[ci-scan] Known Build Error: Crossgen2 crashes with exitcode 139 (SIGSEGV) amd `The file is not a ReadyToRun image` error on osx-arm64 in r2r-extra

[github-actions]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1406815
Build error leg or test failing: coreclr Pri1 Runtime Tests Run R2R osx arm64 checked-Directed_3

Error Message

{
  "ErrorMessage": ["The file is not a ReadyToRun image","Crossgen2 failed with exitcode: 139"],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Crossgen2 crashes with SIGSEGV (exitcode 139) when compiling test assemblies for ReadyToRun on osx-arm64. Tests subsequently fail with BadImageFormatException: The file is not a ReadyToRun image or Fatal error. Invalid Program: attempted to call a UnmanagedCallersOnly method from managed code. Recurring in all 3 scanned builds of pipeline runtime-coreclr r2r-extra (def 114): builds 1406815, 1406374, 1397395.

Affected pipelines:

• runtime-coreclr r2r-extra (def 114): osx-arm64 checked — Directed_3 workitem — exit 1 — Helix job 5e636b9b-20d0-4ff9-9542-cf529f59d983

Error excerpt:

Fatal error. Invalid Program: attempted to call a UnmanagedCallersOnly method from managed code.
Error: System.BadImageFormatException: The file is not a ReadyToRun image
Crossgen2 failed with exitcode: 139

Console log: https://helixr1107v0xdeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-heads-main-5e636b9b20d04ff995/Directed_3/1/console.65f25b36.log?helixlogtype=result

First seen in scanned window: build 1397395 (April 27, 2026). All 3 scanned builds are affected. This is computed within the scanned window and may not be the true origin.

Note

🔒 Integrity filter blocked 6 items

The following items were blocked because they don't meet the GitHub integrity level.

• #92420 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #123982 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #111752 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #125600 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #124206 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #126448 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".

To allow these resources, lower min-integrity in your GitHub frontmatter:

tools:
  github:
    min-integrity: approved  # merged | approved | unapproved | none

Generated by CI Outer-Loop Failure Scanner · ● 16.2M · ◷

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1406815
Error message validated: [Crossgen2 failed with exitcode: 139]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 5/6/2026 11:37:05 AM UTC

Report

Build	Definition	Test	Pull Request
1406815	dotnet/runtime	Directed_3.WorkItemExecution

Summary

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

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
}

Report

Build	Definition	Test	Pull Request
1406815	dotnet/runtime	Directed_3.WorkItemExecution

Summary

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

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
}

[dotnet-policy-service]

Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
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[jkotas]

Crossgen2 failed with exitcode: 139"

@kotlarmilos This is too broad pattern. It will match any crossgen2 crash. I have updated it to be more specific.