Server process seems to be restarted when unsupported files are in a C# project

[emmenlau]

Type: Bug

Issue Description

I see in the C# extension log the following errors:

[Error - 2:19:09 PM] [LanguageServerHost] System.InvalidOperationException: Unsupported extension '.i' and LSP language id ''
   at Microsoft.CodeAnalysis.LanguageServer.LanguageInfoProvider.GetLanguageInformation(String documentPath, String lspLanguageId) in /_/src/LanguageServer/Protocol/LanguageInfoProvider.cs:line 63
   at Microsoft.CodeAnalysis.LanguageServer.RoslynLanguageServer.GetLanguageForRequest(String methodName, Object serializedParameters) in /_/src/LanguageServer/Protocol/RoslynLanguageServer.cs:line 169
   at Microsoft.CommonLanguageServerProtocol.Framework.RequestExecutionQueue`1.ProcessQueueAsync()
[Info  - 2:19:09 PM] Error processing queue, shutting down
[Error - 2:19:09 PM] Workspace diagnostic pull failed.
Canceled: Canceled
    at a.handleFailedRequest (/home/memmenlauer/.vscode/extensions/ms-dotnettools.csharp-2.50.27-linux-x64/dist/extension.js:2:2125365)
    at a.handleFailedRequest (/home/memmenlauer/.vscode/extensions/ms-dotnettools.csharp-2.50.27-linux-x64/dist/extension.js:2:1163022)
    at /home/memmenlauer/.vscode/extensions/ms-dotnettools.csharp-2.50.27-linux-x64/dist/extension.js:2:2162775
    at runNextTicks (node:internal/process/task_queues:60:5)
    at processImmediate (node:internal/timers:454:9)
    at g.pullWorkspaceAsync (/home/memmenlauer/.vscode/extensions/ms-dotnettools.csharp-2.50.27-linux-x64/dist/extension.js:2:2160083)
[Error - 2:19:09 PM] Workspace diagnostic pull failed.
Canceled: Canceled
    at a.handleFailedRequest (/home/memmenlauer/.vscode/extensions/ms-dotnettools.csharp-2.50.27-linux-x64/dist/extension.js:2:2125365)
    at a.handleFailedRequest (/home/memmenlauer/.vscode/extensions/ms-dotnettools.csharp-2.50.27-linux-x64/dist/extension.js:2:1163022)
    at /home/memmenlauer/.vscode/extensions/ms-dotnettools.csharp-2.50.27-linux-x64/dist/extension.js:2:2162775
    at g.pullWorkspaceAsync (/home/memmenlauer/.vscode/extensions/ms-dotnettools.csharp-2.50.27-linux-x64/dist/extension.js:2:2160083)
[Info  - 2:19:09 PM] Connection to server got closed. Server will restart.
true
Using dotnet configured on PATH
Dotnet path: /usr/lib/dotnet/dotnet
Activating C# + C# Dev Kit...
waiting for named pipe information from server...
[stdout] {"pipeName":"/tmp/b6a0054e.sock"}
received named pipe information from server
attempting to connect client to server...
client has connected to server

Steps to Reproduce

I think the error is coming because I have a C++ / C# mixed project, that uses SWIG bindings in *.i files. Could this be the *.i files that are mentioned in the error message?

Expected Behavior

The server should not need to restart.

Actual Behavior

The server seems to restart.

Logs

C# log

See above.

