baseservices failing for coreclr runtime-extra-platforms testing with "Process mlaunch exited with 1"

[jakobbotsch]

Example pipeline run: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1295625&view=results
Example console log: https://helixr1107v0xdeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-heads-main-bcc6da633d0b472aaa/baseservices/1/console.4a163b50.log

[22:55:36] dbug: Running /private/tmp/helix/working/BFF00A1A/p/microsoft.dotnet.xharness.cli/11.0.0-prerelease.26064.3/tools/net8.0/any/../../../runtimes/any/native/mlaunch/bin/mlaunch 
                 With env vars: 
                     DOTNET_CI = 'true'
[22:55:38] dbug: Process mlaunch exited with 1
[22:55:38] dbug: Test run failed

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1295625
Build error leg or test failing: baseservices-exceptions.WorkItemExecution
Pull request: #124373

Error Message

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

{
  "ErrorMessage": ["baseservices", "Process mlaunch exited with 1"],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1295625
Error message validated: [baseservices.r2r.dylib Process mlaunch exited with 1]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 2/16/2026 11:49:14 AM UTC

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1295625
Error message validated: [baseservices Process mlaunch exited with 1]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 2/16/2026 11:54:46 AM UTC

Report

Build	Repository	Test	Pull Request
1560940	dotnet/runtime	baseservices-exceptions.WorkItemExecution
1556412	dotnet/runtime	baseservices-exceptions.WorkItemExecution
1555560	dotnet/runtime	baseservices-exceptions.WorkItemExecution

Summary

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

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