System.Threading.Tasks.Tests.AsyncProfilerTests.StateMachineAsync_CallstackStressWithVaryingDepths test failure

[jkotas]

    System.Threading.Tasks.Tests.AsyncProfilerTests.StateMachineAsync_CallstackStressWithVaryingDepths [FAIL]
      Expected at least 3 buffer flushes, got 2

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1480502
Build error leg or test failing: System.Threading.Tasks.Tests.AsyncProfilerTests.StateMachineAsync_CallstackStressWithVaryingDepths
Pull request: #129773

Error Message

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

{
  "ErrorMessage": "System.Threading.Tasks.Tests.AsyncProfilerTests.StateMachineAsync_CallstackStressWithVaryingDepths [FAIL]",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1480502
Error message validated: [System.Threading.Tasks.Tests.AsyncProfilerTests.StateMachineAsync_CallstackStressWithVaryingDepths [FAIL]]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 6/25/2026 9:14:22 PM UTC

Report

Build	Repository	Test	Pull Request
1482524	dotnet/runtime	System.Threading.Tasks.Tests.AsyncProfilerTests.StateMachineAsync_CallstackStressWithVaryingDepths
1482004	dotnet/runtime	System.Threading.Tasks.Tests.AsyncProfilerTests.StateMachineAsync_CallstackStressWithVaryingDepths	#129828
1482051	dotnet/runtime	System.Threading.Tasks.Tests.AsyncProfilerTests.StateMachineAsync_CallstackStressWithVaryingDepths	#129612
1481686	dotnet/runtime	System.Threading.Tasks.Tests.AsyncProfilerTests.StateMachineAsync_CallstackStressWithVaryingDepths	#129830
1480502	dotnet/runtime	System.Threading.Tasks.Tests.AsyncProfilerTests.StateMachineAsync_CallstackStressWithVaryingDepths	#129773

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
3	5	5

[jkotas]

cc @lateralusX

[dotnet-policy-service]

Tagging subscribers to this area: @steveisok, @tommcdon, @dotnet/dotnet-diag
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[VincentBu]

Failed in: runtime-coreclr libraries-jitstress 20260625.1

Failed tests:

net11.0-windows-Release-x64-no_tiered_compilation-Windows.10.Amd64.Open
- System.Threading.Tasks.Tests.AsyncProfilerTests.StateMachineAsync_CallstackStressWithVaryingDepths

Error message:

