EmccCompile task fails with This object is no longer valid because the MetadataLoadContext that created it has been disposed.

[jkotas]

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1138483
Build error leg or test failing: WasmTestOnChrome-ST-System.Runtime.Tests.WorkItemExecution
Pull request: #119218

Error Message

Fill the error message using step by step known issues guidance.

{
  "ErrorMessage": "",
  "ErrorPattern": "EmccCompile.*This object is no longer valid because the MetadataLoadContext that created it has been disposed.",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1138483
Error message validated: [EmccCompile.*This object is no longer valid because the MetadataLoadContext that created it has been disposed.]
Result validation: ❌ Known issue did not match with the provided build.
Validation performed at: 9/3/2025 10:01:39 PM UTC

Report

Build	Definition	Test	Pull Request
1161477	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Serialization.Schema.Tests.WorkItemExecution
1161044	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Loader.RefEmitLoadContext.Tests.WorkItemExecution
1156839	dotnet/runtime	WasmTestOnChrome-ST-System.ValueTuple.Tests.WorkItemExecution
1156515	dotnet/runtime	WasmTestOnChrome-ST-System.Runtime.Intrinsics.Tests.WorkItemExecution	#111170

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	0	4

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Tagging subscribers to 'arch-wasm': @lewing
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[jkotas]

Log fragment:

  [51/74] System.Runtime.Serialization.Formatters.dll.bc -> System.Runtime.Serialization.Formatters.dll.o [took 3.18s]
C:\helix\work\correlation\build\wasm-shared\WasmApp.Common.targets(816,5): error MSB4217: Task host node exited prematurely. Diagnostic information may be found in files in the temporary files directory named MSBuild_*.failure.txt.  [C:\helix\work\workitem\e\publish\ProxyProjectForAOTOnHelix.proj]
C:\helix\work\correlation\build\wasm-shared\WasmApp.Common.targets(824,7): error MSB4027: The "EmccCompile" task generated invalid items from the "OutputFiles" output parameter. This object is no longer valid because the MetadataLoadContext that created it has been disposed. [C:\helix\work\workitem\e\publish\ProxyProjectForAOTOnHelix.proj]