Syntax highlighting got into broken state, won't recover

[Peter-Juhasz]

VS 17.14.2 P1

20250525-1828-05.6169503.mp4

Error log is many errors:

System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.                   Parameter name: span                      at Microsoft.CodeAnalysis.Text.SubText..ctor(SourceText text, TextSpan span)                      at Microsoft.CodeAnalysis.Text.SubText.GetSubText(TextSpan span)                      at Microsoft.CodeAnalysis.Text.CompositeText.RemoveSplitLineBreaksAndEmptySegments(ArrayBuilder`1 segments)                      at Microsoft.CodeAnalysis.Text.CompositeText.ToSourceText(ArrayBuilder`1 segments, SourceText original, Boolean adjustSegments)                      at Microsoft.CodeAnalysis.Text.SourceText.WithChanges(IEnumerable`1 changes)                      at Microsoft.CodeAnalysis.Text.ChangedText.WithChanges(IEnumerable`1 changes)                      at Microsoft.AspNetCore.Razor.LanguageServer.DocumentSynchronization.DocumentDidChangeEndpoint.ApplyContentChanges(IEnumerable`1 contentChanges, SourceText sourceText)                      at Microsoft.AspNetCore.Razor.LanguageServer.DocumentSynchronization.DocumentDidChangeEndpoint.<HandleNotificationAsync>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.CommonLanguageServerProtocol.Framework.QueueItem`1.<StartRequestAsync>d__17`2.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.CommonLanguageServerProtocol.Framework.QueueItem`1.<StartRequestAsync>d__17`2.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.CommonLanguageServerProtocol.Framework.RequestExecutionQueue`1.<ProcessQueueCoreAsync>d__18`2.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.CommonLanguageServerProtocol.Framework.RequestExecutionQueue`1.<InvokeProcessCoreAsync>d__17.MoveNext()                   --- End of stack trace from previous location where exception was thrown ---                      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()                      at Microsoft.CommonLanguageServerProtocol.Framework.RequestExecutionQueue`1.<ProcessQueueAsync>d__16.MoveNext()

System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.                   Parameter name: span                      at Microsoft.CodeAnalysis.Text.SubText..ctor(SourceText text, TextSpan span)                      at Microsoft.CodeAnalysis.Text.SubText.GetSubText(TextSpan span)                      at Microsoft.CodeAnalysis.Text.CompositeText.RemoveSplitLineBreaksAndEmptySegments(ArrayBuilder`1 segments)                      at Microsoft.CodeAnalysis.Text.CompositeText.ToSourceText(ArrayBuilder`1 segments, SourceText original, Boolean adjustSegments)                      at Microsoft.CodeAnalysis.Text.SourceText.WithChanges(IEnumerable`1 changes)                      at Microsoft.CodeAnalysis.Text.ChangedText.WithChanges(IEnumerable`1 changes)                      at Microsoft.AspNetCore.Razor.LanguageServer.DocumentSynchronization.DocumentDidChangeEndpoint.ApplyContentChanges(IEnumerable`1 contentChanges, SourceText sourceText)                      at Microsoft.AspNetCore.Razor.LanguageServer.DocumentSynchronization.DocumentDidChangeEndpoint.<HandleNotificationAsync>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.CommonLanguageServerProtocol.Framework.QueueItem`1.<StartRequestAsync>d__17`2.MoveNext()

System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.                   Parameter name: character                      at Microsoft.CodeAnalysis.Text.LinePosition..ctor(Int32 line, Int32 character)                      at Microsoft.CodeAnalysis.Text.TextLineCollection.GetLinePosition(Int32 position)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxNodeExtensions.GetSourceSpan(SyntaxNode node, RazorSourceDocument source)                      at Microsoft.AspNetCore.Razor.Language.RazorHtmlWriter.WriteToken(SyntaxToken token)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.Visit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.DefaultVisit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.RazorHtmlWriter.WriteNode[TNode](TNode node, Boolean isHtml, Action`1 handler)                      at Microsoft.AspNetCore.Razor.Language.RazorHtmlWriter.VisitMarkupTextLiteral(MarkupTextLiteralSyntax node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.Visit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.DefaultVisit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.Visit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.DefaultVisit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.Visit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.DefaultVisit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.Visit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.DefaultVisit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.Visit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.DefaultVisit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.Visit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.DefaultVisit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.Visit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.DefaultVisit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.Visit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.DefaultVisit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.Visit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.DefaultVisit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.Visit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.DefaultVisit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxWalker.Visit(SyntaxNode node)                      at Microsoft.AspNetCore.Razor.Language.RazorHtmlWriter.Visit(RazorSyntaxTree syntaxTree)                      at Microsoft.AspNetCore.Razor.Language.RazorHtmlWriter.GetHtmlDocument(RazorCodeDocument codeDocument)                      at Microsoft.AspNetCore.Razor.Language.RazorCodeDocumentExtensions.GetHtmlDocument(RazorCodeDocument codeDocument)                      at Microsoft.CodeAnalysis.Razor.DocumentMapping.IDocumentMappingServiceExtensions.GetPositionInfo(IDocumentMappingService service, RazorCodeDocument codeDocument, Int32 hostDocumentIndex)                      at Microsoft.AspNetCore.Razor.LanguageServer.Completion.Delegation.DelegatedCompletionListProvider.GetCompletionListAsync(RazorCodeDocument codeDocument, Int32 absoluteIndex, VSInternalCompletionContext completionContext, DocumentContext documentContext, VSInternalClientCapabilities clientCapabilities, RazorCompletionOptions razorCompletionOptions, Guid correlationId, CancellationToken cancellationToken)                      at Microsoft.AspNetCore.Razor.LanguageServer.Completion.CompletionListProvider.<GetCompletionListCoreAsync>d__5.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.AspNetCore.Razor.LanguageServer.Completion.RazorCompletionEndpoint.<HandleRequestAsync>d__10.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.CommonLanguageServerProtocol.Framework.QueueItem`1.<StartRequestAsync>d__17`2.MoveNext()

Error thrown while retrieving CSharp semantic range.                   System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.                   Parameter name: character                      at Microsoft.CodeAnalysis.Text.LinePosition..ctor(Int32 line, Int32 character)                      at Microsoft.CodeAnalysis.Text.TextLineCollection.GetLinePosition(Int32 position)                      at Microsoft.CodeAnalysis.Razor.DocumentMapping.AbstractDocumentMappingService.TryMapToHostDocumentPosition(IRazorGeneratedDocument generatedDocument, Int32 generatedDocumentIndex, LinePosition& hostDocumentPosition, Int32& hostDocumentIndex)                      at Microsoft.CodeAnalysis.Razor.DocumentMapping.AbstractDocumentMappingService.TryMapToHostDocumentRangeStrict(IRazorGeneratedDocument generatedDocument, LinePositionSpan generatedDocumentRange, LinePositionSpan& hostDocumentRange)                      at Microsoft.CodeAnalysis.Razor.DocumentMapping.AbstractDocumentMappingService.TryMapToHostDocumentRange(IRazorGeneratedDocument generatedDocument, LinePositionSpan generatedDocumentRange, MappingBehavior mappingBehavior, LinePositionSpan& hostDocumentRange)                      at Microsoft.CodeAnalysis.Razor.SemanticTokens.AbstractRazorSemanticTokensInfoService.<GetCSharpSemanticRangesAsync>d__10.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.Razor.SemanticTokens.AbstractRazorSemanticTokensInfoService.<GetSemanticTokensAsync>d__8.MoveNext()