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Feature 'Semantic classification' is currently unavailable due to an internal error (StreamJsonRpc.RemoteInvocationException: Object reference not set to an instance of an object.) #63567

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twest820 opened this issue Aug 24, 2022 · 9 comments
Closed

Feature 'Semantic classification' is currently unavailable due to an internal error (StreamJsonRpc.RemoteInvocationException: Object reference not set to an instance of an object.) #63567

twest820 opened this issue Aug 24, 2022 · 9 comments
Labels
Area-Analyzers untriaged Issues and PRs which have not yet been triaged by a lead
Milestone
17.4 P1

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@twest820
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twest820 commented Aug 24, 2022 •
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Version Used: Visual Studio 17.3.0 (for a about a week so far)

Steps to Reproduce: Routine C# coding. This popped while I was in the middle of splitting a for loop into two for loops (which may not be relevant at all) and seemed perhaps worth noting. While analyzers going offline due to exceptions isn't uncommon this is the first time I've had this particular analyzer fall over.

Expected Behavior: Semantic classification doesn't render itself unavailable.

Actual Behavior: VS raises yellow bar with message in the title and the stack trace below. Looked around a bit in %AppData%\Microsoft\VisualStudio and didn't see anything which looked like helpful additional information but please let me know if there's a log file I should consult.

StreamJsonRpc.RemoteInvocationException: Object reference not set to an instance of an object.
   at StreamJsonRpc.JsonRpc.<InvokeCoreAsync>d__143`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Threading.Tasks.ValueTask`1.get_Result()
   at Microsoft.CodeAnalysis.Remote.BrokeredServiceConnection`1.<TryInvokeAsync>d__18`1.MoveNext()
RPC server exception:
System.NullReferenceException: Object reference not set to an instance of an object.
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.<CreateModelForAttribute>g__getAttributeTarget|79_0(SyntaxNode targetSyntax)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.CreateModelForAttribute(Binder enclosingBinder, AttributeSyntax attribute, MemberSemanticModel containingModel)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.CreateMemberModel(CSharpSyntaxNode node)
      at System.Collections.Immutable.ImmutableInterlocked.GetOrAdd[TKey,TValue](ImmutableDictionary`2& location, TKey key, Func`2 valueFactory)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.GetOrAddModel(CSharpSyntaxNode node)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.GetMemberModel(SyntaxNode node)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.GetSymbolInfoWorker(CSharpSyntaxNode node, SymbolInfoOptions options, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.CSharpSemanticModel.GetSymbolInfo(ExpressionSyntax expression, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.CSharpExtensions.GetSymbolInfo(SemanticModel semanticModel, ExpressionSyntax expression, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.Classification.Classifiers.NameSyntaxClassifier.ClassifyTypeSyntax(NameSyntax name, SemanticModel semanticModel, ArrayBuilder`1 result, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.Classification.Classifiers.NameSyntaxClassifier.AddClassifications(SyntaxNode syntax, SemanticModel semanticModel, ClassificationOptions options, ArrayBuilder`1 result, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.Worker.ClassifyNode(SyntaxNode syntax)
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.Worker.ProcessNodes()
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.Worker.Classify(SemanticModel semanticModel, TextSpan textSpan, ArrayBuilder`1 list, Func`2 getNodeClassifiers, Func`2 getTokenClassifiers, ClassificationOptions options, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.<AddSemanticClassificationsAsync>d__6.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at Microsoft.CodeAnalysis.Classification.AbstractClassificationService.<AddClassificationsInCurrentProcessAsync>d__7.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at Microsoft.CodeAnalysis.Remote.RemoteSemanticClassificationService.<>c__DisplayClass20_0.<<GetClassificationsAsync>b__0>d.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.<>c__DisplayClass10_0`1.<<RunWithSolutionAsync>g__TryFastGetSolutionAndRunAsync|0>d.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.<RunWithSolutionAsync>d__10`1.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.BrokeredServiceBase.<RunWithSolutionAsync>d__11`1.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.BrokeredServiceBase.<RunServiceImplAsync>d__14`1.MoveNext()
@dotnet-issue-labeler dotnet-issue-labeler bot added Area-Analyzers untriaged Issues and PRs which have not yet been triaged by a lead labels Aug 24, 2022
@twest820
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Just happened again (after restarting VS), this time while switching between one file and another.

