VScode Avalonia XAML autocompletion doesn't work

Question

VScode Avalonia XAML autocompletion doesn't work

Opened this issue a year ago · 29 comments

RegreTTO commented a year ago

Describe the bug

After triggering autocomplete it doesn't work and throws errors in "Avalonia Client" log section in VScode

To Reproduce

Steps to reproduce the behavior:

Create new project with dotnet new install Avalonia.Templates
Go to .axaml
Click on "<" for example
See error

Expected behavior

I get autocompletion

Environment

OS: Arch Linux
Avalonia-Version: 11.0.6
Avalonia VScode extension version: 0.0.31

Additional context

Error itself

2024-02-13 20:07:23.837 [info] [Trace - 20:07:23] Sending notification 'textDocument/didChange'.
2024-02-13 20:07:23.843 [info] [Trace - 20:07:23] Sending request 'textDocument/completion - (2)'.
2024-02-13 20:07:23.853 [info] [Trace - 20:07:23] Received notification 'window/logMessage'.
2024-02-13 20:07:23.853 [info] [Error - 20:07:23] OmniSharp.Extensions.JsonRpc.DefaultRequestInvoker: Failed to handle request textDocument/completion 2 - System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at AvaloniaLanguageServer.Services.Buffer.GetTextTillLine(Position position) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Services/Buffer.cs:line 8
   at AvaloniaLanguageServer.Services.BufferService.GetTextTillPosition(DocumentUri key, Position position) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Services/BufferService.cs:line 22
   at AvaloniaLanguageServer.Handlers.CompletionHandler.Handle(CompletionParams request, CancellationToken cancellationToken) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Handlers/CompletionHandler.cs:line 29
   at OmniSharp.Extensions.LanguageServer.Server.Pipelines.SemanticTokensDeltaPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at OmniSharp.Extensions.LanguageServer.Server.Pipelines.ResolveCommandPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPreProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPostProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.g__InnerRoute|7_0(IServiceScopeFactory serviceScopeFactory, Request request, TDescriptor descriptor, Object params, CancellationToken token, ILogger logger)
   at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.RouteRequest(IRequestDescriptor`1 descriptors, Request request, CancellationToken token)
   at OmniSharp.Extensions.JsonRpc.DefaultRequestInvoker.<>c__DisplayClass10_0.<b__5>d.MoveNext() | Method='textDocument/completion' RequestId='2'
2024-02-13 20:07:23.854 [info] [Trace - 20:07:23] Received response 'textDocument/completion - (2)' in 11ms. Request failed: Internal Error - System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at AvaloniaLanguageServer.Services.Buffer.GetTextTillLine(Position position) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Services/Buffer.cs:line 8
   at AvaloniaLanguageServer.Services.BufferService.GetTextTillPosition(DocumentUri key, Position position) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Services/BufferService.cs:line 22
   at AvaloniaLanguageServer.Handlers.CompletionHandler.Handle(CompletionParams request, CancellationToken cancellationToken) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Handlers/CompletionHandler.cs:line 29
   at OmniSharp.Extensions.LanguageServer.Server.Pipelines.SemanticTokensDeltaPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at OmniSharp.Extensions.LanguageServer.Server.Pipelines.ResolveCommandPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPreProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPostProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.g__InnerRoute|7_0(IServiceScopeFactory serviceScopeFactory, Request request, TDescriptor descriptor, Object params, CancellationToken token, ILogger logger)
   at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.RouteRequest(IRequestDescriptor`1 descriptors, Request request, CancellationToken token)
   at OmniSharp.Extensions.JsonRpc.DefaultRequestInvoker.<>c__DisplayClass10_0.<b__5>d.MoveNext() (-32603).
2024-02-13 20:07:23.855 [info] [Error - 20:07:23] Request textDocument/completion failed.
2024-02-13 20:07:23.855 [info]   Message: Internal Error - System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at AvaloniaLanguageServer.Services.Buffer.GetTextTillLine(Position position) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Services/Buffer.cs:line 8
   at AvaloniaLanguageServer.Services.BufferService.GetTextTillPosition(DocumentUri key, Position position) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Services/BufferService.cs:line 22
   at AvaloniaLanguageServer.Handlers.CompletionHandler.Handle(CompletionParams request, CancellationToken cancellationToken) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Handlers/CompletionHandler.cs:line 29
   at OmniSharp.Extensions.LanguageServer.Server.Pipelines.SemanticTokensDeltaPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at OmniSharp.Extensions.LanguageServer.Server.Pipelines.ResolveCommandPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPreProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPostProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.g__InnerRoute|7_0(IServiceScopeFactory serviceScopeFactory, Request request, TDescriptor descriptor, Object params, CancellationToken token, ILogger logger)
   at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.RouteRequest(IRequestDescriptor`1 descriptors, Request request, CancellationToken token)
   at OmniSharp.Extensions.JsonRpc.DefaultRequestInvoker.<>c__DisplayClass10_0.<b__5>d.MoveNext()
  Code: -32603 
2024-02-13 20:07:24.854 [info] [Trace - 20:07:24] Sending notification 'textDocument/didSave'.
2024-02-13 20:07:24.856 [info] [Trace - 20:07:24] Received notification 'window/logMessage'.
2024-02-13 20:07:24.857 [info] [Info  - 20:07:24] AvaloniaLanguageServer.Handlers.TextDocumentSyncHandler: DidSaveTextDocumentParams OmniSharp.Extensions.LanguageServer.Protocol.Models.DidSaveTextDocumentParams | Request='OmniSharp.Extensions.LanguageServer.Protocol.Models.DidSaveTextDocumentParams'
2024-02-13 20:07:25.169 [info] [Trace - 20:07:25] Sending notification 'workspace/didChangeWatchedFiles'.

