aspnetcore build failure - Child node 7 exited prematurely

[carlossanlop]

cc @wtgodbe - I am unsure if this should be considered an arcade failure. Opening it as an aspnetcore failure first.
Note: I enabled BuildRetry.

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=932755&view=logs&j=609589e2-4f74-5576-cdb7-914bcaea778b
Build error leg or test failing: VMR Source-Only Build / CentOSStream9_Online_MsftSdk_x64 / Build
Pull request: #46380

Error Message

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

{
  "ErrorMessage": "Child node "7" exited prematurely. Shutting down",
  "ErrorPattern": "",
  "BuildRetry": true,
  "ExcludeConsoleLog": false
}

• Output:

##[error]Child node "7" exited prematurely. Shutting down. Diagnostic information may be found in files in "/__w/1/vmr/src/aspnetcore/artifacts/log/Release" and will be named MSBuild_*.failure.txt. This location can be changed by setting the MSBUILDDEBUGPATH environment variable to a different directory.
    /__w/1/vmr/.dotnet/sdk/10.0.100-alpha.1.25073.21/Roslyn/Microsoft.CSharp.Core.targets(84,5): warning MSB5021: Terminating the task executable "dotnet" and its child processes because the build was canceled. [/__w/1/vmr/src/aspnetcore/src/Servers/Kestrel/Transport.NamedPipes/src/Microsoft.AspNetCore.Server.Kestrel.Transport.NamedPipes.csproj]
##[warning].dotnet/sdk/10.0.100-alpha.1.25073.21/Roslyn/Microsoft.CSharp.Core.targets(84,5): warning MSB5021: (NETCORE_ENGINEERING_TELEMETRY=Build) Terminating the task executable "dotnet" and its child processes because the build was canceled.

Report

Summary

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

[wtgodbe]

I checked out the binlog & it doesn't have anything beyond what you reported in the issue - I think we'd need the MSBuild_*.failure.txt (mentioned in the error message) to figure out what's going on, which I didn't see in the build artifacts