Stack overflow in `DecisionDagBuilder+Tests+SequenceTests.Filter`

[jjonescz]

Version Used: .NET 10 RC1. VSCode with ms-dotnettools.csharp-2.93.21-win32-x64.

Steps to Reproduce:

1. Open this file in VSCode: error-code-switch.zip (can also repro in VS 18.0.0 Insiders [11104.47.d18.0] when opening that file as part of a simple console project).
2. Wait a while for language services to load.

Note: that file is manually crafted to help observe the stack overflow more reliably, but I saw it originally in a "real-world" code - specifically when having b8df615 checked out and opening ErrorFacts.cs in VSCode (there is the very long switch expression).

Expected Behavior: Works.

Actual Behavior: Crashes with stack overflow.

This is output from C# extension log:

2025-10-06 13:37:45.212 [error] [stderr] Stack overflow.

2025-10-06 13:37:45.214 [error] [stderr] Repeated 2460 times:
--------------------------------

2025-10-06 13:37:45.214 [error] [stderr]    at Microsoft.CodeAnalysis.CSharp.DecisionDagBuilder+Tests+SequenceTests.Filter(Microsoft.CodeAnalysis.CSharp.DecisionDagBuilder, Microsoft.CodeAnalysis.CSharp.BoundDagTest, DagState, Microsoft.CodeAnalysis.CSharp.IValueSet, Microsoft.CodeAnalysis.CSharp.IValueSet, Tests ByRef, Tests ByRef, Boolean ByRef)
--------------------------------
   at Microsoft.CodeAnalysis.CSharp.DecisionDagBuilder.SplitCases(DagState, Microsoft.CodeAnalysis.CSharp.BoundDagTest, FrozenArrayBuilder`1<StateForCase> ByRef, System.Collections.Immutable.ImmutableDictionary`2<Microsoft.CodeAnalysis.CSharp.BoundDagTemp,Microsoft.CodeAnalysis.CSharp.IValueSet> ByRef, FrozenArrayBuilder`1<StateForCase> ByRef, System.Collections.Immutable.ImmutableDictionary`2<Microsoft.CodeAnalysis.CSharp.BoundDagTemp,Microsoft.CodeAnalysis.CSharp.IValueSet> ByRef, Boolean ByRef)
   at Microsoft.CodeAnalysis.CSharp.DecisionDagBuilder.MakeDecisionDag(Microsoft.CodeAnalysis.Collections.TemporaryArray`1<StateForCase> ByRef, System.Collections.Generic.Dictionary`2<DagState,DagState>)
   at Microsoft.CodeAnalysis.CSharp.DecisionDagBuilder.MakeBoundDecisionDag(Microsoft.CodeAnalysis.SyntaxNode, Microsoft.CodeAnalysis.Collections.TemporaryArray`1<StateForCase> ByRef)
   at Microsoft.CodeAnalysis.CSharp.DecisionDagBuilder.CreateDecisionDagForSwitchExpression(Microsoft.CodeAnalysis.SyntaxNode, Microsoft.CodeAnalysis.CSharp.BoundExpression, System.Collections.Immutable.ImmutableArray`1<Microsoft.CodeAnalysis.CSharp.BoundSwitchExpressionArm>)
   at Microsoft.CodeAnalysis.CSharp.SwitchExpressionBinder.CheckSwitchExpressionExhaustive(Microsoft.CodeAnalysis.CSharp.Syntax.SwitchExpressionSyntax, Microsoft.CodeAnalysis.CSharp.BoundExpression, System.Collections.Immutable.ImmutableArray`1<Microsoft.CodeAnalysis.CSharp.BoundSwitchExpressionArm>, Microsoft.CodeAnalysis.CSharp.BoundDecisionDag ByRef, Microsoft.CodeAnalysis.CSharp.Symbols.LabelSymbol ByRef, Microsoft.CodeAnalysis.CSharp.BindingDiagnosticBag)
   at Microsoft.CodeAnalysis.CSharp.SwitchExpressionBinder.BindSwitchExpressionCore(Microsoft.CodeAnalysis.CSharp.Syntax.SwitchExpressionSyntax, Microsoft.CodeAnalysis.CSharp.Binder, Microsoft.CodeAnalysis.CSharp.BindingDiagnosticBag)
   at Microsoft.CodeAnalysis.CSharp.Binder.BindSwitchExpression(Microsoft.CodeAnalysis.CSharp.Syntax.SwitchExpressionSyntax, Microsoft.CodeAnalysis.CSharp.BindingDiagnosticBag)
   at Microsoft.CodeAnalysis.CSharp.Binder.BindExpressionInternal(Microsoft.CodeAnalysis.CSharp.Syntax.ExpressionSyntax, Microsoft.CodeAnalysis.CSharp.BindingDiagnosticBag, Boolean, Boolean)
   at Microsoft.CodeAnalysis.CSharp.Binder.BindReturn(Microsoft.CodeAnalysis.CSharp.Syntax.ReturnStatementSyntax, Microsoft.CodeAnalysis.CSharp.BindingDiagnosticBag)

