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[ci-scan] Test failure: GC/Regressions/Github/Runtime_129681 fails with coreclr_initialize 0x80004005 on osx x64 #132045

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[ci-scan] Test failure: GC/Regressions/Github/Runtime_129681 fails with coreclr_initialize 0x80004005 on osx x64#132045
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Known Build ErrorUse this to report build issues in the .NET Helix tabagentic-workflowsarea-GC-coreclr

Description

@github-actions
github-actions
bot
opened on Aug 9, 2026

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545348
Build error leg or test failing: coreclr Pri1 Runtime Tests Run osx x64 checked — GC/Regressions/Github/Runtime_129681/Runtime_129681

Pipeline: runtime-coreclr outerloop (definition 108), branch main. The failure reproduces on both osx.15.amd64 machines behind the plain osx x64 checked leg (jobs e2334af3 / 1132d4aa) in source build 1545348 and persists into follow-up build 1545482 (job 31e71870).

This is a distinct failure mode from the Crossgen2 exit-255 signature tracked by #132037 on the R2R_CG2 osx x64 leg: here the plain (non-R2R) osx x64 leg runs the same test but the runtime host aborts during startup with coreclr_initialize failed - Error: 0x80004005. The Crossgen2 failed with exitcode: 255 line from #132037 does not appear in this log.

Error Details

Running test: GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
External disassembler is not available.
BEGIN: coreclr_initialize failed - Error: 0x80004005
END: coreclr_initialize failed - Error: 0x80004005

Return code:      1
...
Expected: 100
Actual: 255
END EXECUTION - FAILED
Test Harness Exitcode is : 1

Error Message

{
  "ErrorMessage": [
    "Running test: GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd",
    "BEGIN: coreclr_initialize failed - Error: 0x80004005"
  ],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

First build it occurred

Observed in source build 1545348 (2026-08-08) on both osx x64 machines and again in follow-up build 1545482 (2026-08-08) — at least two distinct builds.

Duplicate search

Searched open and closed issues/KBEs for Runtime_129681, coreclr_initialize failed, and 0x80004005: the only existing test-specific KBE is #132037, which matches a different signature (Crossgen2 failed with exitcode: 255) on the R2R_CG2 leg and does not match this plain-leg startup failure. Related: #132037. No open or merged PR references this signature.

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 GitHub Copilot agentic workflow.

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Generated by CI Outer-Loop Failure Scanner · 719.9 AIC · ⌖ 16.6 AIC · ⊞ 18.3K · ◷

Report

Summary

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

Activity

  1. github-actions
    added
    blocking-clean-ciBlocking PR or rolling runs of 'runtime' or 'runtime-extra-platforms'
    Known Build ErrorUse this to report build issues in the .NET Helix tab
    agentic-workflows
    on Aug 9, 2026
  2. dotnet-policy-service
    added
    untriagedNew issue has not been triaged by the area owner
    on Aug 9, 2026

  3. VincentBu commented on Aug 10, 2026

    @VincentBu
    VincentBu
    on Aug 10, 2026
    Contributor

    Failed in: runtime-coreclr ilasm 20260808.1

    Failed tests:

    coreclr osx x64 Checked ilasmroundtrip @ OSX.15.Amd64.Open
- GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd

    Error message:

    External disassembler is not available.
BEGIN: coreclr_initialize failed - Error: 0x80004005
END: coreclr_initialize failed - Error: 0x80004005

Return code:      1
Raw output file:      /tmp/helix/working/B71A099B/w/B05D0957/uploads/Regressions/Github/Runtime_129681/Runtime_129681/output.txt
Raw output:
BEGIN EXECUTION

.NET IL Assembler.  Version 11.0.0-ci
Copyright (c) Microsoft Corporation.  All rights reserved.
Assembling 'IL-RT/Runtime_129681.il'  to EXE --> 'Runtime_129681.dll'
Source file is UNICODE

Assembled method Runtime_129681::TestEntryPoint
Assembled method Runtime_129681::.ctor
Assembled method __GeneratedMainWrapper::Main
Assembled method __GeneratedMainWrapper::.ctor
Creating PE file

Emitting classes:
Class 1:	Runtime_129681
Class 2:	__GeneratedMainWrapper

Emitting fields and methods:
Global 	
Class 1	Fields: 1;	Methods: 2;	
Class 2	Methods: 2;	
Resolving local member refs: 1 -> 1 defs, 0 refs, 0 unresolved

