AsyncProfilerTests fail with "Collection was empty"

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Issue 类型
缺陷
描述清晰度
基本清楚
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技术栈
csharp
领域
backend, testing

调研方向

Start with the failing test AsyncProfilerTests.StateMachineAsync_CallstackFramesHaveDistinctMethodIds in src/libraries/System.Runtime/tests/System.Threading.Tasks.Tests/System.Runtime.CompilerServices/AsyncProfilerV1Tests.cs and inspect the async event dump in the issue. The failure is in the assertion that the call stack frames are nonempty. Check the linked build and pull request #137008 for the failure context; done means the test passes with distinct method IDs in the collected frames.

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描述

area-Diagnostics-coreclr blocking-clean-ci Known Build Error untriaged 
    System.Threading.Tasks.Tests.AsyncProfilerTests.StateMachineAsync_CallstackFramesHaveDistinctMethodIds [FAIL]
      Assert.NotEmpty() Failure: Collection was empty
      ----- BEGIN ASYNC EVENTS (CSV) -----
      seq,delta,thread,event,disp,parent,frames,unwind
      0,0,980,AsyncProfilerMetadata,0,0,0,0
      1,240,980,ResetAsyncThreadContext,0,0,0,0
      2,606,980,CreateStateMachineAsyncContext,26,0,0,0
      3,1721266,1480,ResetAsyncThreadContext,0,0,0,0
      4,1721273,1480,ResumeStateMachineAsyncContext,26,0,0,0
      5,1721274,1480,ResumeStateMachineAsyncCallstack,26,0,2,0
      6,1748856,1480,CompleteStateMachineAsyncContext,26,0,0,0
      ----- END ASYNC EVENTS -----
      Stack Trace:
        /_/src/libraries/System.Runtime/tests/System.Threading.Tasks.Tests/System.Runtime.CompilerServices/AsyncProfilerTests.cs(1860,0): at System.Threading.Tasks.Tests.AsyncProfilerTests.Wrap(EventDump dump, Action assert)
        /_/src/libraries/System.Runtime/tests/System.Threading.Tasks.Tests/System.Runtime.CompilerServices/AsyncProfilerTests.cs(1868,0): at System.Threading.Tasks.Tests.AsyncProfilerTests.AssertNotEmpty[T](EventDump dump, IEnumerable`1 collection)
        /_/src/libraries/System.Runtime/tests/System.Threading.Tasks.Tests/System.Runtime.CompilerServices/AsyncProfilerV1Tests.cs(804,0): at System.Threading.Tasks.Tests.AsyncProfilerTests.StateMachineAsync_CallstackFramesHaveDistinctMethodIds()

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1665581
Build error leg or test failing: System.Threading.Tasks.Tests.AsyncProfilerTests.StateMachineAsync_CallstackFramesHaveDistinctMethodIds
Pull request: https://github.com/dotnet/runtime/pull/137008

Error Message

DO NOT USE JSON BELOW IF THIS IS A BUILD BREAK otherwise build analysis will allow pull requests to merge that break the build worse. For a build break, do not use this issue form. Make a regular new issue.

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

{
  "ErrorMessage": "",
  "ErrorPattern": ["System.Threading.Tasks.Tests.AsyncProfilerTests.*FAIL","Failure: Collection was empty"],
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}
Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1665581
Error message validated: [System.Threading.Tasks.Tests.AsyncProfilerTests.*FAIL Failure: Collection was empty]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 11/6/2026 3:11:44 PM UTC

Report
Build Repository Test Pull Request
1665581 dotnet/runtime System.Threading.Tasks.Tests.AsyncProfilerTests.StateMachineAsync_CallstackFramesHaveDistinctMethodIds dotnet/runtime#137008
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