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AF: The continuation was the completion sentinel. #127234

@jkotas

Description

@jkotas
The continuation was the completion sentinel.
   at System.Threading.Channels.AsyncOperation.SignalCompletion() in /_/src/libraries/System.Threading.Channels/src/System/Threading/Channels/AsyncOperation.cs:line 212
   at System.Threading.Channels.AsyncOperation.TrySetException(Exception exception) in /_/src/libraries/System.Threading.Channels/src/System/Threading/Channels/AsyncOperation.cs:line 152
   at System.Threading.Channels.ChannelUtilities.FailOperations[TAsyncOp](TAsyncOp head, Exception error) in /_/src/libraries/System.Threading.Channels/src/System/Threading/Channels/ChannelUtilities.cs:line 308
   at System.Threading.Channels.RendezvousChannel`1.RendezvousChannelWriter.TryComplete(Exception error) in /_/src/libraries/System.Threading.Channels/src/System/Threading/Channels/RendezvousChannel.cs:line 295

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1389277
Build error leg or test failing: System.Diagnostics.Process.Tests.WorkItemExecution
Pull request: #127206

Error Message

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

{
  "ErrorMessage": "The continuation was the completion sentinel.",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1389277
Error message validated: [The continuation was the completion sentinel.]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 4/21/2026 6:17:39 PM UTC

Report

Build Definition Test Pull Request
1389277 dotnet/runtime System.Diagnostics.Process.Tests.WorkItemExecution #127206

Summary

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

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