Emitting events and properties:
Global 	
Class 1	
Class 2	
Resolving local member refs: 0 -> 0 defs, 0 refs, 0 unresolved
Writing PE file
Operation completed successfully

.NET IL Assembler.  Version 11.0.0-ci
Copyright (c) Microsoft Corporation.  All rights reserved.
Assembling 'IL-RT/Runtime_129681.il'  to EXE --> 'Runtime_129681.dll'
Source file is UNICODE

Assembled method Runtime_129681::TestEntryPoint
Assembled method Runtime_129681::.ctor
Assembled method __GeneratedMainWrapper::Main
Assembled method __GeneratedMainWrapper::.ctor
Creating PE file

Emitting classes:
Class 1:	Runtime_129681
Class 2:	__GeneratedMainWrapper

Emitting fields and methods:
Global 	
Class 1	Fields: 1;	Methods: 2;	
Class 2	Methods: 2;	
Resolving local member refs: 1 -> 1 defs, 0 refs, 0 unresolved

Emitting events and properties:
Global 	
Class 1	
Class 2	
Resolving local member refs: 0 -> 0 defs, 0 refs, 0 unresolved
Writing PE file
Operation completed successfully

.NET IL Assembler.  Version 11.0.0-ci
Copyright (c) Microsoft Corporation.  All rights reserved.
Assembling 'IL-RT/Runtime_129681.il'  to EXE --> 'Runtime_129681.pdb'
Source file is UNICODE

Assembled method Runtime_129681::TestEntryPoint
Assembled method Runtime_129681::.ctor
Assembled method __GeneratedMainWrapper::Main
Assembled method __GeneratedMainWrapper::.ctor
Creating PE file

Emitting classes:
Class 1:	Runtime_129681
Class 2:	__GeneratedMainWrapper

Emitting fields and methods:
Global 	
Class 1	Fields: 1;	Methods: 2;	
Class 2	Methods: 2;	
Resolving local member refs: 1 -> 1 defs, 0 refs, 0 unresolved

Emitting events and properties:
Global 	
Class 1	
Class 2	
Resolving local member refs: 0 -> 0 defs, 0 refs, 0 unresolved
Writing PE file
Writing PDB file: /private/tmp/helix/working/B71A099B/w/B05D0957/e/GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.pdb
Operation completed successfully

.NET IL Assembler.  Version 11.0.0-ci
Copyright (c) Microsoft Corporation.  All rights reserved.
Assembling 'IL-RT/Runtime_129681.il'  to EXE --> 'Runtime_129681.pdb'
Source file is UNICODE

Assembled method Runtime_129681::TestEntryPoint
Assembled method Runtime_129681::.ctor
Assembled method __GeneratedMainWrapper::Main
Assembled method __GeneratedMainWrapper::.ctor
Creating PE file

Emitting classes:
Class 1:	Runtime_129681
Class 2:	__GeneratedMainWrapper

Emitting fields and methods:
Global 	
Class 1	Fields: 1;	Methods: 2;	
Class 2	Methods: 2;	
Resolving local member refs: 1 -> 1 defs, 0 refs, 0 unresolved

Emitting events and properties:
Global 	
Class 1	
Class 2	
Resolving local member refs: 0 -> 0 defs, 0 refs, 0 unresolved
Writing PE file
Writing PDB file: /private/tmp/helix/working/B71A099B/w/B05D0957/e/GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.pdb
Operation completed successfully

ILASM RoundTrips
ILASM RoundTrip for Runtime_129681.dll
/tmp/helix/working/B71A099B/p/ildasm -raweh -unicode -out=IL-RT/Runtime_129681.il IL-RT/Runtime_129681.dll
/tmp/helix/working/B71A099B/p/ilasm -output=Runtime_129681.dll -DET IL-RT/

    Stack trace:

       at Xunit.Assert.True(Nullable`1 condition, String userMessage) in /_/src/arcade/src/Microsoft.DotNet.XUnitAssert/src/BooleanAsserts.cs:line 135
   at TestLibrary.OutOfProcessTest.RunOutOfProcessTest(String assemblyPath, String testPathPrefix)
   at Program.<<Main>$>g__TestExecutor106|0_107(StreamWriter tempLogSw, StreamWriter statsCsvSw, StreamWriter outOfProcessPlanWriter, <>c__DisplayClass0_0& A_3)
  4. jeffschwMSFT
    added
    area-GC-coreclr
    on Aug 10, 2026
  5. github-project-automation
    added this to AppModelon Aug 10, 2026