2025-10-06 13:37:45.214 [error] [stderr]    at Microsoft.CodeAnalysis.CSharp.Binder.BindStatement(Microsoft.CodeAnalysis.CSharp.Syntax.StatementSyntax, Microsoft.CodeAnalysis.CSharp.BindingDiagnosticBag)
   at Microsoft.CodeAnalysis.CSharp.CSharpSemanticModel.Bind(Microsoft.CodeAnalysis.CSharp.Binder, Microsoft.CodeAnalysis.CSharp.CSharpSyntaxNode, Microsoft.CodeAnalysis.CSharp.BindingDiagnosticBag)
   at Microsoft.CodeAnalysis.CSharp.MemberSemanticModel.GetBoundNodes(Microsoft.CodeAnalysis.CSharp.CSharpSyntaxNode)
   at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.GetSymbolInfoWorker(Microsoft.CodeAnalysis.CSharp.CSharpSyntaxNode, SymbolInfoOptions, System.Threading.CancellationToken)
   at Microsoft.CodeAnalysis.CSharp.CSharpSemanticModel.GetSymbolInfo(Microsoft.CodeAnalysis.CSharp.Syntax.ExpressionSyntax, System.Threading.CancellationToken)
   at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService+Worker.ClassifyNode(Microsoft.CodeAnalysis.SyntaxNode)
   at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService+Worker.Classify(Microsoft.CodeAnalysis.SemanticModel, System.Collections.Immutable.ImmutableArray`1<Microsoft.CodeAnalysis.Text.TextSpan>, Microsoft.CodeAnalysis.Collections.SegmentedList`1<Microsoft.CodeAnalysis.Classification.ClassifiedSpan>, System.Func`2<Microsoft.CodeAnalysis.SyntaxNode,System.Collections.Immutable.ImmutableArray`1<Microsoft.CodeAnalysis.Classification.Classifiers.ISyntaxClassifier>>, System.Func`2<Microsoft.CodeAnalysis.SyntaxToken,System.Collections.Immutable.ImmutableArray`1<Microsoft.CodeAnalysis.Classification.Classifiers.ISyntaxClassifier>>, Microsoft.CodeAnalysis.Classification.ClassificationOptions, System.Threading.CancellationToken)
   at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService+<AddSemanticClassificationsAsync>d__5.MoveNext()
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService+<AddSemanticClassificationsAsync>d__5, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].ExecutionContextCallback(System.Object)
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService+<AddSemanticClassificationsAsync>d__5, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext(System.Threading.Thread)