C# LSP Trace Logs

Extension vscode.bat does not contribute csharpExtensionLoadPaths
Extension vscode.clojure does not contribute csharpExtensionLoadPaths
Extension vscode.coffeescript does not contribute csharpExtensionLoadPaths
Extension vscode.configuration-editing does not contribute csharpExtensionLoadPaths
Extension vscode.cpp does not contribute csharpExtensionLoadPaths
Extension vscode.csharp does not contribute csharpExtensionLoadPaths
Extension vscode.css does not contribute csharpExtensionLoadPaths
Extension vscode.css-language-features does not contribute csharpExtensionLoadPaths
Extension vscode.dart does not contribute csharpExtensionLoadPaths
Extension vscode.debug-auto-launch does not contribute csharpExtensionLoadPaths
Extension vscode.debug-server-ready does not contribute csharpExtensionLoadPaths
Extension vscode.diff does not contribute csharpExtensionLoadPaths
Extension vscode.docker does not contribute csharpExtensionLoadPaths
Extension vscode.emmet does not contribute csharpExtensionLoadPaths
Extension vscode.extension-editing does not contribute csharpExtensionLoadPaths
Extension vscode.fsharp does not contribute csharpExtensionLoadPaths
Extension vscode.git does not contribute csharpExtensionLoadPaths
Extension vscode.git-base does not contribute csharpExtensionLoadPaths
Extension vscode.github does not contribute csharpExtensionLoadPaths
Extension vscode.github-authentication does not contribute csharpExtensionLoadPaths
Extension vscode.go does not contribute csharpExtensionLoadPaths
Extension vscode.groovy does not contribute csharpExtensionLoadPaths
Extension vscode.grunt does not contribute csharpExtensionLoadPaths
Extension vscode.gulp does not contribute csharpExtensionLoadPaths
Extension vscode.handlebars does not contribute csharpExtensionLoadPaths
Extension vscode.hlsl does not contribute csharpExtensionLoadPaths
Extension vscode.html does not contribute csharpExtensionLoadPaths
Extension vscode.html-language-features does not contribute csharpExtensionLoadPaths
Extension vscode.ini does not contribute csharpExtensionLoadPaths
Extension vscode.ipynb does not contribute csharpExtensionLoadPaths
Extension vscode.jake does not contribute csharpExtensionLoadPaths
Extension vscode.java does not contribute csharpExtensionLoadPaths
Extension vscode.javascript does not contribute csharpExtensionLoadPaths
Extension vscode.json does not contribute csharpExtensionLoadPaths
Extension vscode.json-language-features does not contribute csharpExtensionLoadPaths
Extension vscode.julia does not contribute csharpExtensionLoadPaths
Extension vscode.latex does not contribute csharpExtensionLoadPaths
Extension vscode.less does not contribute csharpExtensionLoadPaths
Extension vscode.log does not contribute csharpExtensionLoadPaths
Extension vscode.lua does not contribute csharpExtensionLoadPaths
Extension vscode.make does not contribute csharpExtensionLoadPaths
Extension vscode.markdown does not contribute csharpExtensionLoadPaths
Extension vscode.markdown-language-features does not contribute csharpExtensionLoadPaths
Extension vscode.markdown-math does not contribute csharpExtensionLoadPaths
Extension vscode.media-preview does not contribute csharpExtensionLoadPaths
Extension vscode.merge-conflict does not contribute csharpExtensionLoadPaths
Extension vscode.microsoft-authentication does not contribute csharpExtensionLoadPaths
Extension ms-vscode.js-debug does not contribute csharpExtensionLoadPaths
Extension ms-vscode.js-debug-companion does not contribute csharpExtensionLoadPaths
Extension ms-vscode.vscode-js-profile-table does not contribute csharpExtensionLoadPaths
Extension vscode.builtin-notebook-renderers does not contribute csharpExtensionLoadPaths
Extension vscode.npm does not contribute csharpExtensionLoadPaths
Extension vscode.objective-c does not contribute csharpExtensionLoadPaths
Extension vscode.perl does not contribute csharpExtensionLoadPaths
Extension vscode.php does not contribute csharpExtensionLoadPaths
Extension vscode.php-language-features does not contribute csharpExtensionLoadPaths
Extension vscode.powershell does not contribute csharpExtensionLoadPaths
Extension vscode.pug does not contribute csharpExtensionLoadPaths
Extension vscode.python does not contribute csharpExtensionLoadPaths
Extension vscode.r does not contribute csharpExtensionLoadPaths
Extension vscode.razor does not contribute csharpExtensionLoadPaths
Extension vscode.references-view does not contribute csharpExtensionLoadPaths
Extension vscode.restructuredtext does not contribute csharpExtensionLoadPaths
Extension vscode.ruby does not contribute csharpExtensionLoadPaths
Extension vscode.rust does not contribute csharpExtensionLoadPaths
Extension vscode.scss does not contribute csharpExtensionLoadPaths
Extension vscode.search-result does not contribute csharpExtensionLoadPaths
Extension vscode.shaderlab does not contribute csharpExtensionLoadPaths
