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[wasm] foreground-shutdown test fails with PlatformNotSupportedException from Thread.Start #131899
Description
Build Information
Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1540634
Build error leg or test failing: baseservices/threading/regressions/2164/foreground-shutdown/foreground-shutdown.cmd
Pull request: N/A
Error Message
Fill the error message using step by step known issues guidance.
{
"ErrorMessage": [
"Unhandled exception. System.PlatformNotSupportedException: Operation is not supported on this platform.",
"System.Runtime.CompilerServices.RuntimeFeature.ThrowIfMultithreadingIsNotSupported()"
],
"ErrorPattern": "",
"BuildRetry": false,
"ExcludeConsoleLog": false
}Suggested fix
Exclude the test for browser/single-threaded wasm, or gate it on FeatureWasmManagedThreads.
Known issue validation
Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1540634
Error message validated: [Unhandled exception. System.PlatformNotSupportedException: Operation is not supported on this platform. System.Runtime.CompilerServices.RuntimeFeature.ThrowIfMultithreadingIsNotSupported()]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 8/5/2026 7:36:55 PM UTC
Report
| Build | Repository | Test | Pull Request |
|---|---|---|---|
| 1626226 | dotnet/runtime | GC/Scenarios/Dynamo/dynamo/dynamo.cmd | #135335 |
Summary
| 24-Hour Hit Count | 7-Day Hit Count | 1-Month Count |
|---|---|---|
| 0 | 0 | 1 |
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JulieLeeMSFT commentedon Aug 5, 2026
cc @AndyAyersMS.
dotnet-policy-service commentedon Aug 5, 2026
Tagging subscribers to 'arch-wasm': @lewing, @pavelsavara
See info in area-owners.md if you want to be subscribed.
dotnet-policy-service commentedon Aug 5, 2026
Tagging subscribers to this area: @agocke
See info in area-owners.md if you want to be subscribed.
JulieLeeMSFT commentedon Aug 5, 2026
In the same pipeline, another test failed:
Console log: Link
radekdoulik commentedon Aug 6, 2026
This should be fixed by #131883 Lets wait for few more CI runs to be sure.
jeffschwMSFT commentedon Sep 8, 2026
removing blocking-clean-ci as it has not failed in 30 days
24-Hour Hit Count 7-Day Hit Count 1-Month Count
0 0 0