[wasm][R2R] b68872 collides with first-pass ExInfo

[lewing]

Description

JIT/Regression/CLR-x86-JIT/V1-M12-Beta2/b68872 asserts during an exception filter in the browser-wasm CoreCLR ReadyToRun lane.

Reproduction Steps

Run the runtime-wasm-non-libtests pipeline with ReadyToRun tests enabled on dotnet/runtime commit ef1850bdc9e7d142888247d9bb5df3b74a7ae341 (Azure DevOps build 1588226, Helix job 2a25b357-0ff1-40a2-9fe9-5e205f73cb27, work item Regression_6).

Expected behavior

The test completes its exception-filter checks with exit code 100.

Actual behavior

Running test: JIT/Regression/CLR-x86-JIT/V1-M12-Beta2/b68872/b68872/b68872.dll
inside 1st filter

Assert failure(PID 42 [0x0000002a], Thread: 1 [0x0001]): did not expect to collide with a 1st-pass ExInfo during a EH stackwalk
    File: /__w/1/s/src/coreclr/vm/exceptionhandling.cpp:4273

Aborted(native code called abort())
RuntimeError: unreachable

Regression?

Unknown. This was reproduced on current main during the #133305 census.

Known Workarounds

Exclude only this IL project from browser CoreCLR ReadyToRun execution. Other Regression_6 tests and non-R2R configurations remain enabled.

Configuration

• dotnet/runtime commit ef1850bdc9e7d142888247d9bb5df3b74a7ae341
• CoreCLR browser-wasm
• Checked runtime
• ReadyToRun / crossgen2
• Node.js 23.11.1

Other information

Tracking issue: #133305.

Note

This issue was authored with GitHub Copilot.

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