Blazor unsupported?

[akkgr]

Working with a Blazor project is practical immpossible,

• Formatting not working or worse corrupts file
• Syntax highlight not working
• Autocomplete suggestion not working
• Errors, Warnings e.t.c not working

After clean and build project and restart vscode all might work until a file save then again nothing works.
Really does anyone is working blazor projects with vscode ?

[JoeRobich]

@akkgr Can you please share the OmniSharp Log from the VS Code Output pane?

[akkgr]

@akkgr Can you please share the OmniSharp Log from the VS Code Output pane?

One example...
this is the log when I open vscode, in the blazor project all razor files are red indicating errors although project builds successfully

Starting OmniSharp server at 12/1/2022, 10:45:19 π.μ.
Target: d:\work\github\myEstia\myEstia.sln

OmniSharp server started.
Path: c:\Users\tasos.vscode\extensions\ms-dotnettools.csharp-1.23.17.omnisharp\1.37.17\OmniSharp.exe
PID: 5640

Starting OmniSharp on Windows 6.2.9200.0 (x64)
info: OmniSharp.Services.DotNetCliService
Checking the 'DOTNET_ROOT' environment variable to find a .NET SDK
info: OmniSharp.Services.DotNetCliService
Using the 'dotnet' on the PATH.
info: OmniSharp.Services.DotNetCliService
DotNetPath set to dotnet
info: OmniSharp.MSBuild.Discovery.MSBuildLocator
Located 2 MSBuild instance(s)
1: Visual Studio Community 2022 17.0.32014.148 17.0.0 - "C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Current\Bin"
2: StandAlone 17.0.0 - "c:\Users\tasos.vscode\extensions\ms-dotnettools.csharp-1.23.17.omnisharp\1.37.17.msbuild\Current\Bin"
info: OmniSharp.MSBuild.Discovery.MSBuildLocator
Registered MSBuild instance: Visual Studio Community 2022 17.0.32014.148 17.0.0 - "C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Current\Bin"
info: OmniSharp.WorkspaceInitializer
Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.CSharpFormattingWorkspaceOptionsProvider, Order: 0
info: OmniSharp.WorkspaceInitializer
Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.Completion.CompletionOptionsProvider, Order: 0
info: OmniSharp.WorkspaceInitializer
Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.RenameWorkspaceOptionsProvider, Order: 100
info: OmniSharp.WorkspaceInitializer
Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.ImplementTypeWorkspaceOptionsProvider, Order: 110
info: OmniSharp.WorkspaceInitializer
Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.BlockStructureWorkspaceOptionsProvider, Order: 140
info: OmniSharp.Cake.CakeProjectSystem
Detecting Cake files in 'd:\work\github\myEstia'.
info: OmniSharp.Cake.CakeProjectSystem
Could not find any Cake files
info: OmniSharp.MSBuild.ProjectSystem
Detecting projects in 'd:\work\github\myEstia\myEstia.sln'.
info: OmniSharp.MSBuild.ProjectManager
Queue project update for 'd:\work\github\myEstia\Server\Estia.Server.csproj'
info: OmniSharp.MSBuild.ProjectManager
Queue project update for 'd:\work\github\myEstia\Shared\Estia.Shared.csproj'
info: OmniSharp.MSBuild.ProjectManager
Queue project update for 'd:\work\github\myEstia\Client\Estia.Client.csproj'
info: OmniSharp.Script.ScriptProjectSystem
Detecting CSX files in 'd:\work\github\myEstia'.
info: OmniSharp.Script.ScriptProjectSystem
Could not find any CSX files
info: OmniSharp.WorkspaceInitializer
Configuration finished.
info: OmniSharp.Stdio.Host
Omnisharp server running using Stdio at location 'd:\work\github\myEstia' on host 5900.
info: OmniSharp.MSBuild.ProjectManager
Loading project: d:\work\github\myEstia\Server\Estia.Server.csproj
info: OmniSharp.OmniSharpWorkspace
Miscellaneous file: d:\work\github\myEstia\Client\Pages\Buildings\ApartmentEdit.razor__virtual.cs added to workspace
info: OmniSharp.MSBuild.ProjectManager
Successfully loaded project file 'd:\work\github\myEstia\Server\Estia.Server.csproj'.
info: OmniSharp.MSBuild.ProjectManager
Adding project 'd:\work\github\myEstia\Server\Estia.Server.csproj'
info: OmniSharp.MSBuild.ProjectManager
Loading project: d:\work\github\myEstia\Shared\Estia.Shared.csproj
info: OmniSharp.MSBuild.ProjectManager
Successfully loaded project file 'd:\work\github\myEstia\Shared\Estia.Shared.csproj'.
info: OmniSharp.MSBuild.ProjectManager
Adding project 'd:\work\github\myEstia\Shared\Estia.Shared.csproj'
info: OmniSharp.MSBuild.ProjectManager
Loading project: d:\work\github\myEstia\Client\Estia.Client.csproj
info: OmniSharp.MSBuild.ProjectManager
Successfully loaded project file 'd:\work\github\myEstia\Client\Estia.Client.csproj'.
info: OmniSharp.MSBuild.ProjectManager
Adding project 'd:\work\github\myEstia\Client\Estia.Client.csproj'
info: OmniSharp.MSBuild.ProjectManager
Update project: Estia.Server
info: OmniSharp.MSBuild.ProjectManager
Update project: Estia.Shared
info: OmniSharp.MSBuild.ProjectManager
Update project: Estia.Client
info: OmniSharp.Roslyn.CSharp.Services.Diagnostics.CSharpDiagnosticWorkerWithAnalyzers
Solution initialized -> queue all documents for code analysis. Initial document count: 188.

