app bundle to be malformed (missing .r2r.o object files), and clang fails to link it.

Error from Helix console log:

error MSB6006: "/tmp/helix/working/.../build/crossgen2/crossgen2" exited with code 133. [.../publish/ProxyProjectForAOTOnHelix.proj]
clang : error : no such file or directory: '.../obj/R2R/System.ComponentModel.Primitives.Tests.r2r.o' [.../publish/ProxyProjectForAOTOnHelix.proj]

8 work items affected in Helix job 99bc6f24:

• System.ComponentModel.Primitives.Tests
• System.Composition.Hosting.Tests
• System.Linq.Tests
• System.Memory.Tests
• System.Net.NameResolution.Functional.Tests
• System.Numerics.Tensors.Tests
• System.Runtime.InteropServices.RuntimeInformation.Tests
• System.Runtime.Serialization.Schema.Tests

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1362636
Error message validated: [crossgen2/crossgen2" exited with code 133 ProxyProjectForAOTOnHelix.proj]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 4/2/2026 10:21:25 AM UTC

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Summary