Feature Semantic classification is currently unavailable due to an internal error

[MrSuttonmann]

Version Used: Visual Studio 2022 (64 bit) - 17.12.3

Error appears in the gold bar at the top of Visual Studio.

StreamJsonRpc.RemoteInvocationException: OverriddenMethod cannot be null.
   at StreamJsonRpc.JsonRpc.<InvokeCoreAsync>d__156`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__20`1.MoveNext()
RPC server exception:
System.InvalidOperationException: OverriddenMethod cannot be null.
      at Microsoft.AspNetCore.Shared.MvcFacts.GetDeclaringType(IMethodSymbol method)
      at Microsoft.AspNetCore.Shared.MvcFacts.IsControllerAction(IMethodSymbol method, INamedTypeSymbol nonActionAttribute, IMethodSymbol disposableDispose)
      at Microsoft.AspNetCore.Analyzers.RouteEmbeddedLanguage.Infrastructure.MvcDetector.IsAction(IMethodSymbol methodSymbol, WellKnownTypes wellKnownTypes)
      at Microsoft.AspNetCore.Analyzers.RouteEmbeddedLanguage.Infrastructure.RouteUsageDetector.FindMvcMethod(WellKnownTypes wellKnownTypes, IMethodSymbol methodSymbol)
      at Microsoft.AspNetCore.Analyzers.RouteEmbeddedLanguage.Infrastructure.RouteUsageDetector.BuildContext(RouteOptions routeOptions, SyntaxToken token, SemanticModel semanticModel, WellKnownTypes wellKnownTypes, CancellationToken cancellationToken)
      at Microsoft.AspNetCore.App.Analyzers.Infrastructure.RouteUsageCache.<>c__DisplayClass6_0.<GetAndCache>b__0(SyntaxToken token)
      at Microsoft.AspNetCore.App.Analyzers.Infrastructure.RouteUsageCache.GetAndCache(SyntaxToken syntaxToken, CancellationToken cancellationToken)
      at Microsoft.AspNetCore.Analyzers.RouteEmbeddedLanguage.RoutePatternClassifier.RegisterClassifications(AspNetCoreEmbeddedLanguageClassificationContext context)
      at Microsoft.CodeAnalysis.ExternalAccess.AspNetCore.Internal.EmbeddedLanguages.AspNetCoreEmbeddedLanguageClassifier.RegisterClassifications(EmbeddedLanguageClassificationContext context)
      at Microsoft.CodeAnalysis.Classification.AbstractEmbeddedLanguageClassificationService.Worker.ClassifyToken(SyntaxToken token)
      at Microsoft.CodeAnalysis.Classification.AbstractEmbeddedLanguageClassificationService.Worker.VisitTokens(SyntaxNode node)
      at Microsoft.CodeAnalysis.Classification.AbstractEmbeddedLanguageClassificationService.AddEmbeddedLanguageClassifications(SolutionServices services, Project project, SemanticModel semanticModel, ImmutableArray`1 textSpans, ClassificationOptions options, SegmentedList`1 result, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.Classification.AbstractEmbeddedLanguageClassificationService.AddEmbeddedLanguageClassificationsAsync(Document document, ImmutableArray`1 textSpans, ClassificationOptions options, SegmentedList`1 result, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.Classification.AbstractClassificationService.AddClassificationsInCurrentProcessAsync(Document document, ImmutableArray`1 textSpans, ClassificationType type, ClassificationOptions options, SegmentedList`1 result, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.Classification.AbstractClassificationService.AddClassificationsAsync(Document document, ImmutableArray`1 textSpans, ClassificationOptions options, ClassificationType type, SegmentedList`1 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__DisplayClass7_0`1.<<RunWithSolutionAsync>g__ProcessSolutionAsync|1>d.MoveNext()
   --- End of stack trace from previous location ---
      at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.RunWithSolutionAsync[T](AssetProvider assetProvider, Checksum solutionChecksum, Boolean updatePrimaryBranch, Func`2 implementation, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.Remote.RemoteWorkspace.RunWithSolutionAsync[T](AssetProvider assetProvider, Checksum solutionChecksum, Boolean updatePrimaryBranch, Func`2 implementation, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.Remote.BrokeredServiceBase.RunWithSolutionAsync[T](Checksum solutionChecksum, Func`2 implementation, CancellationToken cancellationToken)
      at Microsoft.CodeAnalysis.Remote.BrokeredServiceBase.RunServiceImplAsync[T](Func`2 implementation, CancellationToken cancellationToken)

[CyrusNajmabadi]

This is not Roslyn. This is asp.net

[MrSuttonmann]

This is not Roslyn. This is asp.net

There have been previous similar issues raised in this repository, eg: dotnet/roslyn#67442, dotnet/roslyn#70429, et al.

[CyrusNajmabadi]

This is not Roslyn. This is asp.net

There have been previous similar issues raised in this repository, eg: dotnet/roslyn#67442, dotnet/roslyn#70429, et al.

Neither of those issues are asp.net. Both are Roslyn. This issue is an issue in asp.net.

[CyrusNajmabadi]

Moving to asp.net