StreamJsonRpc.RemoteInvocationException: Object reference not set to an instance of an object.
   at StreamJsonRpc.JsonRpc.<InvokeCoreAsync>d__143`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Threading.Tasks.ValueTask`1.get_Result()
   at Microsoft.CodeAnalysis.Remote.BrokeredServiceConnection`1.<TryInvokeAsync>d__18`1.MoveNext()
RPC server exception:
System.NullReferenceException: Object reference not set to an instance of an object.
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.<CreateModelForAttribute>g__getAttributeTarget|79_0(SyntaxNode targetSyntax)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.CreateModelForAttribute(Binder enclosingBinder, AttributeSyntax attribute, MemberSemanticModel containingModel)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.CreateMemberModel(CSharpSyntaxNode node)
      at System.Collections.Immutable.ImmutableInterlocked.GetOrAdd[TKey,TValue](ImmutableDictionary`2& location, TKey key, Func`2 valueFactory)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.GetOrAddModel(CSharpSyntaxNode node)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.GetMemberModel(SyntaxNode node)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.GetSymbolInfoWorker(CSharpSyntaxNode node, SymbolInfoOptions options, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.CSharpSemanticModel.GetSymbolInfo(ExpressionSyntax expression, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.CSharpExtensions.GetSymbolInfo(SemanticModel semanticModel, ExpressionSyntax expression, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.Classification.Classifiers.NameSyntaxClassifier.ClassifyTypeSyntax(NameSyntax name, SemanticModel semanticModel, ArrayBuilder`1 result, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.Classification.Classifiers.NameSyntaxClassifier.AddClassifications(SyntaxNode syntax, SemanticModel semanticModel, ClassificationOptions options, ArrayBuilder`1 result, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.Worker.ClassifyNode(SyntaxNode syntax)
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.Worker.ProcessNodes()
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.Worker.Classify(SemanticModel semanticModel, TextSpan textSpan, ArrayBuilder`1 list, Func`2 getNodeClassifiers, Func`2 getTokenClassifiers, ClassificationOptions options, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.<AddSemanticClassificationsAsync>d__6.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at Microsoft.CodeAnalysis.Classification.AbstractClassificationService.<AddClassificationsInCurrentProcessAsync>d__7.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at Microsoft.CodeAnalysis.Remote.RemoteSemanticClassificationService.<>c__DisplayClass20_0.<<GetClassificationsAsync>b__0>d.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.<>c__DisplayClass10_0`1.<<RunWithSolutionAsync>g__TryFastGetSolutionAndRunAsync|0>d.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.<RunWithSolutionAsync>d__10`1.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.BrokeredServiceBase.<RunWithSolutionAsync>d__11`1.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.BrokeredServiceBase.<RunServiceImplAsync>d__14`1.MoveNext()

@Youssef1313
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@jcouv This looks like the crash you fixed in #62137?

@CyrusNajmabadi
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Yup. Looks like it. Closing out. Thanks!

@CyrusNajmabadi
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Fixed with #62137

@CyrusNajmabadi CyrusNajmabadi added this to the 17.4 P1 milestone Aug 24, 2022
@twest820
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I suppose it's nice there's a fix expected in 17.4. In the meantime, 17.3 fell over again.

StreamJsonRpc.RemoteInvocationException: Object reference not set to an instance of an object.
   at StreamJsonRpc.JsonRpc.<InvokeCoreAsync>d__143`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Threading.Tasks.ValueTask`1.get_Result()
   at Microsoft.CodeAnalysis.Remote.BrokeredServiceConnection`1.<TryInvokeAsync>d__18`1.MoveNext()
RPC server exception:
System.NullReferenceException: Object reference not set to an instance of an object.
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.<CreateModelForAttribute>g__getAttributeTarget|79_0(SyntaxNode targetSyntax)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.CreateModelForAttribute(Binder enclosingBinder, AttributeSyntax attribute, MemberSemanticModel containingModel)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.CreateMemberModel(CSharpSyntaxNode node)
      at System.Collections.Immutable.ImmutableInterlocked.GetOrAdd[TKey,TValue](ImmutableDictionary`2& location, TKey key, Func`2 valueFactory)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.GetOrAddModel(CSharpSyntaxNode node)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.GetMemberModel(SyntaxNode node)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.GetSymbolInfoWorker(CSharpSyntaxNode node, SymbolInfoOptions options, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.CSharpSemanticModel.GetSymbolInfo(ExpressionSyntax expression, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.CSharpExtensions.GetSymbolInfo(SemanticModel semanticModel, ExpressionSyntax expression, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.Classification.Classifiers.NameSyntaxClassifier.ClassifyTypeSyntax(NameSyntax name, SemanticModel semanticModel, ArrayBuilder`1 result, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.Classification.Classifiers.NameSyntaxClassifier.AddClassifications(SyntaxNode syntax, SemanticModel semanticModel, ClassificationOptions options, ArrayBuilder`1 result, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.Worker.ClassifyNode(SyntaxNode syntax)
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.Worker.ProcessNodes()
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.Worker.Classify(SemanticModel semanticModel, TextSpan textSpan, ArrayBuilder`1 list, Func`2 getNodeClassifiers, Func`2 getTokenClassifiers, ClassificationOptions options, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.<AddSemanticClassificationsAsync>d__6.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at Microsoft.CodeAnalysis.Classification.AbstractClassificationService.<AddClassificationsInCurrentProcessAsync>d__7.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at Microsoft.CodeAnalysis.Remote.RemoteSemanticClassificationService.<>c__DisplayClass20_0.<<GetClassificationsAsync>b__0>d.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.<>c__DisplayClass10_0`1.<<RunWithSolutionAsync>g__TryFastGetSolutionAndRunAsync|0>d.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.<RunWithSolutionAsync>d__10`1.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.BrokeredServiceBase.<RunWithSolutionAsync>d__11`1.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.BrokeredServiceBase.<RunServiceImplAsync>d__14`1.MoveNext()

