[ci-scan] Test failure: JIT/opt/GuardedDevirtualization/badinlinee/badinlinee.cmd on browser wasm #134292

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1603540
Build error leg or test failing: coreclr Pri1 Runtime Tests Run browser wasm checked - JIT.opt (JIT/opt/GuardedDevirtualization/badinlinee/badinlinee.cmd)

First build it occurred: consistently observed across the scanned window; present in every sampled runtime-coreclr outerloop (definition 108) build from 2026-09-18 through 2026-09-19 (builds 1601858, 1602146, 1602769, 1603316, 1603540) and reproduced in follow-up build 1603714. Persistent across the entire scanned window; true origin may predate 2026-09-18.

Error Details

The JIT/opt/GuardedDevirtualization/badinlinee/badinlinee.cmd test fails on the browser wasm checked leg. The out-of-process wrapper returns -1 instead of the expected 100:

10:27:23.706 Running test: JIT/opt/GuardedDevirtualization/badinlinee/badinlinee.cmd
Running: node --experimental-wasm-exnref --stack-size=8192 /root/helix/work/correlation/corerun.js -c /root/helix/work/correlation -p System.Reflection.Metadata.MetadataUpdater.IsSupported=false -p System.Runtime.Serialization.EnableUnsafeBinaryFormatterSerialization=true .../JIT/opt/GuardedDevirtualization/badinlinee/badinlinee.dll
Test allocated 12000 bytes
Xunit.Sdk.EqualException: Assert.Equal() Failure: Values differ
Expected: 100
Actual:   -1
   at Xunit.Assert.Equal[T](T expected, T actual, IEqualityComparer`1 comparer) in /_/src/arcade/src/Microsoft.DotNet.XUnitAssert/src/EqualityAsserts.cs:line 102
   at Xunit.Assert.Equal[T](T expected, T actual) in /_/src/arcade/src/Microsoft.DotNet.XUnitAssert/src/EqualityAsserts.cs:line 36
   at __GeneratedMainWrapper.Main()
10:27:23.784 Failed test: JIT/opt/GuardedDevirtualization/badinlinee/badinlinee.cmd

Both failed Helix work items in the source build (browser wasm checked jobs) are the same JIT.opt partition failing on this test.

Related closed tracker: #133974 (JIT: Rejecting a GDV candidate permanently marks the base virtual method as NOINLINE process-wide) describes the same guarded-devirtualization area; the wasm leg is still failing after that issue was closed.

Error Message

{
  "ErrorMessage": [
    "Running test: JIT/opt/GuardedDevirtualization/badinlinee/badinlinee.cmd",
    "Xunit.Sdk.EqualException: Assert.Equal() Failure: Values differ",
    "Failed test: JIT/opt/GuardedDevirtualization/badinlinee/badinlinee.cmd"
  ],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

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.

Generated by CI Outer-Loop Failure Scanner · opus48 · 1K AIC · ⌖ 16.4 AIC · ⊞ 19.2K · ◷

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