Assertion failed in Task.UnsafeSetContinuationForAwait

[jkotas]

Discovering: System.Diagnostics.Tracing.Tests (method display = ClassAndMethod, method display options = None)
 Discovered: System.Diagnostics.Tracing.Tests (found 34 of 37 test cases)
 Starting: System.Diagnostics.Tracing.Tests (parallel test collections = on, max threads = 2)
Process terminated. Assertion failed.
 at System.Threading.Tasks.Task.UnsafeSetContinuationForAwait(IAsyncStateMachineBox stateMachineBox, Boolean continueOnCapturedContext) in /_/src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:line 2550
 at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AwaitUnsafeOnCompleted[TAwaiter](TAwaiter& awaiter, IAsyncStateMachineBox box) in /_/src/libraries/System.Private.CoreLib/src/System/Runtime/CompilerServices/AsyncTaskMethodBuilderT.cs:line 107
 at Xunit.Sdk.TestCollectionRunner`1.RunTestClassesAsync() in /_/src/xunit.execution/Sdk/Frameworks/Runners/TestCollectionRunner.cs:line 130
 at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine) in /_/src/libraries/System.Private.CoreLib/src/System/Runtime/CompilerServices/AsyncMethodBuilderCore.cs:line 38
 at Xunit.Sdk.TestCollectionRunner`1.RunTestClassesAsync()
 at Xunit.Sdk.TestCollectionRunner`1.RunAsync() in /_/src/xunit.execution/Sdk/Frameworks/Runners/TestCollectionRunner.cs:line 101
 at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine) in /_/src/libraries/System.Private.CoreLib/src/System/Runtime/CompilerServices/AsyncMethodBuilderCore.cs:line 38
 at Xunit.Sdk.TestCollectionRunner`1.RunAsync()
 at Xunit.Sdk.XunitTestAssemblyRunner.RunTestCollectionAsync(IMessageBus messageBus, ITestCollection testCollection, IEnumerable`1 testCases, CancellationTokenSource cancellationTokenSource) in /_/src/xunit.execution/Sdk/Frameworks/Runners/XunitTestAssemblyRunner.cs:line 235
 at Xunit.Sdk.TestAssemblyRunner`1.RunTestCollectionsAsync(IMessageBus messageBus, CancellationTokenSource cancellationTokenSource) in /_/src/xunit.execution/Sdk/Frameworks/Runners/TestAssemblyRunner.cs:line 231
 at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine) in /_/src/libraries/System.Private.CoreLib/src/System/Runtime/CompilerServices/AsyncMethodBuilderCore.cs:line 38
 at Xunit.Sdk.TestAssemblyRunner`1.RunTestCollectionsAsync(IMessageBus messageBus, CancellationTokenSource cancellationTokenSource)
 at Xunit.Sdk.XunitTestAssemblyRunner.<>n__0(IMessageBus messageBus, CancellationTokenSource cancellationTokenSource)
 at Xunit.Sdk.XunitTestAssemblyRunner.RunTestCollectionsAsync(IMessageBus messageBus, CancellationTokenSource cancellationTokenSource) in /_/src/xunit.execution/Sdk/Frameworks/Runners/XunitTestAssemblyRunner.cs:line 165
 at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine) in /_/src/libraries/System.Private.CoreLib/src/System/Runtime/CompilerServices/AsyncMethodBuilderCore.cs:line 38
 at Xunit.Sdk.XunitTestAssemblyRunner.RunTestCollectionsAsync(IMessageBus messageBus, CancellationTokenSource cancellationTokenSource)
 at Xunit.Sdk.TestAssemblyRunner`1.RunAsync() in /_/src/xunit.execution/Sdk/Frameworks/Runners/TestAssemblyRunner.cs:line 196
 at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine) in /_/src/libraries/System.Private.CoreLib/src/System/Runtime/CompilerServices/AsyncMethodBuilderCore.cs:line 38
