[ci-scan] Build break: Mono MiniFullAot AOT compile fails on JIT/Regression_ro_2 (exit 134)

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Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1610154
Build error leg or test failing: linux-x64 Release AllSubsets_Mono_MiniFullAot_RuntimeTests minifullaot - AOT compile CoreCLR tests

KBE authoring guidance (ci-failure-scan)

• Error Details is for readers. Paste the full exception, stack trace, or build error excerpt so the failure is understandable without opening the raw log.
• Build Analysis parses only the single JSON block under Error Message.
• ErrorMessage is a case-sensitive ordinal String.Contains substring copied verbatim from the failing log.
• Set BuildRetry to true only for a clear infrastructure retry case. ExcludeConsoleLog disables Helix console-log scanning.

Error Details

The runtime-extra-platforms pipeline (def 154) fails in the AllSubsets_Mono_MiniFullAot_RuntimeTests minifullaot leg during the AOT compile CoreCLR tests step. The Mono AOT compiler crashes (a fatal error in the mono runtime or one of the native libraries) while running the compiled test via corerun, causing the aot-compile MSBuild target to fail. Send to Helix is skipped, so no test work items run. This is a build break that fails the entire leg and has reproduced in every sampled build.

aot-compile: compiling .../JIT/Regression_ro_2/Regression_ro_2/Regression_ro_2.dll
a fatal error in the mono runtime or one of the native libraries
/__w/1/s/src/mono/msbuild/aot-compile.proj(19,9): error MSB3073: The command ".../Tests/Core_Root/corerun .../JIT/Regression_ro_2/Regression_ro_2/Regression_ro_2.dll" exited with code 134.
Build FAILED.
    1 Error(s)
Failed to build tests. See the build logs

Error Message

{
  "ErrorMessage": "src/mono/msbuild/aot-compile.proj(19,9): error MSB3073: The command \"/__w/1/s/artifacts/tests/coreclr/linux.x64.Release/Tests/Core_Root/corerun /__w/1/s/artifacts/tests/coreclr/linux.x64.Release/JIT/Regression_ro_2/Regression_ro_2/Regression_ro_2.dll\" exited with code 134.",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Agentic workflow metadata (ci-failure-scan)

Workflow artifact: ci-failure-scan
Artifact kind: kbe-verification
Verified match count: 2 hits in failure.log

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Filed by ci-failure-scan (detection only). ci-failure-fix walks open [ci-scan] KBEs and either opens a small fix PR or comments here to loop in owners — it never disables the test.

Note

This issue was generated by the ci-failure-scan Copilot workflow.

Generated by CI Outer-Loop Failure Scanner · opus48 · 956.6 AIC · ⌖ 13.4 AIC · ⊞ 19.2K · ◷

Report

Build	Repository	Step Name	Console log	Pull Request
1613174	dotnet/runtime	AOT compile CoreCLR tests	Log
1612276	dotnet/runtime	AOT compile CoreCLR tests	Log	#133197

Summary

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