Crash in WKS::gc_heap::background_promote (x86, segments)

Access violation at:
```
ntdll!KiUserExceptionDispatcher+0xf [d:\rs1\minkernel\ntos\rtl\i386\userdisp.asm @ 597]
coreclr!WKS::mark_bit_bit_of+0xb [D:\a\_work\1\s\src\coreclr\gc\gc.cpp @ 9024]
coreclr!WKS::gc_heap::mark_array_marked+0x16 [D:\a\_work\1\s\src\coreclr\gc\gc.cpp @ 9030]
coreclr!WKS::gc_heap::background_mark1+0x16 [D:\a\_work\1\s\src\coreclr\gc\gc.cpp @ 27214]
coreclr!WKS::gc_heap::background_mark+0x2e [D:\a\_work\1\s\src\coreclr\gc\gc.cpp @ 27234]
coreclr!WKS::gc_heap::background_mark_simple1+0x6ae [D:\a\_work\1\s\src\coreclr\gc\gc.cpp @ 28529]
coreclr!WKS::gc_heap::background_mark_simple+0x5e [D:\a\_work\1\s\src\coreclr\gc\gc.cpp @ 28637]
coreclr!WKS::gc_heap::background_promote+0x109 [D:\a\_work\1\s\src\coreclr\gc\gc.cpp @ 28716]
coreclr!PromoteObject+0xf3 [D:\a\_work\1\s\src\coreclr\gc\objecthandle.cpp @ 351]
```

## Build Information
Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1173493
Build error leg or test failing: System.Private.Xml.Tests.WorkItemExecution
Pull request: https://github.com/dotnet/runtime/pull/120674

## Error Message

Fill the error message using [step by step known issues guidance](https://github.com/dotnet/arcade/blob/main/Documentation/Projects/Build%20Analysis/KnownIssueJsonStepByStep.md).

```json
{
"ErrorMessage": ["gc_heap::background_mark_simple1","gc_heap::background_promote"],
"ErrorPattern": "",
"BuildRetry": false,
"ExcludeConsoleLog": false
}
```

### Known issue validation
**Build: :mag_right:** https://dev.azure.com/dnceng-public/public/_build/results?buildId=1173493
**Error message validated:** `[System.Private.Xml.Tests gc_heap::background_promote`]
**Result validation:** :white_check_mark: Known issue matched with the provided build.
**Validation performed at:** 10/17/2025 2:15:29 AM UTC

### Report

|Build|Definition|Test|Pull Request|
|---|---|---|---|
|[1173493](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1173493)|dotnet/runtime|[System.Private.Xml.Tests.WorkItemExecution](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1173493&view=ms.vss-test-web.build-test-results-tab&runId=32477038&resultId=217557)|dotnet/runtime#120674|
#### Summary
|24-Hour Hit Count|7-Day Hit Count|1-Month Count|
|---|---|---|
|0|1|1|

### Known issue validation
**Build: :mag_right:** https://dev.azure.com/dnceng-public/public/_build/results?buildId=1173493
**Error message validated:** `[gc_heap::background_mark_simple1 gc_heap::background_promote`]
**Result validation:** :white_check_mark: Known issue matched with the provided build.
**Validation performed at:** 10/17/2025 3:17:49 AM UTC

### Report

|Build|Definition|Test|Pull Request|
|---|---|---|---|
|[1173493](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1173493)|dotnet/runtime|[System.Private.Xml.Tests.WorkItemExecution](https://dev.azure.com/dnceng-public/public/_build/results?buildId=1173493&view=ms.vss-test-web.build-test-results-tab&runId=32477038&resultId=217557)|dotnet/runtime#120674|
#### Summary
|24-Hour Hit Count|7-Day Hit Count|1-Month Count|
|---|---|---|
|0|1|1|

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