[ci-scan] Test failure: GC/API/GC/GetGeneration/GetGeneration.dll fails under interpreter on osx-arm64

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Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1533324
Build error leg or test failing: coreclr osx arm64 Checked (interpreter modes: no_tiered_compilation, interpmode1) - GC/API/GC/GetGeneration/GetGeneration.dll

Error Details

The priority-0 GC test GC/API/GC/GetGeneration/GetGeneration.dll fails under interpreter execution on osx-arm64. Both the object and array generation checks return the wrong generation; the test asserts an expected sentinel value 100 but observes 1.

15:20:20.953 Running test: GC/API/GC/GetGeneration/GetGeneration.dll
ObjectTest Failed!
arrayTest Failed!
failTest Passed!
Test for GetGeneration() FAILED!
Xunit.Sdk.EqualException: Assert.Equal() Failure: Values differ
Expected: 100
Actual:   1

Occurrences: source build 1533324 (2026-07-30), follow-up build 1534710 (2026-07-31, GetGeneration fails on 4 legs), prior build 1531411 (2026-07-29). Stable across at least three consecutive interpreter runs.
First build it occurred: 1531411 (within scanned window).

Error Message

{
  "ErrorMessage": "Test GC/API/GC/GetGeneration/GetGeneration.dll has failed",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

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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 · 592.9 AIC · ⌖ 11.7 AIC · ⊞ 18.3K · ◷

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Summary

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