[JoeRobich]

Well this is a good sign that the Razor support is recognizing the project.

info: OmniSharp.OmniSharpWorkspace
Miscellaneous file: d:\work\github\myEstia\Client\Pages\Buildings\ApartmentEdit.razor__virtual.cs added to workspace

Do you see these same errors with a new Blazor project? If so, what is the workflow that gets it into the broken state?

CC: @ryanbrandenburg in case you have questions.

[ryanbrandenburg]

@akkgr the log you pasted doesn't indicate anything out of the ordinary that I noticed, and I wasn't able to repro what you describe. What kind of errors are you seeing when they're "red indicating errors"? Could you copy-paste or screenshot those errors?

Edit: Removed my request to check against a "basic" project since @JoeRobich beat me to it.

[travisnielsen]

I can reproduce this error with a multi-root workspace in VS Code. I created a sample here, which includes two projects initialized using dotnet new. This is what I see:

OmniSharp logs don't say much out of the ordinary. I do see errors in the Razor logs.

OmniSharp Log

Starting OmniSharp server at 1/22/2022, 10:31:52 AM
    Target: /Users/travisnielsen/repos/omnitest/blazordemo
OmniSharp server started with .NET 6.0.101

.

Path: /Users/travisnielsen/.vscode/extensions/ms-dotnettools.csharp-1.24.0/.omnisharp/1.38.0-net6.0/OmniSharp.dll

PID: 16972
Starting OmniSharp on Unknown 0.0 (Unknown)

info: OmniSharp.Services.DotNetCliService

Checking the 'DOTNET_ROOT' environment variable to find a .NET SDK

info: OmniSharp.Services.DotNetCliService

Using the 'dotnet' on the PATH.

info: OmniSharp.Services.DotNetCliService

DotNetPath set to dotnet

info: OmniSharp.MSBuild.Discovery.MSBuildLocator

Located 1 MSBuild instance(s)

1: .NET Core SDK 6.0.101 17.0.0 - "/usr/local/share/dotnet/sdk/6.0.101/"

info: OmniSharp.MSBuild.Discovery.MSBuildLocator

Registered MSBuild instance: .NET Core SDK 6.0.101 17.0.0 - "/usr/local/share/dotnet/sdk/6.0.101/"

info: OmniSharp.WorkspaceInitializer

Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.CSharpFormattingWorkspaceOptionsProvider, Order: 0

info: OmniSharp.WorkspaceInitializer

Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.Completion.CompletionOptionsProvider, Order: 0

info: OmniSharp.WorkspaceInitializer

Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.RenameWorkspaceOptionsProvider, Order: 100

info: OmniSharp.WorkspaceInitializer

Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.ImplementTypeWorkspaceOptionsProvider, Order: 110

info: OmniSharp.WorkspaceInitializer

Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.BlockStructureWorkspaceOptionsProvider, Order: 140

info: OmniSharp.MSBuild.ProjectSystem

No solution files found in '/Users/travisnielsen/repos/omnitest/blazordemo'

info: OmniSharp.MSBuild.ProjectManager

Queue project update for '/Users/travisnielsen/repos/omnitest/blazordemo/blazordemo.csproj'

info: OmniSharp.Script.ScriptProjectSystem

Detecting CSX files in '/Users/travisnielsen/repos/omnitest/blazordemo'.

info: OmniSharp.Script.ScriptProjectSystem

Did not find any CSX files

info: OmniSharp.WorkspaceInitializer

Configuration finished.

info: OmniSharp.Stdio.Host

Omnisharp server running using Stdio at location '/Users/travisnielsen/repos/omnitest/blazordemo' on host 16613.

