[ci-scan] Test failure: GC/Regressions/Github/Runtime_129681 Crossgen2 exit -1 on windows x64 R2R #132062

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1545742
Build error leg or test failing: coreclr Pri1 Runtime Tests Run R2R_CG2 windows x64 checked — GC/Regressions/Github/Runtime_129681/Runtime_129681

Pipeline: runtime-coreclr outerloop (definition 108), branch main. On the R2R_CG2 windows x64 checked leg the GC/Regressions/Github/Runtime_129681 test compiles its assembly with Crossgen2 (--verify-type-and-field-layout, --method-layout:random, targeting windows/x64) before running, and Crossgen2 aborts with exit code -1, so the test harness records a non-zero exit and the test fails. The signature reproduces in source build 1545742 on both windows x64 R2R Helix work items and persists into follow-up build 1545892.

This is a distinct failure mode from the osx x64 signatures already tracked: #132037 matches Crossgen2 failed with exitcode: 255 on the osx x64 R2R leg, and #132045 matches coreclr_initialize failed - Error: 0x80004005 on the plain osx x64 leg. Neither the osx exit-255 text nor the osx startup abort appears in this windows log — here Crossgen2 exits with -1 on windows/x64.

Error Details

BEGIN EXECUTION
Runtime_129681.dll
Response file: ...\GC\Regressions\Github\Runtime_129681\Runtime_129681\Runtime_129681.dll.rsp
--targetarch:x64
--targetos:windows
--verify-type-and-field-layout
--method-layout:random
Running CrossGen2:  crossgen2.exe @...Runtime_129681.dll.rsp
Crossgen2 failed with exitcode - -1
Test Harness Exitcode is : 1

Error Message

{
  "ErrorMessage": [
    "GC\\Regressions\\Github\\Runtime_129681\\Runtime_129681\\Runtime_129681.dll.rsp",
    "Crossgen2 failed with exitcode - -1"
  ],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

First build it occurred

Observed in source build 1545742 (2026-08-09) on both windows x64 R2R Helix work items and again in follow-up build 1545892 (2026-08-09) — at least two distinct builds. The related osx R2R exit-255 signature (#132037) first appeared in build 1545184 (2026-08-08), so this test family has been broken across R2R legs since ~2026-08-08.

Duplicate search

Searched open and closed issues/KBEs for Runtime_129681, Crossgen2 failed with exitcode, and -1: the only existing test-specific KBEs are #132037 (osx x64 R2R, exitcode: 255) and #132045 (osx x64 plain, coreclr_initialize 0x80004005); neither matches this windows x64 R2R exitcode - -1 signature. Related: #132037, #132045. No open or merged PR references this windows Crossgen2 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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