Extension vscode.shellscript does not contribute csharpExtensionLoadPaths
Extension vscode.simple-browser does not contribute csharpExtensionLoadPaths
Extension vscode.sql does not contribute csharpExtensionLoadPaths
Extension vscode.swift does not contribute csharpExtensionLoadPaths
Extension vscode.theme-abyss does not contribute csharpExtensionLoadPaths
Extension vscode.theme-defaults does not contribute csharpExtensionLoadPaths
Extension vscode.theme-kimbie-dark does not contribute csharpExtensionLoadPaths
Extension vscode.theme-monokai does not contribute csharpExtensionLoadPaths
Extension vscode.theme-monokai-dimmed does not contribute csharpExtensionLoadPaths
Extension vscode.theme-quietlight does not contribute csharpExtensionLoadPaths
Extension vscode.theme-red does not contribute csharpExtensionLoadPaths
Extension vscode.vscode-theme-seti does not contribute csharpExtensionLoadPaths
Extension vscode.theme-solarized-dark does not contribute csharpExtensionLoadPaths
Extension vscode.theme-solarized-light does not contribute csharpExtensionLoadPaths
Extension vscode.theme-tomorrow-night-blue does not contribute csharpExtensionLoadPaths
Extension vscode.tunnel-forwarding does not contribute csharpExtensionLoadPaths
Extension vscode.typescript does not contribute csharpExtensionLoadPaths
Extension vscode.typescript-language-features does not contribute csharpExtensionLoadPaths
Extension vscode.vb does not contribute csharpExtensionLoadPaths
Extension vscode.xml does not contribute csharpExtensionLoadPaths
Extension vscode.yaml does not contribute csharpExtensionLoadPaths
Extension alefragnani.project-manager does not contribute csharpExtensionLoadPaths
Extension Delgan.qml-format does not contribute csharpExtensionLoadPaths
Extension DotJoshJohnson.xml does not contribute csharpExtensionLoadPaths
Extension eamodio.gitlens does not contribute csharpExtensionLoadPaths
Extension felgo.felgo does not contribute csharpExtensionLoadPaths
Extension foxundermoon.shell-format does not contribute csharpExtensionLoadPaths
Extension GitHub.copilot does not contribute csharpExtensionLoadPaths
Extension GitHub.copilot-chat does not contribute csharpExtensionLoadPaths
Extension GitHub.vscode-pull-request-github does not contribute csharpExtensionLoadPaths
Extension GitLab.gitlab-workflow does not contribute csharpExtensionLoadPaths
Extension hbenl.vscode-test-explorer does not contribute csharpExtensionLoadPaths
Extension IBM.output-colorizer does not contribute csharpExtensionLoadPaths
Extension jeff-hykin.better-cpp-syntax does not contribute csharpExtensionLoadPaths
Extension knv.qt6renderer does not contribute csharpExtensionLoadPaths
Extension llvm-vs-code-extensions.vscode-clangd does not contribute csharpExtensionLoadPaths
Extension matepek.vscode-catch2-test-adapter does not contribute csharpExtensionLoadPaths
Extension ms-azuretools.vscode-docker does not contribute csharpExtensionLoadPaths
Extension ms-dotnettools.csdevkit does not contribute csharpExtensionLoadPaths
Extension ms-dotnettools.csharp does not contribute csharpExtensionLoadPaths
Extension ms-dotnettools.vscode-dotnet-runtime does not contribute csharpExtensionLoadPaths
Extension ms-python.debugpy does not contribute csharpExtensionLoadPaths
Extension ms-python.python does not contribute csharpExtensionLoadPaths
Extension ms-python.vscode-pylance does not contribute csharpExtensionLoadPaths
Extension ms-toolsai.jupyter-keymap does not contribute csharpExtensionLoadPaths
Extension ms-vscode-remote.remote-containers does not contribute csharpExtensionLoadPaths
Extension ms-vscode-remote.remote-ssh does not contribute csharpExtensionLoadPaths
Extension ms-vscode-remote.remote-ssh-edit does not contribute csharpExtensionLoadPaths
Extension ms-vscode.cmake-tools does not contribute csharpExtensionLoadPaths
Extension ms-vscode.cpptools does not contribute csharpExtensionLoadPaths
Extension ms-vscode.hexeditor does not contribute csharpExtensionLoadPaths
Extension ms-vscode.powershell does not contribute csharpExtensionLoadPaths
Extension ms-vscode.remote-explorer does not contribute csharpExtensionLoadPaths
Extension ms-vscode.test-adapter-converter does not contribute csharpExtensionLoadPaths
Extension redhat.vscode-yaml does not contribute csharpExtensionLoadPaths
Extension stkb.rewrap does not contribute csharpExtensionLoadPaths
Extension streetsidesoftware.code-spell-checker does not contribute csharpExtensionLoadPaths
Extension streetsidesoftware.code-spell-checker-german does not contribute csharpExtensionLoadPaths
Extension timonwong.shellcheck does not contribute csharpExtensionLoadPaths
Extension vadimcn.vscode-lldb does not contribute csharpExtensionLoadPaths
Extension yzhang.markdown-all-in-one does not contribute csharpExtensionLoadPaths
Extension zhangciwu.swig-tpl does not contribute csharpExtensionLoadPaths

