[ci-scan] Test failure: GC/Regressions/Github/Runtime_129681 fails with coreclr_initialize 0x80004005 on osx x64
area-GC-coreclrblocking-clean-ciKnown Build Erroragentic-workflows
## 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](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545348) and persists into follow-up build [1545482](https://dev.azure.com/dnceng-public/public/_build/results?buildId=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
```json
{
"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](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545348) (2026-08-08) on both osx x64 machines and again in follow-up build [1545482](https://dev.azure.com/dnceng-public/public/_build/results?buildId=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: dotnet/runtime#132037. No open or merged PR references this signature.
---
Filed by [`ci-failure-scan`](https://github.com/dotnet/runtime/blob/main/.github/workflows/ci-failure-scan.md) (detection only). [`ci-failure-fix`](https://github.com/dotnet/runtime/blob/main/.github/workflows/ci-failure-fix.md) 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.
> [!WARNING]
> <details>
> <summary>Firewall blocked 1 domain</summary>
>
> The following domain was blocked by the firewall during workflow execution:
>
> - `awmgmcpg`
>> To allow these domains, add them to the `network.allowed` list in your workflow frontmatter:
>
> ```yaml
> network:
> allowed:
> - defaults
> - "awmgmcpg"
> ```
>
> See [Network Configuration](https://github.github.com/gh-aw/reference/network/) for more information.
>
> </details>
> Generated by [CI Outer-Loop Failure Scanner](https://github.com/dotnet/runtime/actions/runs/31286982339) · 719.9 AIC · ⌖ 16.6 AIC · ⊞ 18.3K · [◷](https://github.com/search?q=repo%3Adotnet%2Fruntime+is%3Aissue+%22gh-aw-workflow-call-id%3A+dotnet%2Fruntime%2Fci-failure-scan%22&type=issues)
<!-- gh-aw-agentic-workflow: CI Outer-Loop Failure Scanner, engine: copilot, version: 1.0.68, model: claude-opus-4.8, id: 31286982339, workflow_id: ci-failure-scan, run: https://github.com/dotnet/runtime/actions/runs/31286982339 -->
<!-- gh-aw-workflow-id: ci-failure-scan -->
<!-- gh-aw-workflow-call-id: dotnet/runtime/ci-failure-scan -->
<!--Known issue error report start -->
### Report
|Build|Repository|Test|Pull Request|
|---|---|---|---|
|[1552265](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1552265)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1552265&view=ms.vss-test-web.build-test-results-tab&runId=42737560&resultId=117714)|dotnet/runtime#131538|
|[1552287](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1552287)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1552287&view=ms.vss-test-web.build-test-results-tab&runId=42736690&resultId=117239)|dotnet/runtime#131552|
|[1551482](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1551482)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1551482&view=ms.vss-test-web.build-test-results-tab&runId=42712858&resultId=117239)|dotnet/runtime#131308|
|[1551362](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1551362)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1551362&view=ms.vss-test-web.build-test-results-tab&runId=42709664&resultId=118043)||
|[1551126](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1551126)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1551126&view=ms.vss-test-web.build-test-results-tab&runId=42704830&resultId=118059)|dotnet/runtime#131538|
|[1551137](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1551137)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1551137&view=ms.vss-test-web.build-test-results-tab&runId=42704602&resultId=117239)|dotnet/runtime#131552|
|[1550751](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1550751)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1550751&view=ms.vss-test-web.build-test-results-tab&runId=42695800&resultId=117238)|dotnet/runtime#131552|
|[1550644](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1550644)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1550644&view=ms.vss-test-web.build-test-results-tab&runId=42693548&resultId=109177)|dotnet/runtime#131508|
|[1550566](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1550566)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1550566&view=ms.vss-test-web.build-test-results-tab&runId=42693046&resultId=118061)|dotnet/runtime#131538|
|[1549796](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1549796)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1549796&view=ms.vss-test-web.build-test-results-tab&runId=42671852&resultId=118046)||
|[1549574](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1549574)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1549574&view=ms.vss-test-web.build-test-results-tab&runId=42664800&resultId=117713)||
|[1549409](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1549409)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1549409&view=ms.vss-test-web.build-test-results-tab&runId=42662088&resultId=118046)||
|[1549348](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1549348)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1549348&view=ms.vss-test-web.build-test-results-tab&runId=42657458&resultId=116909)|dotnet/runtime#131552|