@twest820
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And again.

StreamJsonRpc.RemoteInvocationException: Object reference not set to an instance of an object.
   at StreamJsonRpc.JsonRpc.<InvokeCoreAsync>d__143`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Threading.Tasks.ValueTask`1.get_Result()
   at Microsoft.CodeAnalysis.Remote.BrokeredServiceConnection`1.<TryInvokeAsync>d__18`1.MoveNext()
RPC server exception:
System.NullReferenceException: Object reference not set to an instance of an object.
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.<CreateModelForAttribute>g__getAttributeTarget|79_0(SyntaxNode targetSyntax)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.CreateModelForAttribute(Binder enclosingBinder, AttributeSyntax attribute, MemberSemanticModel containingModel)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.CreateMemberModel(CSharpSyntaxNode node)
      at System.Collections.Immutable.ImmutableInterlocked.GetOrAdd[TKey,TValue](ImmutableDictionary`2& location, TKey key, Func`2 valueFactory)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.GetOrAddModel(CSharpSyntaxNode node)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.GetMemberModel(SyntaxNode node)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.GetSymbolInfoWorker(CSharpSyntaxNode node, SymbolInfoOptions options, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.CSharpSemanticModel.GetSymbolInfo(ExpressionSyntax expression, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.CSharpExtensions.GetSymbolInfo(SemanticModel semanticModel, ExpressionSyntax expression, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.Classification.Classifiers.NameSyntaxClassifier.ClassifyTypeSyntax(NameSyntax name, SemanticModel semanticModel, ArrayBuilder`1 result, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.Classification.Classifiers.NameSyntaxClassifier.AddClassifications(SyntaxNode syntax, SemanticModel semanticModel, ClassificationOptions options, ArrayBuilder`1 result, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.Worker.ClassifyNode(SyntaxNode syntax)
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.Worker.ProcessNodes()
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.Worker.Classify(SemanticModel semanticModel, TextSpan textSpan, ArrayBuilder`1 list, Func`2 getNodeClassifiers, Func`2 getTokenClassifiers, ClassificationOptions options, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.<AddSemanticClassificationsAsync>d__6.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at Microsoft.CodeAnalysis.Classification.AbstractClassificationService.<AddClassificationsInCurrentProcessAsync>d__7.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at Microsoft.CodeAnalysis.Remote.RemoteSemanticClassificationService.<>c__DisplayClass20_0.<<GetClassificationsAsync>b__0>d.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.<>c__DisplayClass10_0`1.<<RunWithSolutionAsync>g__TryFastGetSolutionAndRunAsync|0>d.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.<RunWithSolutionAsync>d__10`1.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.BrokeredServiceBase.<RunWithSolutionAsync>d__11`1.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.BrokeredServiceBase.<RunServiceImplAsync>d__14`1.MoveNext()
```

@twest820
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And again. And again. And again. And again. And again. And again. And again....

Looks like, as of 17.3.0, it's possible to get this rule into a respawn and fail loop. Restarting Visual Studio does not help—the rule starts null reffing again as soon as the project is loaded—but I was able to get it back to sanity by leaving the error up and finishing the small code edit I was in the middle of typing.

IMO this is a dramatic response to someone having cut foo) from the end of a line and it not being humanly possible to paste foo) back in and tidy up the parenthesis before the null ref triggers. Perhaps it's worth considering pulling the candidate fix forward from 17.4 to 17.3.1 or such.

StreamJsonRpc.RemoteInvocationException: Object reference not set to an instance of an object.
   at StreamJsonRpc.JsonRpc.<InvokeCoreAsync>d__143`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Threading.Tasks.ValueTask`1.get_Result()