Answer 1 · 2024-02-13T18:05:34.000Z

@RegreTTO please make sure you have all the latest versions of the extension and Avalonia. If the issue persistets file a minimum repo.

Note: that the extension has its own repo where issues should be reported.

Answer 2 · 2024-02-14T06:18:54.000Z

@RegreTTO This is fixed in the version v0.0.30, could you confirm that you have latest version of the extension?

Answer 3 · 2024-02-14T14:44:48.000Z

@prashantvc Yes. I've checked the version right now and it is exactly v0.0.30

Answer 4 · 2024-02-14T15:19:32.000Z

@timunie It was the first time I installed all avalonia-related plugins, so they are exactly last version

Answer 5 · 2024-02-14T15:26:42.000Z

11.0.6 is outdated. 11.0.9 is recent.

Answer 6 · 2024-02-14T15:36:40.000Z

I installed it as said in the docs with dotnet new install Avalonia.Templates. I took version from my .csproj file.

Answer 7 · 2024-02-15T07:50:29.000Z

The templates were maybe not updated yet. They are not always in sync with latest minor version, so please try to update your nugets 🙏

Answer 8 · 2024-02-17T01:37:14.000Z

@timunie Hello!
How can I update my nugets? I tried

dotnet new install Avalonia.Templates::11.0.9

I got

Warning: Avalonia.Templates::11.0.9 is not found in NuGet feeds https://api.nuget.org/v3/index.json.
Avalonia.Templates::11.0.9 could not be installed, the package does not exist.

I also searched for the Avalonia.Templates and found that the latest version is 11.0.6.
https://www.nuget.org/packages?q=Avalonia.Templates

Answer 9 · 2024-02-17T01:51:23.000Z

I tried to update the package versions by manually changing the versions in .csproj file, and rebuild the project. However, the problem persists.

Answer 10 · 2024-02-17T01:54:32.000Z

I changed the extension to v0.0.29, and the problem has been resolved.

Answer 11 · 2024-02-17T16:49:10.000Z

Thanks, I'll try downgrading later

Answer 12 · 2024-02-18T08:13:04.000Z

@calee88 Indeed, downgrading fixes this problem

Answer 13 · 2024-02-18T10:32:52.000Z

Or not. After rebooting it started to infinitely ask me to build project, but nothing changes. It asks, I build, it asks again and so on

Answer 14 · 2024-02-18T10:38:16.000Z

@RegreTTO please upload a minimum sample for us to reproduce.

