[ci-scan] Test failure: SystemCoreLibDirectory crashes in R2R_Composite (crossgen2 outerloop)

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Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1449150
Build error leg or test failing: coreclr Pri1 Runtime Tests Run R2R_Composite windows x64 checked - Loader/SystemCoreLibDirectory

Error Details

"Running CrossGen2: crossgen2.exe `@composite-r2r`.dll.rsp --composite"
Emitting R2R PE file: composite-r2r.dll
Emitting R2R PE file: SystemCoreLibDirectory.dll
Emitting R2R PE file: TestLibrary.dll
"Running R2RDump: dotnet r2rdump.dll --header --sc --in composite-r2r.dll"
corerun.exe -p "SYSTEM_CORELIB_DIRECTORY=...\Subdirectory" SystemCoreLibDirectory.dll
Expected: 100
Actual: -1073740286
END EXECUTION - FAILED

Error Message

{
  "ErrorMessage": "Loader/SystemCoreLibDirectory/SystemCoreLibDirectory/SystemCoreLibDirectory.cmd has failed",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Additional context

• Pipeline: runtime-coreclr crossgen2 outerloop (definition 134)
• Mode: R2R_Composite
• Platform: windows-x64, checked (also failing on linux-x64, osx-arm64, osx-x64, linux-arm64)
• Queue: windows.10.amd64.open.rt
• Test: Loader/SystemCoreLibDirectory/SystemCoreLibDirectory/SystemCoreLibDirectory.cmd
• Exit code: -1073740286 (STATUS_FATAL_USER_CALLBACK_EXCEPTION)
• Regression source: Likely introduced by PR Add SYSTEM_CORELIB_DIRECTORY host property for explicit CoreLib location #128734 (merged 2026-06-03) which added the SYSTEM_CORELIB_DIRECTORY host property. The test passes in non-composite R2R mode but crashes in composite R2R mode.
• Helix log: https://helixr1107v0xdcypoyl9e7f.blob.core.windows.net/dotnet-runtime-refs-heads-main-90ff1e8b7dbf496bb4/Loader/1/console.de370ca5.log?helixlogtype=result

First build it occurred

• Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1447200
• Finished: 2026-06-03
• Occurrences in window: 3+ (every build since Jun 3)
• Confirmed in follow-up: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1450849 (Jun 5)

---

Filed by ci-failure-scan, which scans dnceng-public outer-loop pipelines on main and converts stable failures into KBEs and test-disable PRs.

Note

🔒 Integrity filter blocked 4 items

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

• #83422 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #86273 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #115508 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #114358 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

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Summary

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0	0	0