   at Microsoft.CodeAnalysis.Remote.BrokeredServiceConnection`1.<TryInvokeAsync>d__18`1.MoveNext()
RPC server exception:
System.NullReferenceException: Object reference not set to an instance of an object.
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.<CreateModelForAttribute>g__getAttributeTarget|79_0(SyntaxNode targetSyntax)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.CreateModelForAttribute(Binder enclosingBinder, AttributeSyntax attribute, MemberSemanticModel containingModel)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.CreateMemberModel(CSharpSyntaxNode node)
      at System.Collections.Immutable.ImmutableInterlocked.GetOrAdd[TKey,TValue](ImmutableDictionary`2& location, TKey key, Func`2 valueFactory)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.GetOrAddModel(CSharpSyntaxNode node)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.GetMemberModel(SyntaxNode node)
      at Microsoft.CodeAnalysis.CSharp.SyntaxTreeSemanticModel.GetSymbolInfoWorker(CSharpSyntaxNode node, SymbolInfoOptions options, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.CSharpSemanticModel.GetSymbolInfo(ExpressionSyntax expression, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.CSharpExtensions.GetSymbolInfo(SemanticModel semanticModel, ExpressionSyntax expression, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.Classification.Classifiers.NameSyntaxClassifier.ClassifyTypeSyntax(NameSyntax name, SemanticModel semanticModel, ArrayBuilder`1 result, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.CSharp.Classification.Classifiers.NameSyntaxClassifier.AddClassifications(SyntaxNode syntax, SemanticModel semanticModel, ClassificationOptions options, ArrayBuilder`1 result, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.Worker.ClassifyNode(SyntaxNode syntax)
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.Worker.ProcessNodes()
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.Worker.Classify(SemanticModel semanticModel, TextSpan textSpan, ArrayBuilder`1 list, Func`2 getNodeClassifiers, Func`2 getTokenClassifiers, ClassificationOptions options, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.Classification.AbstractSyntaxClassificationService.<AddSemanticClassificationsAsync>d__6.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at Microsoft.CodeAnalysis.Classification.AbstractClassificationService.<AddClassificationsInCurrentProcessAsync>d__7.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at Microsoft.CodeAnalysis.Remote.RemoteSemanticClassificationService.<>c__DisplayClass20_0.<<GetClassificationsAsync>b__0>d.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.<>c__DisplayClass10_0`1.<<RunWithSolutionAsync>g__TryFastGetSolutionAndRunAsync|0>d.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.<RunWithSolutionAsync>d__10`1.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.BrokeredServiceBase.<RunWithSolutionAsync>d__11`1.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at System.Threading.Tasks.ValueTask`1.get_Result()
      at Microsoft.CodeAnalysis.Remote.BrokeredServiceBase.<RunServiceImplAsync>d__14`1.MoveNext()

@NXTwoThou NXTwoThou mentioned this issue May 23, 2023
Merged
@gitamo626
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Same error in Visual Studio - although stack trace shows a different error.

Microsoft Visual Studio Community 2022 (64-bit) - Current
Version 17.6.1

StreamJsonRpc.RemoteInvocationException: SyntaxTree is not part of the compilation (Parameter 'syntaxTree') at StreamJsonRpc.JsonRpc.<InvokeCoreAsync>d__1511.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Threading.Tasks.ValueTask1.get_Result() at Microsoft.CodeAnalysis.Remote.BrokeredServiceConnection1.d__201.MoveNext() RPC server exception: System.ArgumentException: SyntaxTree is not part of the compilation (Parameter 'syntaxTree') at Microsoft.CodeAnalysis.CSharp.CSharpCompilation.GetSemanticModel(SyntaxTree syntaxTree, Boolean ignoreAccessibility) at Microsoft.CodeAnalysis.Document.GetSemanticModelAsync(CancellationToken cancellationToken) at Microsoft.CodeAnalysis.Shared.Extensions.DocumentExtensions.GetRequiredSemanticModelAsync(Document document, CancellationToken cancellationToken) at Microsoft.CodeAnalysis.Classification.AbstractEmbeddedLanguageClassificationService.AddEmbeddedLanguageClassificationsAsync(Document document, TextSpan textSpan, ClassificationOptions options, ArrayBuilder1 result, CancellationToken cancellationToken)