Expected at least 3 buffer flushes, got 2

----- BEGIN ASYNC EVENTS (CSV) -----

seq,delta,thread,event,disp,parent,frames,unwind

0,0,5368,AsyncProfilerMetadata,0,0,0,0

1,233,5368,ResetAsyncThreadContext,0,0,0,0

2,239,5368,CreateStateMachineAsyncContext,372,0,0,0

3,983976,5368,ResumeStateMachineAsyncContext,372,0,0,0

4,983977,5368,ResumeStateMachineAsyncCallstack,372,0,41,0

5,1193900,5368,CreateStateMachineAsyncContext,374,373,0,0

6,1194148,5368,CompleteStateMachineAsyncContext,372,0,0,0

7,2234414,5368,ResumeStateMachineAsyncContext,374,0,0,0

8,2234415,5368,ResumeStateMachineAsyncCallstack,374,0,10,0

9,2236963,5368,CreateStateMachineAsyncContext,375,373,0,0

10,2237166,5368,CompleteStateMachineAsyncContext,374,0,0,0

11,3328517,5368,ResumeStateMachineAsyncContext,375,0,0,0

12,3328518,5368,ResumeStateMachineAsyncCallstack,375,0,9,0

13,3329374,5368,CreateStateMachineAsyncContext,376,373,0,0

14,3329767,5368,CompleteStateMachineAsyncContext,375,0,0,0

15,4424384,5368,ResumeStateMachineAsyncContext,376,0,0,0

16,4424385,5368,ResumeStateMachineAsyncCallstack,376,0,32,0

17,4425157,5368,CreateStateMachineAsyncContext,377,373,0,0

18,4425403,5368,CompleteStateMachineAsyncContext,376,0,0,0

19,5515600,5368,ResumeStateMachineAsyncContext,377,0,0,0

20,5515601,5368,ResumeStateMachineAsyncCallstack,377,0,11,0

21,5516150,5368,CreateStateMachineAsyncContext,378,373,0,0

22,5516433,5368,CompleteStateMachineAsyncContext,377,0,0,0

23,6609567,5368,ResumeStateMachineAsyncContext,378,0,0,0

24,6609568,5368,ResumeStateMachineAsyncCallstack,378,0,17,0

25,6610216,5368,CreateStateMachineAsyncContext,379,373,0,0

26,6611039,5368,CompleteStateMachineAsyncContext,378,0,0,0

27,7703264,5368,ResumeStateMachineAsyncContext,379,0,0,0

28,7703265,5368,ResumeStateMachineAsyncCallstack,379,0,44,0

29,7704130,5368,CreateStateMachineAsyncContext,380,373,0,0

30,7704594,5368,CompleteStateMachineAsyncContext,379,0,0,0

31,8796394,5368,ResumeStateMachineAsyncContext,380,0,0,0

32,8796395,5368,ResumeStateMachineAsyncCallstack,380,0,32,0

33,8797131,5368,CreateStateMachineAsyncContext,381,373,0,0

34,8797381,5368,CompleteStateMachineAsyncContext,380,0,0,0

35,9891060,5368,ResumeStateMachineAsyncContext,381,0,0,0

36,9891061,5368,ResumeStateMachineAsyncCallstack,381,0,12,0

37,9891627,5368,CreateStateMachineAsyncContext,382,373,0,0

38,9892504,5368,CompleteStateMachineAsyncContext,381,0,0,0

39,10986284,5368,ResumeStateMachineAsyncContext,382,0,0,0

40,10986285,5368,ResumeStateMachineAsyncCallstack,382,0,46,0

41,10988795,5368,CreateStateMachineAsyncContext,383,373,0,0

42,10989701,5368,CompleteStateMachineAsyncContext,382,0,0,0

43,12078095,5368,ResumeStateMachineAsyncContext,383,0,0,0

44,12078096,5368,ResumeStateMachineAsyncCallstack,383,0,15,0

45,12078667,5368,CreateStateMachineAsyncContext,384,373,0,0

46,12078942,5368,CompleteStateMachineAsyncContext,383,0,0,0

47,13171596,5368,ResumeStateMachineAsyncContext,384,0,0,0

48,13171597,5368,ResumeStateMachineAsyncCallstack,384,0,17,0

49,13172811,5368,CreateStateMachineAsyncContext,385,373,0,0

50,13173423,5368,CompleteStateMachineAsyncContext,384,0,0,0

51,14265730,5368,ResumeStateMachineAsyncContext,385,0,0,0

52,14265731,5368,ResumeStateMachineAsyncCallstack,385,0,31,0

53,14266406,5368,CreateStateMachineAsyncContext,386,373,0,0

54,14266729,5368,CompleteStateMachineAsyncContext,385,0,0,0

55,15359849,5368,ResumeStateMachineAsyncContext,386,0,0,0

56,15359850,5368,ResumeStateMachineAsyncCallstack,386,0,20,0

57,15360405,5368,CreateStateMachineAsyncContext,387,373,0,0

58,15360682,5368,CompleteStateMachineAsyncContext,386,0,0,0

59,16452518,5368,ResumeStateMachineAsyncContext,387,0,0,0

60,16452519,5368,ResumeStateMachineAsyncCallstack,387,0,24,0

61,16453428,5368,CreateStateMachineAsyncContext,388,373,0,0

62,16453684,5368,CompleteStateMachineAsyncContext,387,0,0,0

63,17546813,5368,ResumeStateMachineAsyncContext,388,0,0,0

64,17546814,5368,ResumeStateMachineAsyncCallstack,388,0,17,0

65,17547608,

Stack trace:

   at System.Threading.Tasks.Tests.AsyncProfilerTests.Wrap(EventDump dump, Action assert) in /_/src/libraries/System.Runtime/tests/System.Threading.Tasks.Tests/System.Runtime.CompilerServices/AsyncProfilerTests.cs:line 1583
   at System.Threading.Tasks.Tests.AsyncProfilerTests.StateMachineAsync_CallstackStressWithVaryingDepths() in /_/src/libraries/System.Runtime/tests/System.Threading.Tasks.Tests/System.Runtime.CompilerServices/AsyncProfilerV1Tests.cs:line 1462
   at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args) in /_/src/coreclr/System.Private.CoreLib/src/System/Reflection/MethodBaseInvoker.CoreCLR.cs:line 37
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr) in /_/src/libraries/System.Private.CoreLib/src/System/Reflection/MethodBaseInvoker.cs:line 57