[ci-scan] Test failure: GC/API/GC/GetGeneration/GetGeneration.dll fails under interpreter (post-fix recurrence) #131914

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1540937
Build error leg or test failing: coreclr Pri1 Runtime Tests Run (interpreter) - GC/API/GC/GetGeneration/GetGeneration.dll

Error Details

The GetGeneration GC API test fails under the CoreCLR interpreter (runtime-interpreter pipeline) across all test legs. GC.GetGeneration returns the wrong generation number, so the test's ObjectTest and arrayTest cases fail an equality assertion (Expected 100, Actual 1).

Note: test-disable PR #131816 (Disable GetGeneration test under interpreter (InterpreterIncompatible), merged 2026-08-05T06:23Z) is already present in this build's source commit, and its [ci-scan] predecessor #131743 was already closed (2026-08-03). The failure still reproduces after that fix merged in build 1540937 (finished 2026-08-05T15:38Z) and again in the follow-up build 1541602, so the disable did not take effect for these interpreter legs — this is a genuine post-fix recurrence.

11:05:44.354 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
11:05:44.533 Failed test: GC/API/GC/GetGeneration/GetGeneration.dll

Error Message

{
  "ErrorMessage": [
    "Test for GetGeneration() FAILED!",
    "Failed test: GC/API/GC/GetGeneration/GetGeneration.dll"
  ],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Related: #131743 (closed [ci-scan] predecessor), #131816 (merged disable PR that did not suppress this recurrence).

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.

network:
  allowed:
    - defaults
    - "awmgmcpg"

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