at Microsoft.CodeAnalysis.Classification.AbstractClassificationService.AddClassificationsInCurrentProcessAsync(Document document, TextSpan textSpan, ClassificationType type, ClassificationOptions options, ArrayBuilder1 result, CancellationToken cancellationToken) at Microsoft.CodeAnalysis.Remote.RemoteSemanticClassificationService.<>c__DisplayClass20_0.<<GetClassificationsAsync>b__0>d.MoveNext() --- End of stack trace from previous location --- at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.<>c__DisplayClass9_01.<g__ProcessSolutionAsync|1>d.MoveNext()
--- End of stack trace from previous location ---
at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.RunWithSolutionAsync[T](AssetProvider assetProvider, Checksum solutionChecksum, Int32 workspaceVersion, Boolean updatePrimaryBranch, Func2 implementation, CancellationToken cancellationToken) at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.RunWithSolutionAsync[T](AssetProvider assetProvider, Checksum solutionChecksum, Int32 workspaceVersion, Boolean updatePrimaryBranch, Func2 implementation, CancellationToken cancellationToken)
at Microsoft.CodeAnalysis.Remote.BrokeredServiceBase.RunWithSolutionAsync[T](Checksum solutionChecksum, Func2 implementation, CancellationToken cancellationToken) at Microsoft.CodeAnalysis.Remote.BrokeredServiceBase.RunServiceImplAsync[T](Func2 implementation, CancellationToken cancellationToken)
`

@darrylluther
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This continues to happen with 17.7.3:

StreamJsonRpc.RemoteInvocationException: SyntaxTree is not part of the compilation (Parameter 'syntaxTree')
at StreamJsonRpc.JsonRpc.d__1511.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Threading.Tasks.ValueTask1.get_Result()
at Microsoft.CodeAnalysis.Remote.BrokeredServiceConnection1.<TryInvokeAsync>d__201.MoveNext()
RPC server exception:
System.ArgumentException: SyntaxTree is not part of the compilation (Parameter 'syntaxTree')
at Microsoft.CodeAnalysis.CSharp.CSharpCompilation.GetSemanticModel(SyntaxTree syntaxTree, Boolean ignoreAccessibility)
at Microsoft.CodeAnalysis.Document.GetSemanticModelAsync(CancellationToken cancellationToken)
at Microsoft.CodeAnalysis.Shared.Extensions.DocumentExtensions.GetRequiredSemanticModelAsync(Document document, CancellationToken cancellationToken)
at Microsoft.CodeAnalysis.Classification.AbstractEmbeddedLanguageClassificationService.AddEmbeddedLanguageClassificationsAsync(Document document, TextSpan textSpan, ClassificationOptions options, SegmentedList1 result, CancellationToken cancellationToken) at Microsoft.CodeAnalysis.Classification.AbstractClassificationService.AddClassificationsInCurrentProcessAsync(Document document, TextSpan textSpan, ClassificationType type, ClassificationOptions options, SegmentedList1 result, CancellationToken cancellationToken)
at Microsoft.CodeAnalysis.Remote.RemoteSemanticClassificationService.<>c__DisplayClass20_0.<b__0>d.MoveNext()
--- End of stack trace from previous location ---
at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.<>c__DisplayClass9_01.<<RunWithSolutionAsync>g__ProcessSolutionAsync|1>d.MoveNext() --- End of stack trace from previous location --- at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.RunWithSolutionAsync[T](AssetProvider assetProvider, Checksum solutionChecksum, Int32 workspaceVersion, Boolean updatePrimaryBranch, Func2 implementation, CancellationToken cancellationToken)
at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.RunWithSolutionAsync[T](AssetProvider assetProvider, Checksum solutionChecksum, Int32 workspaceVersion, Boolean updatePrimaryBranch, Func2 implementation, CancellationToken cancellationToken) at Microsoft.CodeAnalysis.Remote.BrokeredServiceBase.RunWithSolutionAsync[T](Checksum solutionChecksum, Func2 implementation, CancellationToken cancellationToken)
at Microsoft.CodeAnalysis.Remote.BrokeredServiceBase.RunServiceImplAsync[T](Func`2 implementation, CancellationToken cancellationToken)

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@darrylluther @CyrusNajmabadi @twest820 @Youssef1313 @gitamo626