Answer 15 · 2024-02-18T10:52:42.000Z

@timunie There is no need me to upload such. It is just dotnet new avalonia.mvvm, nothing more

Answer 16 · 2024-02-27T00:14:53.000Z

I'm having the same issue 😓

Answer 17 · 2024-02-27T00:17:18.000Z

Interesting, if I downgrade the extension to the v0.0.29 it works 🤔

Edit: yeah, now I see that this was already proposed, then confirmed.

Answer 18 · 2024-03-05T15:38:33.000Z

I can confirm. Just follow Avalonia docs to reproduce this error. Avalonia.Templates::11.0.6 is the newest version available.

Might be related to this OmniSharp issue #2525 or #2550

2024-03-05 15:52:27.694 [info] [Trace - 15:52:27] Sending request 'textDocument/completion - (1)'.
2024-03-05 15:52:27.729 [info] [Trace - 15:52:27] Received notification 'window/logMessage'.
2024-03-05 15:52:27.729 [info] [Error - 15:52:27] OmniSharp.Extensions.JsonRpc.DefaultRequestInvoker: Failed to handle request textDocument/completion 1 - System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at AvaloniaLanguageServer.Services.Buffer.GetTextTillLine(Position position) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Services/Buffer.cs:line 8
   at AvaloniaLanguageServer.Services.BufferService.GetTextTillPosition(DocumentUri key, Position position) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Services/BufferService.cs:line 22
   at AvaloniaLanguageServer.Handlers.CompletionHandler.Handle(CompletionParams request, CancellationToken cancellationToken) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Handlers/CompletionHandler.cs:line 29
   at OmniSharp.Extensions.LanguageServer.Server.Pipelines.SemanticTokensDeltaPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at OmniSharp.Extensions.LanguageServer.Server.Pipelines.ResolveCommandPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPreProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPostProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.<RouteRequest>g__InnerRoute|7_0(IServiceScopeFactory serviceScopeFactory, Request request, TDescriptor descriptor, Object params, CancellationToken token, ILogger logger)
   at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.RouteRequest(IRequestDescriptor`1 descriptors, Request request, CancellationToken token)
   at OmniSharp.Extensions.JsonRpc.DefaultRequestInvoker.<>c__DisplayClass10_0.<<RouteRequest>b__5>d.MoveNext() | Method='textDocument/completion' RequestId='1'
2024-03-05 15:52:27.736 [info] [Trace - 15:52:27] Received response 'textDocument/completion - (1)' in 41ms. Request failed: Internal Error - System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at AvaloniaLanguageServer.Services.Buffer.GetTextTillLine(Position position) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Services/Buffer.cs:line 8
   at AvaloniaLanguageServer.Services.BufferService.GetTextTillPosition(DocumentUri key, Position position) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Services/BufferService.cs:line 22
   at AvaloniaLanguageServer.Handlers.CompletionHandler.Handle(CompletionParams request, CancellationToken cancellationToken) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Handlers/CompletionHandler.cs:line 29
   at OmniSharp.Extensions.LanguageServer.Server.Pipelines.SemanticTokensDeltaPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at OmniSharp.Extensions.LanguageServer.Server.Pipelines.ResolveCommandPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPreProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPostProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.<RouteRequest>g__InnerRoute|7_0(IServiceScopeFactory serviceScopeFactory, Request request, TDescriptor descriptor, Object params, CancellationToken token, ILogger logger)
   at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.RouteRequest(IRequestDescriptor`1 descriptors, Request request, CancellationToken token)
   at OmniSharp.Extensions.JsonRpc.DefaultRequestInvoker.<>c__DisplayClass10_0.<<RouteRequest>b__5>d.MoveNext() (-32603).
2024-03-05 15:52:27.736 [info] [Error - 15:52:27] Request textDocument/completion failed.
2024-03-05 15:52:27.736 [info]   Message: Internal Error - System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at AvaloniaLanguageServer.Services.Buffer.GetTextTillLine(Position position) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Services/Buffer.cs:line 8
   at AvaloniaLanguageServer.Services.BufferService.GetTextTillPosition(DocumentUri key, Position position) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Services/BufferService.cs:line 22
   at AvaloniaLanguageServer.Handlers.CompletionHandler.Handle(CompletionParams request, CancellationToken cancellationToken) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Handlers/CompletionHandler.cs:line 29
   at OmniSharp.Extensions.LanguageServer.Server.Pipelines.SemanticTokensDeltaPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at OmniSharp.Extensions.LanguageServer.Server.Pipelines.ResolveCommandPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPreProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPostProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.<RouteRequest>g__InnerRoute|7_0(IServiceScopeFactory serviceScopeFactory, Request request, TDescriptor descriptor, Object params, CancellationToken token, ILogger logger)
   at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.RouteRequest(IRequestDescriptor`1 descriptors, Request request, CancellationToken token)
   at OmniSharp.Extensions.JsonRpc.DefaultRequestInvoker.<>c__DisplayClass10_0.<<RouteRequest>b__5>d.MoveNext()
  Code: -32603