info: OmniSharp.MSBuild.ProjectManager

Loading project: /Users/travisnielsen/repos/omnitest/blazordemo/blazordemo.csproj

info: OmniSharp.OmniSharpWorkspace

Miscellaneous file: /Users/travisnielsen/repos/omnitest/blazordemo/App.razor__virtual.cs added to workspace

info: OmniSharp.MSBuild.ProjectManager

Successfully loaded project file '/Users/travisnielsen/repos/omnitest/blazordemo/blazordemo.csproj'.

info: OmniSharp.MSBuild.ProjectManager

Adding project '/Users/travisnielsen/repos/omnitest/blazordemo/blazordemo.csproj'

info: OmniSharp.MSBuild.ProjectManager

Update project: blazordemo

Razor Log

OmniSharp.Extensions.LanguageServer.Shared.LspRequestRouter: Finished: Routing Request (2) textDocument/codeAction in 56ms | Id='2' Method='textDocument/codeAction' ElapsedMilliseconds='56'

[Error - 6:08:12 PM] OmniSharp.Extensions.JsonRpc.InputHandler: Failed to handle request textDocument/codeAction 2 - OmniSharp.Extensions.JsonRpc.Server.MethodNotSupportedException: Method not found: 'razor/provideCodeActions'.

at OmniSharp.Extensions.JsonRpc.ResponseRouter.ResponseRouterReturnsImpl.Returning[TResponse](CancellationToken cancellationToken) in OmniSharp.Extensions.JsonRpc.dll:token 0x6000b4d+0x16f

at Microsoft.AspNetCore.Razor.LanguageServer.CodeActions.CodeActionEndpoint.GetCSharpCodeActionsFromLanguageServerAsync(RazorCodeActionContext context, CancellationToken cancellationToken) in //src/Razor/src/Microsoft.AspNetCore.Razor.LanguageServer/CodeActions/CodeActionEndpoint.cs:line 263

at Microsoft.AspNetCore.Razor.LanguageServer.CodeActions.CodeActionEndpoint.GetCSharpCodeActionsAsync(RazorCodeActionContext context, CancellationToken cancellationToken) in //src/Razor/src/Microsoft.AspNetCore.Razor.LanguageServer/CodeActions/CodeActionEndpoint.cs:line 184

at Microsoft.AspNetCore.Razor.LanguageServer.CodeActions.CodeActionEndpoint.Handle(RazorCodeActionParams request, CancellationToken cancellationToken) in /_/src/Razor/src/Microsoft.AspNetCore.Razor.LanguageServer/CodeActions/CodeActionEndpoint.cs:line 99

at OmniSharp.Extensions.LanguageServer.Server.Pipelines.SemanticTokensDeltaPipeline2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) in OmniSharp.Extensions.LanguageServer.dll:token 0x60000a0+0x2a6

at OmniSharp.Extensions.LanguageServer.Server.Pipelines.ResolveCommandPipeline2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) in OmniSharp.Extensions.LanguageServer.dll:token 0x600009f+0x0

at MediatR.Pipeline.RequestPreProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) in MediatR.dll:token 0x6000058+0x0

at MediatR.Pipeline.RequestPostProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) in MediatR.dll:token 0x6000056+0x0

at MediatR.Pipeline.RequestExceptionProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) in MediatR.dll:token 0x6000053+0x0

at MediatR.Pipeline.RequestExceptionProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) in MediatR.dll:token 0x6000053+0x25c

at MediatR.Pipeline.RequestExceptionActionProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) in MediatR.dll:token 0x600004a+0x0

at MediatR.Pipeline.RequestExceptionActionProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) in MediatR.dll:token 0x600004a+0x1cd