  6. dotnet-policy-service commented on Aug 10, 2026

    @dotnet-policy-service
    dotnet-policy-serviceBot
    on Aug 10, 2026 – with Dotnet Policy Service
    Contributor

    Tagging subscribers to this area: @anicka-net, @dotnet/gc
    See info in area-owners.md if you want to be subscribed.

  7. jkotas
    added a commit that references this issue on Aug 12, 2026

    Disable Runtime_129681 CrossGen2 testing (#132126)

    89c45f7

  8. kkokosa commented on Aug 21, 2026

    @kkokosa
    kkokosa
    on Aug 21, 2026
    Member

    #132199 stopped this failure by removing DOTNET_GCStress=0xC, but it also removed an essential condition of the #129681 regression test: GCStress implicitly disabled concurrent GC. With concurrent GC enabled, the mark array exists and the bookkeeping-layout path fixed by #131947 is not exercised.

    The test should explicitly set DOTNET_gcConcurrent=0 instead of restoring GCStress. This preserves the intended regression coverage without causing the macOS startup failure.

    /cc: @janvorli could you confirm?

  9. kkokosa
    removed
    untriagedNew issue has not been triaged by the area owner
    on Aug 21, 2026

  10. janvorli commented on Aug 21, 2026

    @janvorli
    janvorli
    on Aug 21, 2026
    Member

    This issue seems to be distinct one, not triggered by the GC stress setting. Here the coreclr_initialize fails with general error (0x80004005).

  11. github-actions commented on Sep 14, 2026

    @github-actions
    github-actionsBot
    on Sep 14, 2026 – with GitHub Actions
    ContributorAuthor

    Workflow artifact: ci-fix
    Artifact kind: handoff
    Linked KBE: #132045

    Note

    AI/Copilot-generated triage note.

    This Known Build Error has no producible automated code change (reason: non-code/infra runtime-startup failure), so I could not open even a best-effort PR. Looping in owners so it can be fixed forward rather than muted.

    Root cause (best analysis)

    On the plain (non-R2R) osx x64 checked leg of runtime-coreclr outerloop (def 108), GC/Regressions/Github/Runtime_129681 never runs its body: the runtime host aborts during startup with BEGIN: coreclr_initialize failed - Error: 0x80004005 (E_FAIL), the harness records Actual: 255, and the work item fails. Because the failure is in coreclr_initialize before managed code executes, it is a host/runtime startup problem on the osx.15.amd64 queue, not a GC regression in the test itself. This is distinct from the Crossgen2 exit-255 signature tracked by #132037 (that log shows Crossgen2 failed with exitcode: 255, which is absent here).

    Evidence

    Suggested reviewers / area contacts

    • Area owners (area-GC-coreclr): @anicka-net, @dotnet/gc

    A fix likely involves diagnosing why coreclr_initialize returns E_FAIL on the osx.15.amd64 outerloop queue (host/runtime layout or environment on that image), since managed test code never starts.

    Structured data:

    {
  "artifact_kind": "handoff",
  "linked_kbe": 132045,
  "workflow_artifact": "ci-fix"
}

    Generated by CI Outer-Loop Failure Fixer · opus48 · 444.8 AIC · ⌖ 28.9 AIC · ⊞ 19.6K · ◷

  12. jeffschwMSFT
    removed
    blocking-clean-ciBlocking PR or rolling runs of 'runtime' or 'runtime-extra-platforms'
    on Sep 15, 2026

  13. jeffschwMSFT commented on Sep 15, 2026

    @jeffschwMSFT
    jeffschwMSFT
    on Sep 15, 2026
    Member

    removing blocking-clean-ci as it has not failed in 30 days

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

  14. kotlarmilos commented on Oct 2, 2026

    @kotlarmilos
    kotlarmilos
    on Oct 2, 2026
    Member

    Closing, fixed by #131947 and no hits in the last month.

    Note

    This comment was drafted with GitHub Copilot.

  15. kotlarmilos
    closed this as completedon Oct 2, 2026
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