Environment information

VSCode version: 1.94.2
C# Extension: 2.50.27
Using OmniSharp: false

Dotnet Information

.NET SDK: Version: 8.0.403 Commit: c64aa40a71 Workload version: 8.0.400-manifests.18f19b92 MSBuild version: 17.11.9+a69bbaaf5

Runtime Environment:
OS Name: ubuntu
OS Version: 24.04
OS Platform: Linux
RID: linux-x64
Base Path: /usr/lib/dotnet/sdk/8.0.403/

.NET workloads installed:
Configured to use loose manifests when installing new manifests.
There are no installed workloads to display.

Host:
Version: 8.0.10
Architecture: x64
Commit: 81cabf2857

.NET SDKs installed:
8.0.403 [/usr/lib/dotnet/sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 8.0.10 [/usr/lib/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 8.0.10 [/usr/lib/dotnet/shared/Microsoft.NETCore.App]

Other architectures found:
None

Environment variables:
Not set

global.json file:
Not found

Learn more:
https://aka.ms/dotnet/info

Download .NET:
https://aka.ms/dotnet/download

Visual Studio Code Extensions

Extension	Author	Version	Folder Name
better-cpp-syntax	jeff-hykin	1.27.1	jeff-hykin.better-cpp-syntax-1.27.1
cmake-tools	ms-vscode	1.19.52	ms-vscode.cmake-tools-1.19.52
code-spell-checker	streetsidesoftware	3.0.1	streetsidesoftware.code-spell-checker-3.0.1
code-spell-checker-german	streetsidesoftware	2.3.2	streetsidesoftware.code-spell-checker-german-2.3.2
copilot	GitHub	1.241.0	github.copilot-1.241.0
copilot-chat	GitHub	0.21.2	github.copilot-chat-0.21.2
cpptools	ms-vscode	1.22.10	ms-vscode.cpptools-1.22.10-linux-x64
csdevkit	ms-dotnettools	1.11.14	ms-dotnettools.csdevkit-1.11.14-linux-x64
csharp	ms-dotnettools	2.50.27	ms-dotnettools.csharp-2.50.27-linux-x64
debugpy	ms-python	2024.12.0	ms-python.debugpy-2024.12.0-linux-x64
felgo	felgo	2.0.1	felgo.felgo-2.0.1
gitlab-workflow	GitLab	5.16.0	gitlab.gitlab-workflow-5.16.0
gitlens	eamodio	15.6.2	eamodio.gitlens-15.6.2
hexeditor	ms-vscode	1.10.0	ms-vscode.hexeditor-1.10.0
jupyter-keymap	ms-toolsai	1.1.2	ms-toolsai.jupyter-keymap-1.1.2
markdown-all-in-one	yzhang	3.6.2	yzhang.markdown-all-in-one-3.6.2
output-colorizer	IBM	0.1.2	ibm.output-colorizer-0.1.2
powershell	ms-vscode	2024.2.2	ms-vscode.powershell-2024.2.2
project-manager	alefragnani	12.8.0	alefragnani.project-manager-12.8.0
python	ms-python	2024.16.1	ms-python.python-2024.16.1-linux-x64
qml-format	Delgan	1.0.4	delgan.qml-format-1.0.4
qt6renderer	knv	1.0.0	knv.qt6renderer-1.0.0
remote-containers	ms-vscode-remote	0.388.0	ms-vscode-remote.remote-containers-0.388.0