at OmniSharp.Extensions.JsonRpc.RequestRouterBase1.<RouteRequest>g__InnerRoute|5_0(IServiceScopeFactory serviceScopeFactory, Request request, TDescriptor descriptor, Object params, CancellationToken token, ILogger logger) in OmniSharp.Extensions.JsonRpc.dll:token 0x600022a+0xfc at OmniSharp.Extensions.JsonRpc.RequestRouterBase1.RouteRequest(IRequestDescriptor1 descriptors, Request request, CancellationToken token) in OmniSharp.Extensions.JsonRpc.dll:token 0x6000221+0x49f at OmniSharp.Extensions.JsonRpc.InputHandler.<>c__DisplayClass38_0.<<RouteRequest>b__5>d.MoveNext() in OmniSharp.Extensions.JsonRpc.dll:token 0x6001089+0xf2 | Method='textDocument/codeAction' RequestId='2' OmniSharp.Extensions.JsonRpc.InputHandler: Finished: Processing request textDocument/codeAction 2 in 119ms | Method='textDocument/codeAction' ResponseId='2' ElapsedMilliseconds='119' [Error - 6:08:12 PM] Request textDocument/codeAction failed. Message: Internal Error - OmniSharp.Extensions.JsonRpc.Server.MethodNotSupportedException: Method not found: 'razor/provideCodeActions'. at OmniSharp.Extensions.JsonRpc.ResponseRouter.ResponseRouterReturnsImpl.Returning[TResponse](CancellationToken cancellationToken) in OmniSharp.Extensions.JsonRpc.dll:token 0x6000b4d+0x16f at Microsoft.AspNetCore.Razor.LanguageServer.CodeActions.CodeActionEndpoint.GetCSharpCodeActionsFromLanguageServerAsync(RazorCodeActionContext context, CancellationToken cancellationToken) in /_/src/Razor/src/Microsoft.AspNetCore.Razor.LanguageServer/CodeActions/CodeActionEndpoint.cs:line 263 at Microsoft.AspNetCore.Razor.LanguageServer.CodeActions.CodeActionEndpoint.GetCSharpCodeActionsAsync(RazorCodeActionContext context, CancellationToken cancellationToken) in /_/src/Razor/src/Microsoft.AspNetCore.Razor.LanguageServer/CodeActions/CodeActionEndpoint.cs:line 184 at Microsoft.AspNetCore.Razor.LanguageServer.CodeActions.CodeActionEndpoint.Handle(RazorCodeActionParams request, CancellationToken cancellationToken) in /_/src/Razor/src/Microsoft.AspNetCore.Razor.LanguageServer/CodeActions/CodeActionEndpoint.cs:line 99 at OmniSharp.Extensions.LanguageServer.Server.Pipelines.SemanticTokensDeltaPipeline2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) in OmniSharp.Extensions.LanguageServer.dll:token 0x60000a0+0x2a6 at OmniSharp.Extensions.LanguageServer.Server.Pipelines.ResolveCommandPipeline2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) in OmniSharp.Extensions.LanguageServer.dll:token 0x600009f+0x0 at MediatR.Pipeline.RequestPreProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) in MediatR.dll:token 0x6000058+0x0 at MediatR.Pipeline.RequestPostProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) in MediatR.dll:token 0x6000056+0x0 at MediatR.Pipeline.RequestExceptionProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) in MediatR.dll:token 0x6000053+0x0 at MediatR.Pipeline.RequestExceptionProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) in MediatR.dll:token 0x6000053+0x25c at MediatR.Pipeline.RequestExceptionActionProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) in MediatR.dll:token 0x600004a+0x0 at MediatR.Pipeline.RequestExceptionActionProcessorBehavior2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate1 next) in MediatR.dll:token 0x600004a+0x1cd at OmniSharp.Extensions.JsonRpc.RequestRouterBase1.g__InnerRoute|5_0(IServiceScopeFactory serviceScopeFactory, Request request, TDescriptor descriptor, Object params, CancellationToken token, ILogger logger) in OmniSharp.Extensions.JsonRpc.dll:token 0x600022a+0xfc

at OmniSharp.Extensions.JsonRpc.RequestRouterBase1.RouteRequest(IRequestDescriptor1 descriptors, Request request, CancellationToken token) in OmniSharp.Extensions.JsonRpc.dll:token 0x6000221+0x49f

at OmniSharp.Extensions.JsonRpc.InputHandler.<>c__DisplayClass38_0.<b__5>d.MoveNext() in OmniSharp.Extensions.JsonRpc.dll:token 0x6001089+0xf2

Code: -32603

OmniSharp.Extensions.LanguageServer.Shared.LspRequestRouter: Finding descriptors for textDocument/hover | Method='textDocument/hover'

OmniSharp.Extensions.LanguageServer.Server.Matchers.TextDocumentMatcher: Found attributes 1, razor::file:///Users/travisnielsen/repos/gift-tracker/Client/Pages/EditItem.razor | Count='1' Attributes='razor::file:///Users/travisnielsen/repos/gift-tracker/Client/Pages/EditItem.razor'

OmniSharp.Extensions.LanguageServer.Server.Matchers.TextDocumentMatcher: Looking for handler for descriptors textDocument/hover | Method='textDocument/hover'

OmniSharp.Extensions.LanguageServer.Server.Matchers.TextDocumentMatcher: Checking handler textDocument/hover:Microsoft.AspNetCore.Razor.LanguageServer.Hover.RazorHoverEndpoint | Method='textDocument/hover' Handler='Microsoft.AspNetCore.Razor.LanguageServer.Hover.RazorHoverEndpoint'

