[ci-scan] Hang: baseservices/exceptions/OutOfMemoryException

[lewing]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1612477
Build error leg or test failing: coreclr windows x86 Checked no_tiered_compilation @ Windows.10.Amd64.Open-baseservices/exceptions/OutOfMemoryException/OutOfMemoryException/OutOfMemoryException.cmd
Pull request: #134606

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

Testing OOM with small allocations...
Subprocess timed out after 60 seconds.
Expected: 100
Actual: -1

The out-of-process OOM subprocess hangs instead of throwing OutOfMemoryException. Likely the same underlying behavior as #129135 (osx x64); this occurrence is Windows x86. The PR's change is FEATURE_PORTABLE_ENTRYPOINTS-only (browser Wasm), so it is unrelated.

Error Message

{
  "ErrorMessage": ["Testing OOM with small allocations...", "Subprocess timed out after 60 seconds."],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": true
}

Agentic workflow metadata (ci-failure-scan)

Workflow artifact: ci-failure-scan
Artifact kind: kbe-verification
Verified match count: 1 hit per signature line in failure.log

Note

This issue was drafted with GitHub Copilot.

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1612477
Error message validated: [Testing OOM with small allocations... Subprocess timed out after 60 seconds.]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 9/25/2026 9:24:05 PM UTC

Report

Build	Repository	Test	Pull Request
1622562	dotnet/runtime	baseservices/exceptions/OutOfMemoryException/OutOfMemoryException/OutOfMemoryException.cmd	#135144
1622066	dotnet/runtime	baseservices/exceptions/OutOfMemoryException/OutOfMemoryException/OutOfMemoryException.cmd
1612477	dotnet/runtime	baseservices/exceptions/OutOfMemoryException/OutOfMemoryException/OutOfMemoryException.cmd	#134606

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	2	3

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