 at Xunit.Sdk.TestAssemblyRunner`1.RunAsync()
 at Xunit.Sdk.XunitTestFrameworkExecutor.RunTestCases(IEnumerable`1 testCases, IMessageSink executionMessageSink, ITestFrameworkExecutionOptions executionOptions) in /_/src/xunit.execution/Sdk/Frameworks/XunitTestFrameworkExecutor.cs:line 95
 at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine) in /_/src/libraries/System.Private.CoreLib/src/System/Runtime/CompilerServices/AsyncMethodBuilderCore.cs:line 38
 at Xunit.Sdk.XunitTestFrameworkExecutor.RunTestCases(IEnumerable`1 testCases, IMessageSink executionMessageSink, ITestFrameworkExecutionOptions executionOptions)
 at Xunit.Sdk.TestFrameworkExecutor`1.RunTests(IEnumerable`1 testCases, IMessageSink executionMessageSink, ITestFrameworkExecutionOptions executionOptions) in /_/src/xunit.execution/Sdk/Frameworks/TestFrameworkExecutor.cs:line 100
 at Xunit.Xunit2.RunTests(IEnumerable`1 testCases, IMessageSink messageSink, ITestFrameworkExecutionOptions executionOptions) in /_/src/xunit.runner.utility/Frameworks/v2/Xunit2.cs:line 110
 at Xunit.ConsoleClient.ConsoleRunner.ExecuteAssembly(Object consoleLock, XunitProjectAssembly assembly, Boolean serialize, Boolean needsXml, Nullable`1 parallelizeTestCollections, Nullable`1 maxThreadCount, Boolean diagnosticMessages, Boolean noColor, Nullable`1 appDomains, Boolean failSkips, Boolean stopOnFail, XunitFilters filters, Boolean internalDiagnosticMessages) in /_/src/Microsoft.DotNet.XUnitConsoleRunner/src/ConsoleRunner.cs:line 396
 at Xunit.ConsoleClient.ConsoleRunner.RunProject(XunitProject project, Boolean serialize, Nullable`1 parallelizeAssemblies, Nullable`1 parallelizeTestCollections, Nullable`1 maxThreadCount, Boolean diagnosticMessages, Boolean noColor, Nullable`1 appDomains, Boolean failSkips, Boolean stopOnFail, Boolean internalDiagnosticMessages) in /_/src/Microsoft.DotNet.XUnitConsoleRunner/src/ConsoleRunner.cs:line 293
 at Xunit.ConsoleClient.ConsoleRunner.EntryPoint(String[] args) in /_/src/Microsoft.DotNet.XUnitConsoleRunner/src/ConsoleRunner.cs:line 81
 at Xunit.ConsoleClient.Program.Main(String[] args) in /_/src/Microsoft.DotNet.XUnitConsoleRunner/src/Program.cs:line 16

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=277923
Build error leg or test failing: System.Diagnostics.Tracing.Tests.WorkItemExecution
Pull request: #86427

Error Message

Fill the error message using known issues guidance.

{
 "ErrorMessage": "at System.Threading.Tasks.Task.UnsafeSetContinuationForAwait",
 "BuildRetry": false,
 "ErrorPattern": "",
 "ExcludeConsoleLog": false
}

Report

Build	Definition	Test	Pull Request
277923	dotnet/runtime	System.Diagnostics.Tracing.Tests.WorkItemExecution	#86427

Summary

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

[stephentoub]

Seems I knew this day would come 😄

runtime/src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs

Lines 2545 to 2550 in aef327f

	// This code path doesn't emit all expected TPL-related events, such as for continuations.
	// It's expected that all callers check whether events are enabled before calling this function,
	// and only call it if they're not, so we assert. However, as events can be dynamically turned
	// on and off, it's possible this assert could fire even when used correctly. If it becomes
	// noisy, it can be deleted.
	Debug.Assert(!TplEventSource.Log.IsEnabled());