OmniSharp.Extensions.LanguageServer.Server.Matchers.TextDocumentMatcher: Registration options OmniSharp.Extensions.LanguageServer.Protocol.Models.HoverRegistrationOptions | OptionsName='OmniSharp.Extensions.LanguageServer.Protocol.Models.HoverRegistrationOptions'

OmniSharp.Extensions.LanguageServer.Server.Matchers.TextDocumentMatcher: Document Selector [/*.{cshtml,razor}] | DocumentSelector='[/.{cshtml,razor}]'

OmniSharp.Extensions.LanguageServer.Server.Matchers.TextDocumentMatcher: Handler Selected: Microsoft.AspNetCore.Razor.LanguageServer.Hover.RazorHoverEndpoint  via [**/.{cshtml,razor}] (targeting OmniSharp.Extensions.JsonRpc.IJsonRpcRequestHandler2[[OmniSharp.Extensions.LanguageServer.Protocol.Models.HoverParams, OmniSharp.Extensions.LanguageProtocol, Version=0.18.0.0, Culture=neutral, PublicKeyToken=6d868dff454e6022],[OmniSharp.Extensions.LanguageServer.Protocol.Models.Hover, OmniSharp.Extensions.LanguageProtocol, Version=0.18.0.0, Culture=neutral, PublicKeyToken=6d868dff454e6022]]) | Handler='Microsoft.AspNetCore.Razor.LanguageServer.Hover.RazorHoverEndpoint' Id='' DocumentSelector='[**/*.{cshtml,razor}]' HandlerInterface='OmniSharp.Extensions.JsonRpc.IJsonRpcRequestHandler2[[OmniSharp.Extensions.LanguageServer.Protocol.Models.HoverParams, OmniSharp.Extensions.LanguageProtocol, Version=0.18.0.0, Culture=neutral, PublicKeyToken=6d868dff454e6022],[OmniSharp.Extensions.LanguageServer.Protocol.Models.Hover, OmniSharp.Extensions.LanguageProtocol, Version=0.18.0.0, Culture=neutral, PublicKeyToken=6d868dff454e6022]]'

OmniSharp.Extensions.JsonRpc.ProcessScheduler: Queueing Parallel:textDocument/hover:3 request for processing | Type='Parallel' Name='textDocument/hover:3'

OmniSharp.Extensions.JsonRpc.InputHandler: Starting: Processing request textDocument/hover 3 | Method='textDocument/hover' ResponseId='3'

OmniSharp.Extensions.LanguageServer.Shared.LspRequestRouter: Starting: Routing Request (3) textDocument/hover | Id='3' Method='textDocument/hover'

OmniSharp.Extensions.LanguageServer.Shared.LspRequestRouter: Converting params for Request (3) textDocument/hover to OmniSharp.Extensions.LanguageServer.Protocol.Models.HoverParams | Id='3' Method='textDocument/hover' Type='OmniSharp.Extensions.LanguageServer.Protocol.Models.HoverParams'

OmniSharp.Extensions.LanguageServer.Shared.LspRequestRouter: Converting params for Notification textDocument/hover to OmniSharp.Extensions.LanguageServer.Protocol.Models.HoverParams | Method='textDocument/hover' Type='OmniSharp.Extensions.LanguageServer.Protocol.Models.HoverParams'

Microsoft.AspNetCore.Razor.LanguageServer.Hover.RazorHoverEndpoint: Found hover info items. |

OmniSharp.Extensions.LanguageServer.Shared.LspRequestRouter: Response value was (null) | Type='(null)'

OmniSharp.Extensions.LanguageServer.Shared.LspRequestRouter: Finished: Routing Request (3) textDocument/hover in 41ms | Id='3' Method='textDocument/hover' ElapsedMilliseconds='41'

OmniSharp.Extensions.JsonRpc.InputHandler: Finished: Processing request textDocument/hover 3 in 41ms | Method='textDocument/hover' ResponseId='3' ElapsedMilliseconds='41'

[travisnielsen]

This issue appears to be very similar to: dotnet/razor#5517

[tthiery]

@mikadumont @dibarbet Is anyone working on this? Blazor is such an amazing platform (as SPA, as SSR, and soonish especially as Hybrid App) but the VS Code razor file editing experience is is up until today a mess. And AFAIR it was better with O#.

I am currently editing a blazor app and I am basically back in the old school experience of vi on text screen how it was back when I learned programming in the 90s.

[tthiery]

Current Stack Trace for me. These range errors are all over the place when editing razor files.

