[mono][minijit] Runtime_133101 crashes on Windows x64

[lewing]

Description

Runtime_133101.Runtime_133101.TestEntryPoint consistently crashes the Regression_ro_2 merged test process when run by Windows x64 Mono MiniJIT. The failure occurs across unrelated pull-request builds and different Helix machines.

Reproduction Steps

Run JIT/Regression/Regression_ro_2 in the windows-x64 Release AllSubsets_Mono_Minijit_RuntimeTests minijit leg.

The final test output is:

Running test: global::Runtime_133101.Runtime_133101.TestEntryPoint()
Exit Code: -1073741819
Expected: 100
Actual: -1073741819
END EXECUTION - FAILED
FAILED

Example build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1586954

Example console log: https://helixr18s23ayyejvk1x8qcc.blob.core.windows.net/dotnet-runtime-refs-pull-133367-merge-d06948e5e63e4cfe8e/Regression_ro_2/1/console.ce0c2d1f.log?helixlogtype=result

Expected behavior

The test passes and the merged test process exits with code 100.

Actual behavior

corerun terminates with Windows access violation 0xC0000005 (-1073741819) immediately after starting Runtime_133101.Runtime_133101.TestEntryPoint.

Regression?

The test was recently added to Regression_ro_2; the same crash has since appeared in numerous unrelated runtime PR builds.

Known Workarounds

Exclude Runtime_133101 from the merged test project for Windows x64 Mono MiniJIT while keeping it enabled for other configurations.

Configuration

• Runtime: Mono MiniJIT
• OS: Windows 11
• Architecture: x64
• Test work item: Regression_ro_2

Other information

The failure does not produce a TRX result for the crashing test, so Build Analysis cannot validate a sufficiently specific Known Build Error signature. The issue is therefore used as an ActiveIssue tracker for a configuration-specific test exclusion.

Note

This issue was generated with GitHub Copilot.

Known Issue 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": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

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Summary

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

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