[ci-scan] Test failure: Loader/ContextualReflection asserts OBJECTREF in preemptive GC mode on browser-wasm interpreter #131980

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1542249
Build error leg or test failing: coreclr Pri1 Runtime Tests Run browser wasm checked — Loader/ContextualReflection/ContextualReflection

Error Details

On the runtime-coreclr outerloop browser wasm checked leg (interpreter), Loader/ContextualReflection/ContextualReflection.cmd fails with a native runtime assert while running the out-of-process wasm test under node. The assert fires inside Object::Validate when an OBJECTREF is accessed while the thread is in preemptive GC mode:

ASSERT FAILED
	Expression: !"OBJECTREF being accessed while thread is in preemptive GC mode."
	Location:   /__w/1/s/src/coreclr/vm/object.cpp:514
	Function:   Validate
	Process:    42
Frame (InterpreterFrame): 0x4ff358
   0) Xunit.Assert::GetEqualityComparer, IR_0007
   1) Xunit.Assert::Equal, IR_0010
   2) ContextualReflectionTest.TestResolve::Assert, IR_002e
   ...
  10) __GeneratedMainWrapper::Main, IR_0020
...
END EXECUTION - FAILED
Return code:      1
Xunit.Sdk.TrueException: Out-of-process wrapper failed with exit code 1.

The failure reproduces in the follow-up build (1543091), where the same leg fails again on this test. The failure is specific to the wasm interpreter execution path.

Error Message

{
  "ErrorMessage": [
    "Loader/ContextualReflection/ContextualReflection/ContextualReflection.cmd",
    "OBJECTREF being accessed while thread is in preemptive GC mode."
  ],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

network:
  allowed:
    - defaults
    - "awmgmcpg"

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