Error - 10:55:07 AM] [LanguageServerHost] System.ArgumentException: Range={ Start={ Line=140, Character=0 }, End={ Line=1043, Character=0 } }. text.Length=39. text.Lines.Count=3
 ---> System.ArgumentOutOfRangeException: The requested line number 140 must be less than the number of lines 3. (Parameter 'Line')
   at Microsoft.CodeAnalysis.Text.TextLineCollection.GetPosition(LinePosition position) in /_/src/Compilers/Core/Portable/Text/TextLineCollection.cs:line 67
   at Microsoft.CodeAnalysis.Text.TextLineCollection.GetTextSpan(LinePositionSpan span) in /_/src/Compilers/Core/Portable/Text/TextLineCollection.cs:line 78
   at Microsoft.CodeAnalysis.LanguageServer.ProtocolConversions.RangeToTextSpan(Range range, SourceText text) in /_/src/Features/LanguageServer/Protocol/Extensions/ProtocolConversions.cs:line 300
   --- End of inner exception stack trace ---
   at Microsoft.CodeAnalysis.LanguageServer.ProtocolConversions.RangeToTextSpan(Range range, SourceText text) in /_/src/Features/LanguageServer/Protocol/Extensions/ProtocolConversions.cs:line 300
   at Microsoft.CodeAnalysis.LanguageServer.Handler.SemanticTokens.SemanticTokensHelpers.ComputeSemanticTokensDataAsync(ClientCapabilities capabilities, Document document, Range[] ranges, ClassificationOptions options, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Protocol/Handler/SemanticTokens/SemanticTokensHelpers.cs:line 104
   at Microsoft.CodeAnalysis.LanguageServer.Handler.SemanticTokens.SemanticTokensHelpers.HandleRequestHelperAsync(IGlobalOptionService globalOptions, SemanticTokensRefreshQueue semanticTokensRefreshQueue, Range[] ranges, RequestContext context, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Protocol/Handler/SemanticTokens/SemanticTokensHelpers.cs:line 64
   at Microsoft.CodeAnalysis.LanguageServer.Handler.SemanticTokens.SemanticTokensRangeHandler.HandleRequestAsync(SemanticTokensRangeParams request, RequestContext context, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Protocol/Handler/SemanticTokens/SemanticTokensRangeHandler.cs:line 47
   at Microsoft.CommonLanguageServerProtocol.Framework.QueueItem`3.StartRequestAsync(TRequestContext context, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Microsoft.CommonLanguageServerProtocol.Framework/QueueItem.cs:line 176
[Error - 10:55:07 AM] Request textDocument/semanticTokens/range failed.
  Message: Range={ Start={ Line=140, Character=0 }, End={ Line=1043, Character=0 } }. text.Length=39. text.Lines.Count=3
  Code: -32000 
[object Object]
[Error - 10:55:07 AM] [LanguageServerHost] System.ArgumentException: Range={ Start={ Line=988, Character=33 }, End={ Line=988, Character=33 } }. text.Length=39. text.Lines.Count=3
 ---> System.ArgumentOutOfRangeException: The requested line number 988 must be less than the number of lines 3. (Parameter 'Line')
   at Microsoft.CodeAnalysis.Text.TextLineCollection.GetPosition(LinePosition position) in /_/src/Compilers/Core/Portable/Text/TextLineCollection.cs:line 67
   at Microsoft.CodeAnalysis.Text.TextLineCollection.GetTextSpan(LinePositionSpan span) in /_/src/Compilers/Core/Portable/Text/TextLineCollection.cs:line 78
   at Microsoft.CodeAnalysis.LanguageServer.ProtocolConversions.RangeToTextSpan(Range range, SourceText text) in /_/src/Features/LanguageServer/Protocol/Extensions/ProtocolConversions.cs:line 300
   --- End of inner exception stack trace ---
   at Microsoft.CodeAnalysis.LanguageServer.ProtocolConversions.RangeToTextSpan(Range range, SourceText text) in /_/src/Features/LanguageServer/Protocol/Extensions/ProtocolConversions.cs:line 300
   at Microsoft.CodeAnalysis.LanguageServer.Handler.CodeActions.CodeActionHelpers.GetActionSetsAsync(Document document, CodeActionOptionsProvider fallbackOptions, ICodeFixService codeFixService, ICodeRefactoringService codeRefactoringService, Range selection, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Protocol/Handler/CodeActions/CodeActionHelpers.cs:line 417
   at Microsoft.CodeAnalysis.LanguageServer.Handler.CodeActions.CodeActionHelpers.GetVSCodeActionsAsync(CodeActionParams request, Document document, CodeActionOptionsProvider fallbackOptions, ICodeFixService codeFixService, ICodeRefactoringService codeRefactoringService, Boolean hasVsLspCapability, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Protocol/Handler/CodeActions/CodeActionHelpers.cs:line 93