2025-10-06 13:37:45.215 [error] [stderr]    at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService+<AddSemanticClassificationsAsync>d__5, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Runtime.CompilerServices.IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(System.Object)
   at Microsoft.CodeAnalysis.Document+<GetRequiredNullableDisabledSemanticModelAsync>d__26.MoveNext()
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Document+<GetRequiredNullableDisabledSemanticModelAsync>d__26, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].ExecutionContextCallback(System.Object)
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Document+<GetRequiredNullableDisabledSemanticModelAsync>d__26, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext(System.Threading.Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Document+<GetRequiredNullableDisabledSemanticModelAsync>d__26, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Runtime.CompilerServices.IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(System.Object)
   at Microsoft.CodeAnalysis.Document+<GetSemanticModelAsync>d__25.MoveNext()
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Document+<GetSemanticModelAsync>d__25, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].ExecutionContextCallback(System.Object)
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Document+<GetSemanticModelAsync>d__25, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext(System.Threading.Thread)
2025-10-06 13:37:45.215 [error] [stderr] 
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Document+<GetSemanticModelAsync>d__25, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Runtime.CompilerServices.IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(System.Object)
   at Microsoft.CodeAnalysis.Document+<GetSemanticModelHelperAsync>d__28.MoveNext()
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Document+<GetSemanticModelHelperAsync>d__28, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].ExecutionContextCallback(System.Object)
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Document+<GetSemanticModelHelperAsync>d__28, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext(System.Threading.Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Document+<GetSemanticModelHelperAsync>d__28, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Runtime.CompilerServices.IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(System.Object)
   at System.Threading.Tasks.Task`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].TrySetResult(System.__Canon)
   at Microsoft.CodeAnalysis.Document+<>c__DisplayClass28_0+<<GetSemanticModelHelperAsync>g__GetSemanticModelWorkerAsync|0>d.MoveNext()
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Document+<>c__DisplayClass28_0+<<GetSemanticModelHelperAsync>g__GetSemanticModelWorkerAsync|0>d, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].ExecutionContextCallback(System.Object)
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Document+<>c__DisplayClass28_0+<<GetSemanticModelHelperAsync>g__GetSemanticModelWorkerAsync|0>d, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext(System.Threading.Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Document+<>c__DisplayClass28_0+<<GetSemanticModelHelperAsync>g__GetSemanticModelWorkerAsync|0>d, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Runtime.CompilerServices.IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(System.Object)
2025-10-06 13:37:45.215 [error] [stderr] 
   at Microsoft.CodeAnalysis.Shared.Extensions.ProjectExtensions+<GetRequiredCompilationAsync>d__18.MoveNext()
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Shared.Extensions.ProjectExtensions+<GetRequiredCompilationAsync>d__18, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].ExecutionContextCallback(System.Object)
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Shared.Extensions.ProjectExtensions+<GetRequiredCompilationAsync>d__18, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext(System.Threading.Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Shared.Extensions.ProjectExtensions+<GetRequiredCompilationAsync>d__18, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Runtime.CompilerServices.IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(System.Object)
   at Microsoft.CodeAnalysis.SolutionCompilationState+RegularCompilationTracker+<GetCompilationSlowAsync>d__24.MoveNext()
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.SolutionCompilationState+RegularCompilationTracker+<GetCompilationSlowAsync>d__24, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].ExecutionContextCallback(System.Object)
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.SolutionCompilationState+RegularCompilationTracker+<GetCompilationSlowAsync>d__24, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext(System.Threading.Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.SolutionCompilationState+RegularCompilationTracker+<GetCompilationSlowAsync>d__24, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Runtime.CompilerServices.IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(System.Object)
   at System.Threading.Tasks.Task`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].TrySetResult(System.__Canon)
   at Microsoft.CodeAnalysis.SolutionCompilationState+RegularCompilationTracker+<GetOrBuildFinalStateAsync>d__25.MoveNext()
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.SolutionCompilationState+RegularCompilationTracker+<GetOrBuildFinalStateAsync>d__25, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].ExecutionContextCallback(System.Object)
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.SolutionCompilationState+RegularCompilationTracker+<GetOrBuildFinalStateAsync>d__25, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext(System.Threading.Thread)

2025-10-06 13:37:45.215 [error] [stderr]    at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.SolutionCompilationState+RegularCompilationTracker+<GetOrBuildFinalStateAsync>d__25, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Runtime.CompilerServices.IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(System.Object)
   at Microsoft.CodeAnalysis.SolutionCompilationState+RegularCompilationTracker+<>c__DisplayClass25_0+<<GetOrBuildFinalStateAsync>g__BuildFinalStateAsync|0>d.MoveNext()
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.SolutionCompilationState+RegularCompilationTracker+<>c__DisplayClass25_0+<<GetOrBuildFinalStateAsync>g__BuildFinalStateAsync|0>d, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].ExecutionContextCallback(System.Object)
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.SolutionCompilationState+RegularCompilationTracker+<>c__DisplayClass25_0+<<GetOrBuildFinalStateAsync>g__BuildFinalStateAsync|0>d, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext(System.Threading.Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.SolutionCompilationState+RegularCompilationTracker+<>c__DisplayClass25_0+<<GetOrBuildFinalStateAsync>g__BuildFinalStateAsync|0>d, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Runtime.CompilerServices.IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(System.Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].SetExistingTaskResult(System.Threading.Tasks.Task`1<System.__Canon>, System.__Canon)
   at Microsoft.CodeAnalysis.SolutionCompilationState+RegularCompilationTracker+<>c__DisplayClass25_0+<<GetOrBuildFinalStateAsync>g__CollapseInProgressStateAsync|2>d.MoveNext()
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.SolutionCompilationState+RegularCompilationTracker+<>c__DisplayClass25_0+<<GetOrBuildFinalStateAsync>g__CollapseInProgressStateAsync|2>d, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext(System.Threading.Thread)
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Runtime.CompilerServices.IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(System.Object)
   at Microsoft.CodeAnalysis.SolutionCompilationState+RegularCompilationTracker+<>c__DisplayClass25_0+<<GetOrBuildFinalStateAsync>g__ApplyFirstTransformationAsync|6>d.MoveNext()
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.ValueTuple`3[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.SolutionCompilationState+RegularCompilationTracker+CompilationTrackerGeneratorInfo, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.SolutionCompilationState+RegularCompilationTracker+<>c__DisplayClass25_0+<<GetOrBuildFinalStateAsync>g__ApplyFirstTransformationAsync|6>d, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext(System.Threading.Thread)