|[1549190](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1549190)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1549190&view=ms.vss-test-web.build-test-results-tab&runId=42653646&resultId=117705)|dotnet/runtime#131538|
|[1548849](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1548849)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1548849&view=ms.vss-test-web.build-test-results-tab&runId=42646000&resultId=118058)||
|[1548707](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1548707)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1548707&view=ms.vss-test-web.build-test-results-tab&runId=42641146&resultId=117255)|dotnet/runtime#123920|
|[1548635](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1548635)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1548635&view=ms.vss-test-web.build-test-results-tab&runId=42640324&resultId=117028)|dotnet/runtime#132141|
|[1547969](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1547969)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1547969&view=ms.vss-test-web.build-test-results-tab&runId=42621926&resultId=117700)||
|[1547744](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1547744)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1547744&view=ms.vss-test-web.build-test-results-tab&runId=42616950&resultId=118046)||
|[1547693](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1547693)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1547693&view=ms.vss-test-web.build-test-results-tab&runId=42615162&resultId=117255)|dotnet/runtime#123920|
|[1547568](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1547568)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1547568&view=ms.vss-test-web.build-test-results-tab&runId=42612116&resultId=118046)||
|[1547509](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1547509)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1547509&view=ms.vss-test-web.build-test-results-tab&runId=42610188&resultId=117255)|dotnet/runtime#131552|
|[1547335](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1547335)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1547335&view=ms.vss-test-web.build-test-results-tab&runId=42605964&resultId=117112)|dotnet/runtime#131552|
|[1547208](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1547208)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1547208&view=ms.vss-test-web.build-test-results-tab&runId=42602148&resultId=118059)||
|[1547112](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1547112)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1547112&view=ms.vss-test-web.build-test-results-tab&runId=42601290&resultId=110149)|dotnet/runtime#131508|
|[1546439](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1546439)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1546439&view=ms.vss-test-web.build-test-results-tab&runId=42583906&resultId=118041)||
|[1546072](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1546072)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1546072&view=ms.vss-test-web.build-test-results-tab&runId=42573368&resultId=118054)||
|[1546024](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1546024)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1546024&view=ms.vss-test-web.build-test-results-tab&runId=42569960&resultId=117708)||
|[1545971](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545971)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545971&view=ms.vss-test-web.build-test-results-tab&runId=42569092&resultId=118054)||
|[1545891](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545891)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545891&view=ms.vss-test-web.build-test-results-tab&runId=42566040&resultId=118041)||
|[1545892](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545892)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545892&view=ms.vss-test-web.build-test-results-tab&runId=42565818&resultId=117618)||
|[1545884](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545884)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545884&view=ms.vss-test-web.build-test-results-tab&runId=42565354&resultId=118041)||
|[1545747](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545747)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545747&view=ms.vss-test-web.build-test-results-tab&runId=42562216&resultId=118054)||
|[1545742](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545742)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545742&view=ms.vss-test-web.build-test-results-tab&runId=42561410&resultId=118054)||
|[1545672](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545672)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545672&view=ms.vss-test-web.build-test-results-tab&runId=42559514&resultId=117664)||
|[1545609](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545609)|dotnet/runtime|[GC/Regressions/Github/Runtime_129681/Runtime_129681/Runtime_129681.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545609&view=ms.vss-test-web.build-test-results-tab&runId=42557886&resultId=117708)||
#### Summary
|24-Hour Hit Count|7-Day Hit Count|1-Month Count|
|---|---|---|
|0|0|36|
<!--Known issue error report end -->
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