   at Microsoft.CodeAnalysis.LanguageServer.Handler.CodeActionsHandler.HandleRequestAsync(CodeActionParams request, RequestContext context, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Protocol/Handler/CodeActions/CodeActionsHandler.cs:line 67
   at Microsoft.CommonLanguageServerProtocol.Framework.QueueItem`3.StartRequestAsync(TRequestContext context, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Microsoft.CommonLanguageServerProtocol.Framework/QueueItem.cs:line 176
[Error - 10:55:07 AM] [LanguageServerHost] System.ArgumentException: Range={ Start={ Line=140, Character=0 }, End={ Line=1043, Character=0 } }. text.Length=74. text.Lines.Count=4
 ---> System.ArgumentOutOfRangeException: The requested line number 140 must be less than the number of lines 4. (Parameter 'Line')
   at Microsoft.CodeAnalysis.Text.TextLineCollection.GetPosition(LinePosition position) in /_/src/Compilers/Core/Portable/Text/TextLineCollection.cs:line 67
   at Microsoft.CodeAnalysis.Text.TextLineCollection.GetTextSpan(LinePositionSpan span) in /_/src/Compilers/Core/Portable/Text/TextLineCollection.cs:line 78
   at Microsoft.CodeAnalysis.LanguageServer.ProtocolConversions.RangeToTextSpan(Range range, SourceText text) in /_/src/Features/LanguageServer/Protocol/Extensions/ProtocolConversions.cs:line 300
   --- End of inner exception stack trace ---
   at Microsoft.CodeAnalysis.LanguageServer.ProtocolConversions.RangeToTextSpan(Range range, SourceText text) in /_/src/Features/LanguageServer/Protocol/Extensions/ProtocolConversions.cs:line 300
   at Microsoft.CodeAnalysis.LanguageServer.Handler.SemanticTokens.SemanticTokensHelpers.ComputeSemanticTokensDataAsync(ClientCapabilities capabilities, Document document, Range[] ranges, ClassificationOptions options, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Protocol/Handler/SemanticTokens/SemanticTokensHelpers.cs:line 104
   at Microsoft.CodeAnalysis.LanguageServer.Handler.SemanticTokens.SemanticTokensHelpers.HandleRequestHelperAsync(IGlobalOptionService globalOptions, SemanticTokensRefreshQueue semanticTokensRefreshQueue, Range[] ranges, RequestContext context, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Protocol/Handler/SemanticTokens/SemanticTokensHelpers.cs:line 64
   at Microsoft.CodeAnalysis.LanguageServer.Handler.SemanticTokens.SemanticTokensRangeHandler.HandleRequestAsync(SemanticTokensRangeParams request, RequestContext context, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Protocol/Handler/SemanticTokens/SemanticTokensRangeHandler.cs:line 47
   at Microsoft.CommonLanguageServerProtocol.Framework.QueueItem`3.StartRequestAsync(TRequestContext context, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Microsoft.CommonLanguageServerProtocol.Framework/QueueItem.cs:line 176
[Error - 10:55:07 AM] Request textDocument/semanticTokens/range failed.
  Message: Range={ Start={ Line=140, Character=0 }, End={ Line=1043, Character=0 } }. text.Length=74. text.Lines.Count=4
  Code: -32000 
[object Object]
[Error - 10:55:07 AM] [LanguageServerHost] System.ArgumentException: Range={ Start={ Line=988, Character=34 }, End={ Line=988, Character=34 } }. text.Length=74. text.Lines.Count=4
 ---> System.ArgumentOutOfRangeException: The requested line number 988 must be less than the number of lines 4. (Parameter 'Line')
   at Microsoft.CodeAnalysis.Text.TextLineCollection.GetPosition(LinePosition position) in /_/src/Compilers/Core/Portable/Text/TextLineCollection.cs:line 67
   at Microsoft.CodeAnalysis.Text.TextLineCollection.GetTextSpan(LinePositionSpan span) in /_/src/Compilers/Core/Portable/Text/TextLineCollection.cs:line 78
   at Microsoft.CodeAnalysis.LanguageServer.ProtocolConversions.RangeToTextSpan(Range range, SourceText text) in /_/src/Features/LanguageServer/Protocol/Extensions/ProtocolConversions.cs:line 300
   --- End of inner exception stack trace ---
   at Microsoft.CodeAnalysis.LanguageServer.ProtocolConversions.RangeToTextSpan(Range range, SourceText text) in /_/src/Features/LanguageServer/Protocol/Extensions/ProtocolConversions.cs:line 300