2025-10-06 13:37:45.216 [error] [stderr]    at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Runtime.CompilerServices.IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(System.Object)
   at System.Threading.Tasks.Task`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].TrySetResult(System.__Canon)
   at Microsoft.CodeAnalysis.SolutionCompilationState+TranslationAction+AddDocumentsAction+<TransformCompilationAsync>d__3.MoveNext()
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.SolutionCompilationState+TranslationAction+AddDocumentsAction+<TransformCompilationAsync>d__3, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext(System.Threading.Thread)
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Runtime.CompilerServices.IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(System.Object)
   at Microsoft.CodeAnalysis.Threading.ProducerConsumer`1+<RunParallelAsync>d__10`2[[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Threading.VoidResult, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext()
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.Collections.Immutable.ImmutableArray`1[[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Collections.Immutable, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a],[Microsoft.CodeAnalysis.Threading.ProducerConsumer`1+<RunParallelAsync>d__10`2[[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Threading.VoidResult, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]], Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext(System.Threading.Thread)
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Runtime.CompilerServices.IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(System.Object)
   at Microsoft.CodeAnalysis.Threading.ProducerConsumer`1+<RunChannelAsync>d__14`2[[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.ValueTuple`4[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.ValueTuple`3[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Threading.VoidResult, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.Collections.Immutable.ImmutableArray`1[[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Collections.Immutable, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].MoveNext()
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)

2025-10-06 13:37:45.216 [error] [stderr]    at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.Collections.Immutable.ImmutableArray`1[[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Collections.Immutable, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a],[Microsoft.CodeAnalysis.Threading.ProducerConsumer`1+<RunChannelAsync>d__14`2[[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.ValueTuple`4[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.ValueTuple`3[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Threading.VoidResult, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.Collections.Immutable.ImmutableArray`1[[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Collections.Immutable, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]], Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext(System.Threading.Thread)
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Runtime.CompilerServices.IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(System.Object)
   at System.Threading.Tasks.Task+WhenAllPromise.Invoke(System.Threading.Tasks.Task)
   at System.Threading.Tasks.Task.RunContinuations(System.Object)
   at Microsoft.CodeAnalysis.Threading.ProducerConsumer`1+<>c__DisplayClass14_0`2+<<RunChannelAsync>g__ReadFromChannelAndConsumeItemsAsync|1>d[[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.ValueTuple`4[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.ValueTuple`3[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Threading.VoidResult, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.Collections.Immutable.ImmutableArray`1[[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Collections.Immutable, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].MoveNext()
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.Collections.Immutable.ImmutableArray`1[[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Collections.Immutable, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a],[Microsoft.CodeAnalysis.Threading.ProducerConsumer`1+<>c__DisplayClass14_0`2+<<RunChannelAsync>g__ReadFromChannelAndConsumeItemsAsync|1>d[[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.ValueTuple`4[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.ValueTuple`3[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[Microsoft.CodeAnalysis.Threading.VoidResult, Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.Collections.Immutable.ImmutableArray`1[[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Collections.Immutable, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]], Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext(System.Threading.Thread)
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Runtime.CompilerServices.IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(System.Object)

2025-10-06 13:37:45.216 [error] [stderr]    at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1[[System.Collections.Immutable.ImmutableArray`1[[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Collections.Immutable, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].SetExistingTaskResult(System.Threading.Tasks.Task`1<System.Collections.Immutable.ImmutableArray`1<System.ValueTuple`2<System.__Canon,System.__Canon>>>, System.Collections.Immutable.ImmutableArray`1<System.ValueTuple`2<System.__Canon,System.__Canon>>)
   at Microsoft.CodeAnalysis.IAsyncEnumerableExtensions+<ToImmutableArrayAsync>d__0`1[[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].MoveNext()
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)

