[wasm] Could not find an assembly named System.Private.CoreLib.*

[PranavSenthilnathan]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1162813&view=results
Build error leg or test failing: wasm (BuildWasmApps)

Error Message

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

{
  "ErrorMessage": "Could not find an assembly named System.Private.CoreLib.*",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

PR: #120126

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1162813
Error message validated: [Could not find an assembly named System.Private.CoreLib.*]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 10/3/2025 10:22:15 PM UTC

Report

Build	Definition	Test	Pull Request
1169836	dotnet/runtime	Wasm.Build.Tests.SatelliteAssembliesTests.CheckThatSatelliteAssembliesAreNotAOTed(config: Release, aot: True)	#120521
1169444	dotnet/runtime	Wasm.Build.Tests.SatelliteAssembliesTests.CheckThatSatelliteAssembliesAreNotAOTed(config: Release, aot: True)
1162813	dotnet/runtime	Wasm.Build.Tests.SatelliteAssembliesTests.CheckThatSatelliteAssembliesAreNotAOTed(config: Release, aot: True)	#120126

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	1	3

[dotnet-policy-service]

Tagging subscribers to 'arch-wasm': @lewing, @pavelsavara
See info in area-owners.md if you want to be subscribed.

[PranavSenthilnathan]

Note that the build having this error is for release/10.0-rc2. It also has the error mentioned in #109653 so maybe it's related.