   at Microsoft.CodeAnalysis.LanguageServer.Handler.CodeActions.CodeActionHelpers.GetActionSetsAsync(Document document, CodeActionOptionsProvider fallbackOptions, ICodeFixService codeFixService, ICodeRefactoringService codeRefactoringService, Range selection, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Protocol/Handler/CodeActions/CodeActionHelpers.cs:line 417
   at Microsoft.CodeAnalysis.LanguageServer.Handler.CodeActions.CodeActionHelpers.GetVSCodeActionsAsync(CodeActionParams request, Document document, CodeActionOptionsProvider fallbackOptions, ICodeFixService codeFixService, ICodeRefactoringService codeRefactoringService, Boolean hasVsLspCapability, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Protocol/Handler/CodeActions/CodeActionHelpers.cs:line 93
   at Microsoft.CodeAnalysis.LanguageServer.Handler.CodeActionsHandler.HandleRequestAsync(CodeActionParams request, RequestContext context, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Protocol/Handler/CodeActions/CodeActionsHandler.cs:line 67
   at Microsoft.CommonLanguageServerProtocol.Framework.QueueItem`3.StartRequestAsync(TRequestContext context, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Microsoft.CommonLanguageServerProtocol.Framework/QueueItem.cs:line 176
[Error - 10:55:13 AM] [LanguageServerHost] System.ArgumentException: Range={ Start={ Line=395, Character=33 }, End={ Line=1043, Character=0 } }. text.Length=74. text.Lines.Count=4
 ---> System.ArgumentOutOfRangeException: The requested line number 395 must be less than the number of lines 4. (Parameter 'Line')
   at Microsoft.CodeAnalysis.Text.TextLineCollection.GetPosition(LinePosition position) in /_/src/Compilers/Core/Portable/Text/TextLineCollection.cs:line 67
   at Microsoft.CodeAnalysis.Text.TextLineCollection.GetTextSpan(LinePositionSpan span) in /_/src/Compilers/Core/Portable/Text/TextLineCollection.cs:line 78
   at Microsoft.CodeAnalysis.LanguageServer.ProtocolConversions.RangeToTextSpan(Range range, SourceText text) in /_/src/Features/LanguageServer/Protocol/Extensions/ProtocolConversions.cs:line 300
   --- End of inner exception stack trace ---
   at Microsoft.CodeAnalysis.LanguageServer.ProtocolConversions.RangeToTextSpan(Range range, SourceText text) in /_/src/Features/LanguageServer/Protocol/Extensions/ProtocolConversions.cs:line 300
   at Microsoft.CodeAnalysis.LanguageServer.Handler.SemanticTokens.SemanticTokensHelpers.ComputeSemanticTokensDataAsync(ClientCapabilities capabilities, Document document, Range[] ranges, ClassificationOptions options, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Protocol/Handler/SemanticTokens/SemanticTokensHelpers.cs:line 104
   at Microsoft.CodeAnalysis.LanguageServer.Handler.SemanticTokens.SemanticTokensHelpers.HandleRequestHelperAsync(IGlobalOptionService globalOptions, SemanticTokensRefreshQueue semanticTokensRefreshQueue, Range[] ranges, RequestContext context, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Protocol/Handler/SemanticTokens/SemanticTokensHelpers.cs:line 64
   at Microsoft.CodeAnalysis.LanguageServer.Handler.SemanticTokens.SemanticTokensRangeHandler.HandleRequestAsync(SemanticTokensRangeParams request, RequestContext context, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Protocol/Handler/SemanticTokens/SemanticTokensRangeHandler.cs:line 47
   at Microsoft.CommonLanguageServerProtocol.Framework.QueueItem`3.StartRequestAsync(TRequestContext context, CancellationToken cancellationToken) in /_/src/Features/LanguageServer/Microsoft.CommonLanguageServerProtocol.Framework/QueueItem.cs:line 176
[Error - 10:55:13 AM] Request textDocument/semanticTokens/range failed.
  Message: Range={ Start={ Line=395, Character=33 }, End={ Line=1043, Character=0 } }. text.Length=74. text.Lines.Count=4
  Code: -32000 

[dibarbet]

@tthiery that issue is tracked here on the Razor side - dotnet/razor#9637
cc @davidwengier

[tthiery]

Sounds good to have found the right place. Does this other issue also cover the bad formatting and the other issues of the original issue here?

[dibarbet]

@tthiery please file new issues with details for specific problems - this issue is fairly old and applies to O# (not necessarily the new version).