2025-10-06 13:37:45.217 [error] [stderr]    at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.Collections.Immutable.ImmutableArray`1[[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Collections.Immutable, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a],[Microsoft.CodeAnalysis.IAsyncEnumerableExtensions+<ToImmutableArrayAsync>d__0`1[[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], Microsoft.CodeAnalysis.Workspaces, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]].MoveNext(System.Threading.Thread)
   at System.Threading.Channels.ChannelReader`1+<ReadAllAsync>d__12[[System.ValueTuple`2[[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].MoveNext()
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1+AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].MoveNext(System.Threading.Thread)
   at System.Threading.ThreadPoolWorkQueue.Dispatch()
   at System.Threading.PortableThreadPool+WorkerThread.WorkerThreadStart()

[jjonescz]

Similar to #73457.

[AlekseyTs]

I am not sure how to interpret the C# extension log. While debugging the scenario, I do not see any direct or indirect recursion in Microsoft.CodeAnalysis.CSharp.DecisionDagBuilder.Tests.SequenceTests.Filter(Microsoft.CodeAnalysis.CSharp.DecisionDagBuilder builder, Microsoft.CodeAnalysis.CSharp.BoundDagTest test, Microsoft.CodeAnalysis.CSharp.DecisionDagBuilder.DagState state, Microsoft.CodeAnalysis.CSharp.IValueSet whenTrueValues, Microsoft.CodeAnalysis.CSharp.IValueSet whenFalseValues, out Microsoft.CodeAnalysis.CSharp.DecisionDagBuilder.Tests whenTrue, out Microsoft.CodeAnalysis.CSharp.DecisionDagBuilder.Tests whenFalse, ref bool foundExplicitNullTest)

I did find some recursion in PatternExplainer.VisitPathsToNode, but to get a stack overflow in context of a unit-test, the pattern needed to include more than 20000 'or's.

[RikkiGibson]

It seems like recursion could occur in this scenario via other.Filter(), is that not actually the case?

roslyn/src/Compilers/CSharp/Portable/Binder/DecisionDagBuilder.cs

Lines 2328 to 2349 in 47d179f

	public sealed override void Filter(
	DecisionDagBuilder builder,
	BoundDagTest test,
	DagState state,
	IValueSet? whenTrueValues,
	IValueSet? whenFalseValues,
	out Tests whenTrue,
	out Tests whenFalse,
	ref bool foundExplicitNullTest)
	{
	var trueBuilder = ArrayBuilder<Tests>.GetInstance(RemainingTests.Length);
	var falseBuilder = ArrayBuilder<Tests>.GetInstance(RemainingTests.Length);
	foreach (var other in RemainingTests)
	{
	other.Filter(builder, test, state, whenTrueValues, whenFalseValues, out Tests oneTrue, out Tests oneFalse, ref foundExplicitNullTest);
	trueBuilder.Add(oneTrue);
	falseBuilder.Add(oneFalse);
	}
	whenTrue = Update(trueBuilder);
	whenFalse = Update(falseBuilder);
	}

[jjonescz]

As Rikki says, it seemed that the stack overflow happens via other.Filter.

Unfortunately I'm having trouble repro'ing the original issue now as I'm getting another stack overflow:

2025-10-13 14:20:22.064 [error] [stderr] Repeated 1775 times:
--------------------------------
   at Microsoft.CodeAnalysis.Features.EmbeddedLanguages.Json.LanguageServices.AbstractJsonDiagnosticAnalyzer.Analyze(Microsoft.CodeAnalysis.Diagnostics.SemanticModelAnalysisContext, Microsoft.CodeAnalysis.Features.EmbeddedLanguages.Json.LanguageServices.JsonLanguageDetector, Microsoft.CodeAnalysis.SyntaxNode, System.Threading.CancellationToken)
--------------------------------
   at Microsoft.CodeAnalysis.Features.EmbeddedLanguages.Json.LanguageServices.AbstractJsonDiagnosticAnalyzer.Analyze(Microsoft.CodeAnalysis.Diagnostics.SemanticModelAnalysisContext)

[CyrusNajmabadi]

Will work on that.

[jjonescz]

When locally building Cyrus's fix and using it in vscode (via "dotnet.server.path"), I can no longer repro the original stack overflow 🤷 So feel free to close this (I can open a new issue with more details if I encounter this again).

[AlekseyTs]

@CyrusNajmabadi It looks like even with the fix, RoslynDeployment is crashing with the repro.