Answer 19 · 2024-03-05T20:47:18.000Z

I have the same problem, even after updating all the Avalonia packages in my project to 11.0.9 and with extension v0.0.31.

I'm running VS Code on Windows but connected to WSL.

Answer 20 · 2024-03-05T20:52:22.000Z

However, the same happens for a project opened from the Windows filesystem.

Answer 21 · 2024-03-28T08:11:26.000Z

@doxxx the WSL support is untested. Let me check this one windows

Answer 22 · 2024-05-18T12:41:51.000Z

I changed the extension to v0.0.29, and the problem has been resolved.

Same issue here. Installed the latest versions of Avalonia.Templates which is 11.0.11 at the time of writing and the Avalonia VS Code Extension in version 0.0.31. Downgraded to 0.0.29 resolved the issue.

I am working on Pop!OS Linux by System76. VS Code is installed via flatpak.

Steps to reproduce:

Install .NET 8 SDK
Install VS Code from Flatpak (latest version)
Install the Avalonia VS Code Extension (0.0.31 in my case, or 0.0.30 as stated in the comments above)
Install Avalonia.Templates
Create new MVVM Project dotnet new avalonia.mvvm
Open up the MainWindow.axaml file
Type a < somewhere in the document
Error message will pop up:

2024-05-18 14:33:05.639 [info] [Trace - 2:33:05 PM] Sending notification 'textDocument/didChange'.
2024-05-18 14:33:05.639 [info] [Trace - 2:33:05 PM] Sending request 'textDocument/completion - (1)'.
2024-05-18 14:33:05.674 [info] [Trace - 2:33:05 PM] Received notification 'window/logMessage'.
2024-05-18 14:33:05.674 [info] [Error - 2:33:05 PM] OmniSharp.Extensions.JsonRpc.DefaultRequestInvoker: Failed to handle request textDocument/completion 1 - System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at AvaloniaLanguageServer.Services.Buffer.GetTextTillLine(Position position) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Services/Buffer.cs:line 8
   at AvaloniaLanguageServer.Services.BufferService.GetTextTillPosition(DocumentUri key, Position position) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Services/BufferService.cs:line 22
   at AvaloniaLanguageServer.Handlers.CompletionHandler.Handle(CompletionParams request, CancellationToken cancellationToken) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Handlers/CompletionHandler.cs:line 29
   at OmniSharp.Extensions.LanguageServer.Server.Pipelines.SemanticTokensDeltaPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at OmniSharp.Extensions.LanguageServer.Server.Pipelines.ResolveCommandPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPreProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPostProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.<RouteRequest>g__InnerRoute|7_0(IServiceScopeFactory serviceScopeFactory, Request request, TDescriptor descriptor, Object params, CancellationToken token, ILogger logger)
   at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.RouteRequest(IRequestDescriptor`1 descriptors, Request request, CancellationToken token)
   at OmniSharp.Extensions.JsonRpc.DefaultRequestInvoker.<>c__DisplayClass10_0.<<RouteRequest>b__5>d.MoveNext() | Method='textDocument/completion' RequestId='1'
2024-05-18 14:33:05.679 [info] [Trace - 2:33:05 PM] Received response 'textDocument/completion - (1)' in 40ms. Request failed: Internal Error - System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at AvaloniaLanguageServer.Services.Buffer.GetTextTillLine(Position position) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Services/Buffer.cs:line 8
   at AvaloniaLanguageServer.Services.BufferService.GetTextTillPosition(DocumentUri key, Position position) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Services/BufferService.cs:line 22
   at AvaloniaLanguageServer.Handlers.CompletionHandler.Handle(CompletionParams request, CancellationToken cancellationToken) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Handlers/CompletionHandler.cs:line 29
   at OmniSharp.Extensions.LanguageServer.Server.Pipelines.SemanticTokensDeltaPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at OmniSharp.Extensions.LanguageServer.Server.Pipelines.ResolveCommandPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPreProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPostProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.<RouteRequest>g__InnerRoute|7_0(IServiceScopeFactory serviceScopeFactory, Request request, TDescriptor descriptor, Object params, CancellationToken token, ILogger logger)
