[ci-scan] Test failure: GC/Regressions/v2.0-rtm/544701 NativeAOT allocation failure

## Build Information
Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1532833&view=results
Build error leg or test failing: linux-x64 Checked NativeAOT_Pri1 - GC/Regressions/v2.0-rtm/544701/544701/544701.dll

## Error Details

The GC regression test `544701` fails under NativeAOT with an unexpected exception during a large allocation on the runtime-nativeaot-outerloop pipeline (definition 265). The failure reproduces on the source build (1532833, finished 2026-07-30 15:02) and the following completed build (1533287) across the linux x64 / arm64 NativeAOT legs.

This is a post-close recurrence of the previously-filed KBE #131529, which was closed 2026-07-30 09:19; the signature reproduces again in builds that finished after that close. The sibling tests 445488 and 460373 (also `System.OutOfMemoryException`) were seen only in the source build and not the follow-up, so this KBE is scoped to the persisting `544701` signature.

```
Running test: GC/Regressions/v2.0-rtm/544701/544701/544701.dll
Unexpected Exception when allocating 41938869 bytes.
Test Failed
Xunit.Sdk.EqualException: Assert.Equal() Failure: Values differ
Expected: 100
Actual: -1
Failed test: GC/Regressions/v2.0-rtm/544701/544701/544701.dll
```

Related: dotnet/runtime#131529

## Error Message

```json
{
"ErrorMessage": "",
"ErrorPattern": [
"Running test: GC.Regressions.v2.0-rtm.*544701.dll",
"Unexpected Exception when allocating 41938869 bytes.",
"Failed test: GC.Regressions.v2.0-rtm.*544701.dll"
],
"BuildRetry": false,
"ExcludeConsoleLog": false
}
```

---
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 an AI agent (Copilot-based CI failure scan workflow).

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>
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>> To allow these domains, add them to the `network.allowed` list in your workflow frontmatter:
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> Generated by [CI Outer-Loop Failure Scanner](https://github.com/dotnet/runtime/actions/runs/30595278608) · 675.2 AIC · ⌖ 17.8 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)

### Report

|Build|Repository|Test|Pull Request|
|---|---|---|---|
|[1537347](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1537347)|dotnet/runtime|[GC/Regressions/v2.0-rtm/544701/544701/544701.dll](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1537347&view=ms.vss-test-web.build-test-results-tab&runId=42340648&resultId=123245)|dotnet/runtime#131727|
|[1536986](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1536986)|dotnet/runtime|[GC/API/GC/GetTotalAllocatedBytesServerGC/GetTotalAllocatedBytesServerGC.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1536986&view=ms.vss-test-web.build-test-results-tab&runId=42329420&resultId=125052)||
|[1536541](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1536541)|dotnet/runtime|[GC/API/GC/GetTotalAllocatedBytesServerGC/GetTotalAllocatedBytesServerGC.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1536541&view=ms.vss-test-web.build-test-results-tab&runId=42313666&resultId=123052)||
|[1536350](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1536350)|dotnet/runtime|[GC/API/GC/GetTotalAllocatedBytesServerGC/GetTotalAllocatedBytesServerGC.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1536350&view=ms.vss-test-web.build-test-results-tab&runId=42306966&resultId=122483)||
|[1536154](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1536154)|dotnet/runtime|[GC/API/GC/GetTotalAllocatedBytesServerGC/GetTotalAllocatedBytesServerGC.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1536154&view=ms.vss-test-web.build-test-results-tab&runId=42301168&resultId=125356)||
|[1535811](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1535811)|dotnet/runtime|[GC/API/GC/GetTotalAllocatedBytesServerGC/GetTotalAllocatedBytesServerGC.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1535811&view=ms.vss-test-web.build-test-results-tab&runId=42292984&resultId=125257)||
|[1535331](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1535331)|dotnet/runtime|[GC/API/GC/GetTotalAllocatedBytesServerGC/GetTotalAllocatedBytesServerGC.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1535331&view=ms.vss-test-web.build-test-results-tab&runId=42282222&resultId=125243)||
|[1534392](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1534392)|dotnet/runtime|[GC/API/GC/GetTotalAllocatedBytesServerGC/GetTotalAllocatedBytesServerGC.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1534392&view=ms.vss-test-web.build-test-results-tab&runId=42256998&resultId=123224)||
|[1533803](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1533803)|dotnet/runtime|[GC/API/GC/GetTotalAllocatedBytesServerGC/GetTotalAllocatedBytesServerGC.cmd](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1533803&view=ms.vss-test-web.build-test-results-tab&runId=42239866&resultId=125252)||
#### Summary
|24-Hour Hit Count|7-Day Hit Count|1-Month Count|
|---|---|---|
|3|9|9|

### Known issue validation
**Build: :mag_right:** https://dev.azure.com/dnceng-public/public/_build/results?buildId=1532833
**Error message validated:** `[Running test: GC.Regressions.v2.0-rtm.544701.544701.544701.dll Unexpected Exception when allocating 41938869 bytes. Failed test: GC.Regressions.v2.0-rtm.544701.544701.544701.dll`]
**Result validation:** :white_check_mark: Known issue matched with the provided build.
**Validation performed at:** 8/3/2026 9:27:27 PM UTC

### Known issue validation
**Build: :mag_right:** https://dev.azure.com/dnceng-public/public/_build/results?buildId=1532833
**Error message validated:** `[Running test: GC.Regressions.v2.0-rtm.*544701.dll Unexpected Exception when allocating 41938869 bytes. Failed test: GC.Regressions.v2.0-rtm.*544701.dll`]
**Result validation:** :white_check_mark: Known issue matched with the provided build.
**Validation performed at:** 8/3/2026 9:28:43 PM UTC

### Report
#### Summary
|24-Hour Hit Count|7-Day Hit Count|1-Month Count|
|---|---|---|
|0|0|0|

### Known issue validation
**Build: :mag_right:** https://dev.azure.com/dnceng-public/public/_build/results?buildId=1532833
**Error message validated:** `[Running test: GC.Regressions.v2.0-rtm.544701.544701.544701.dll Unexpected Exception when allocating 41938869 bytes. Failed test: GC.Regressions.v2.0-rtm.544701.544701.544701.dll`]
**Result validation:** :white_check_mark: Known issue matched with the provided build.
**Validation performed at:** 8/3/2026 9:27:27 PM UTC

### Known issue validation
**Build: :mag_right:** https://dev.azure.com/dnceng-public/public/_build/results?buildId=1532833
**Error message validated:** `[Running test: GC.Regressions.v2.0-rtm.*544701.dll Unexpected Exception when allocating 41938869 bytes. Failed test: GC.Regressions.v2.0-rtm.*544701.dll`]
**Result validation:** :white_check_mark: Known issue matched with the provided build.
**Validation performed at:** 8/3/2026 9:28:43 PM UTC