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

[github-actions]

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.

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

Report

Build	Repository	Test	Pull Request
1552265	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd	#131538
1552287	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd	#131552
1551482	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd	#131308
1551362	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
1551126	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd	#131538
1551137	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd	#131552
1550751	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd	#131552
1550644	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd	#131508
1550566	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd	#131538
1549796	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
1549574	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
1549409	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
1549348	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd	#131552
1549190	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd	#131538
1548849	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
1548707	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd	#123920
1548635	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd	#132141
1547969	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
1547744	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
1547693	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd	#123920
1547568	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
1547509	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd	#131552
1547335	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd	#131552
1547208	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
1547112	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd	#131508
1546439	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
1546072	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
1546024	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
1545971	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
1545891	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
1545892	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
1545884	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
1545747	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
1545742	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
1545672	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd
1545609	dotnet/runtime	GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	0	36

[VincentBu]

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)

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[kkokosa]

#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?

[janvorli]

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