remote-explorer	ms-vscode	0.4.3	ms-vscode.remote-explorer-0.4.3
remote-ssh	ms-vscode-remote	0.115.0	ms-vscode-remote.remote-ssh-0.115.0
remote-ssh-edit	ms-vscode-remote	0.87.0	ms-vscode-remote.remote-ssh-edit-0.87.0
rewrap	stkb	1.16.3	stkb.rewrap-1.16.3
shell-format	foxundermoon	7.2.5	foxundermoon.shell-format-7.2.5
shellcheck	timonwong	0.37.1	timonwong.shellcheck-0.37.1-linux-x64
swig-tpl	zhangciwu	0.0.6	zhangciwu.swig-tpl-0.0.6
test-adapter-converter	ms-vscode	0.2.0	ms-vscode.test-adapter-converter-0.2.0
vscode-catch2-test-adapter	matepek	4.12.2	matepek.vscode-catch2-test-adapter-4.12.2
vscode-clangd	llvm-vs-code-extensions	0.1.29	llvm-vs-code-extensions.vscode-clangd-0.1.29
vscode-docker	ms-azuretools	1.29.3	ms-azuretools.vscode-docker-1.29.3
vscode-dotnet-runtime	ms-dotnettools	2.2.0	ms-dotnettools.vscode-dotnet-runtime-2.2.0
vscode-lldb	vadimcn	1.11.0	vadimcn.vscode-lldb-1.11.0-linux-x64
vscode-pull-request-github	GitHub	0.98.0	github.vscode-pull-request-github-0.98.0
vscode-pylance	ms-python	2024.10.1	ms-python.vscode-pylance-2024.10.1
vscode-test-explorer	hbenl	2.22.1	hbenl.vscode-test-explorer-2.22.1
vscode-yaml	redhat	1.15.0	redhat.vscode-yaml-1.15.0
xml	DotJoshJohnson	2.5.1	dotjoshjohnson.xml-2.5.1

Extension version: 2.50.27
VS Code version: Code 1.94.2 (384ff7382de624fb94dbaf6da11977bba1ecd427, 2024-10-09T16:08:44.566Z)
OS version: Linux x64 6.8.0-47-generic
Modes:

System Info

Item	Value
CPUs	AMD Ryzen 7 PRO 4750U with Radeon Graphics (16 x 1330)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: enabled_on direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off video_decode: enabled video_encode: disabled_software vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: disabled_off webnn: disabled_off
Load (avg)	1, 1, 1
Memory (System)	30.58GB (20.65GB free)
Process Argv	BDAImageAcquire.code-workspace
Screen Reader	no
VM	0%
DESKTOP_SESSION	ubuntu
XDG_CURRENT_DESKTOP	Unity
XDG_SESSION_DESKTOP	ubuntu
XDG_SESSION_TYPE	x11

[dibarbet]

@emmenlau what language does VSCode say the .i files are? In the bottom right bar:

Additionally, we fixed an issue with similar symptoms in 2.53.17 (prerelease), would be curious if that helps your issue

Otherwise, if you're able to collect the 'C# LSP Trace Logs' with dotnet.server.trace set to `Trace (see https://github.com/dotnet/vscode-csharp/blob/main/SUPPORT.md#collecting-general-logs) it should tell us exactly which file is causing the problem.