   at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.RouteRequest(IRequestDescriptor`1 descriptors, Request request, CancellationToken token)
   at OmniSharp.Extensions.JsonRpc.DefaultRequestInvoker.<>c__DisplayClass10_0.<<RouteRequest>b__5>d.MoveNext() (-32603).
2024-05-18 14:33:05.680 [info] [Error - 2:33:05 PM] Request textDocument/completion failed.
2024-05-18 14:33:05.680 [info]   Message: Internal Error - System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at AvaloniaLanguageServer.Services.Buffer.GetTextTillLine(Position position) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Services/Buffer.cs:line 8
   at AvaloniaLanguageServer.Services.BufferService.GetTextTillPosition(DocumentUri key, Position position) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Services/BufferService.cs:line 22
   at AvaloniaLanguageServer.Handlers.CompletionHandler.Handle(CompletionParams request, CancellationToken cancellationToken) in /Users/prashantvc/Avalonia/src/AvaloniaLSP/AvaloniaLanguageServer/Handlers/CompletionHandler.cs:line 29
   at OmniSharp.Extensions.LanguageServer.Server.Pipelines.SemanticTokensDeltaPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at OmniSharp.Extensions.LanguageServer.Server.Pipelines.ResolveCommandPipeline`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPreProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPostProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.<RouteRequest>g__InnerRoute|7_0(IServiceScopeFactory serviceScopeFactory, Request request, TDescriptor descriptor, Object params, CancellationToken token, ILogger logger)
   at OmniSharp.Extensions.JsonRpc.RequestRouterBase`1.RouteRequest(IRequestDescriptor`1 descriptors, Request request, CancellationToken token)
   at OmniSharp.Extensions.JsonRpc.DefaultRequestInvoker.<>c__DisplayClass10_0.<<RouteRequest>b__5>d.MoveNext()
  Code: -32603

Answer 23 · 2024-07-05T13:58:34.000Z

If this helps anyone, 0.0.31 had issues. Downgrading to 0.0.29 resolved the issue.

Answer 24 · 2024-11-02T05:01:16.000Z

Can confirm that the issue is fixed in latest commits. But you have to build the latest AvaloniaLSP manually.

Answer 25 · 2024-11-26T00:03:59.000Z

@tmp64 how do I do that?

Answer 26 · 2024-11-26T05:02:46.000Z

@tmp64 how do I do that?

Clone this repo, build src/AvaloniaLSP (in Visual Studio or with dotnet build) and replace the original version in C:\Users\user.vscode\extensions\avaloniateam.vscode-avalonia-0.0.31\

Answer 27 · 2024-12-30T15:56:59.000Z

Please try the latest build and let me know if that resolves the issue?

Answer 28 · 2025-01-02T18:32:11.000Z

I can confirm that the latest version of the extension works for me. After I opened my demo project and tried to perform auto-completion, it popped up the selection list with just an option "Build the project". Selecting that option seemed to trigger a dotnet build, I think, but it wasn't clear exactly what it was doing. My suggestion here would be to execute the command in a terminal window so the user can see what's going on. After the build finished, auto-completion worked as expected.

After performing a dotnet clean, auto-completion prompted to build the project again as expected. If I manually performed a build, i.e. dotnet build in the terminal, then auto-completion begins working as expected.

Answer 29 · 2025-01-02T18:37:20.000Z

There's a few problems with the way this is currently implemented.

Selecting the "build the project" option in the completion list inserts a space into the active document. While not the end of the world, it would be nice to avoid this.
If there are build errors, the "build the project" option completes without any indication that there was an error. Auto-completions simply don't work after the build supposedly completes. You have to go to the Output window and select Avalonia Client from the dropdown to see that there were errors during the build.