Extension host is unresponsive while enabling C# extension

[adolfdaniel]

Type: Bug

I have the C# extension enabled on my VSCode insider editor and Extention host become unresponsive every time I do anything in the editor. VSCode becomes unusable until I disable this extension.

Extension version: 2.13.10
VS Code version: Code - Insiders 1.86.0-insider (f87fb292c3af22e51a7f5c628496cd8d6fd9ecd5, 2023-12-13T08:07:18.340Z)
OS version: Windows_NT x64 10.0.22621
Modes:

System Info

Item	Value
CPUs	Intel(R) Xeon(R) Platinum 8370C CPU @ 2.80GHz (16 x 2793)
GPU Status	2d_canvas: unavailable_software canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: disabled_software multiple_raster_threads: enabled_on opengl: disabled_off rasterization: disabled_software raw_draw: disabled_off_ok skia_graphite: disabled_off video_decode: disabled_software video_encode: disabled_software vulkan: disabled_off webgl: unavailable_software webgl2: unavailable_software webgpu: unavailable_software
Load (avg)	undefined
Memory (System)	63.95GB (38.09GB free)
Process Argv	--crash-reporter-id 0d7e94f8-13a8-49e9-871d-e0f29a922d60
Screen Reader	no
VM	0%

A/B Experiments

vsliv695:30137379
vsins829:30139715
vsliv368:30146709
vsreu685:30147344
python383:30185418
vspor879:30202332
vspor708:30202333
vspor363:30204092
vstes627:30244334
vslsvsres303:30308271
pythontb:30258533
pythonptprofiler:30281269
vshan820:30294714
vscod805cf:30301675
bridge0708:30335490
bridge0723:30353136
vsaa593:30376534
pythonvs932:30404738
py29gd2263:30784851
vscaac:30438845
vsclangdf:30492506
c4g48928:30535728
dsvsc012cf:30540253
a9j8j154:30646983
showlangstatbar:30737417
fixshowwlkth:30771523
showindicator:30805243
pythongtdpath:30726887
i26e3531:30792625
welcomedialog:30812478
pythonnosmt12:30779711
pythonidxpt:30768918
pythonnoceb:30776497
asynctok:30898717
dsvsc013:30777762
dsvsc014:30777825
pythonmpsinfo:30901776
dsvsc015:30821418
pythontestfixt:30866404
pythonregdiag2:30902439
pyreplss1:30879911
pythonmypyd1:30859725
pythoncet0:30859736
pythontbext0:30879054
accentitlementst:30870582
dsvsc016:30879898
dsvsc017:30880771
dsvsc018:30880772
aa_t_chat:30882232

[dibarbet]

@adolfdaniel would you mind setting dotnet.server.trace to Trace in your vscode settings, running the repro, then attaching the contents of the C# output window here?

[adolfdaniel]

C# output:

Installing Razor Telemetry Version = 7.0.0-preview.23528.1...
Platform: win32, x86_64

Downloading package 'Razor Language Server Telemetry (Windows / x64)' (9395 KB).................... Done!
Validating download...
Integrity Check succeeded.
Installing package 'Razor Language Server Telemetry (Windows / x64)'

Finished

Using dotnet configured on PATH
Dotnet path: C:\Program Files\dotnet\dotnet.exe
Activating C# + C# Dev Kit + C# IntelliCode...
Starting server at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.LanguageServer.dll
Server arguments c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.LanguageServer.dll --logLevel Trace --starredCompletionComponentPath c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.vscodeintellicode-csharp-0.1.26-win32-x64\components\starred-suggestions\node_modules\@vsintellicode\starred-suggestions-csharp --extension c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslynDevKit\Microsoft.VisualStudio.LanguageServices.DevKit.dll --sessionId 31371d14-345d-43aa-94a0-1ddd6110ff661702944404537 --telemetryLevel all --extensionLogDirectory c:\Users\adolfdaniel\AppData\Roaming\Code - Insiders\logs\20231218T111024\window1\exthost\ms-dotnettools.csharp
waiting for named pipe information from server...
[stdout] trce: Program[0]
      .NET Runtime Version: .NET 7.0.14
[stdout] dbug: LanguageServerWorkspaceFactory[0]
      Solution-level analyzer at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.AnalyzerUtilities.dll added to workspace.
dbug: LanguageServerWorkspaceFactory[0]
      Solution-level analyzer at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.CSharp.dll added to workspace.
dbug: LanguageServerWorkspaceFactory[0]
      Solution-level analyzer at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.CSharp.Features.dll added to workspace.
[stdout] dbug: LanguageServerWorkspaceFactory[0]
      Solution-level analyzer at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.CSharp.Workspaces.dll added to workspace.
[stdout] dbug: LanguageServerWorkspaceFactory[0]
      Solution-level analyzer at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.dll added to workspace.
dbug: LanguageServerWorkspaceFactory[0]
      Solution-level analyzer at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.Elfie.dll added to workspace.
dbug: LanguageServerWorkspaceFactory[0]
      Solution-level analyzer at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.ExternalAccess.AspNetCore.dll added to workspace.
dbug: LanguageServerWorkspaceFactory[0]
      Solution-level analyzer at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.dll added to workspace.
dbug: LanguageServerWorkspaceFactory[0]
      Solution-level analyzer at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.Features.dll added to workspace.
dbug: LanguageServerWorkspaceFactory[0]
      Solution-level analyzer at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.Razor.Compiler.CSharp.dll added to workspace.
dbug: LanguageServerWorkspaceFactory[0]
      Solution-level analyzer at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.Razor.Compiler.Language.dll added to workspace.
dbug: LanguageServerWorkspaceFactory[0]
      Solution-level analyzer at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.Razor.Compiler.Mvc.dll added to workspace.
dbug: LanguageServerWorkspaceFactory[0]
      Solution-level analyzer at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.Razor.Compiler.Mvc.Version1_X.dll added to workspace.
dbug: LanguageServerWorkspaceFactory[0]
      Solution-level analyzer at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.Razor.Compiler.Mvc.Version2_X.dll added to workspace.
dbug: LanguageServerWorkspaceFactory[0]
      Solution-level analyzer at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.Remote.Workspaces.dll added to workspace.
dbug: LanguageServerWorkspaceFactory[0]
      Solution-level analyzer at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.Scripting.dll added to workspace.
dbug: LanguageServerWorkspaceFactory[0]
      Solution-level analyzer at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.Workspaces.dll added to workspace.
dbug: LanguageServerWorkspaceFactory[0]
      Solution-level analyzer at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.Workspaces.MSBuild.BuildHost.dll added to workspace.
dbug: LanguageServerWorkspaceFactory[0]
      Solution-level analyzer at c:\Users\adolfdaniel\.vscode-insiders\extensions\ms-dotnettools.csharp-2.14.8-win32-x64\.roslyn\Microsoft.CodeAnalysis.Workspaces.MSBuild.dll added to workspace.
[stdout] {"pipeName":"\\\\.\\pipe\\8d88b2e1"}
received named pipe information from server
attempting to connect client to server...
client has connected to server
[Info  - 4:06:57 PM] [Program] Language server initialized
[LanguageServerHost] [12:06:57.391][Start]initialize
[LanguageServerHost] [12:06:57.400][Start]Initialize
[LanguageServerHost] [12:06:57.584][End]Initialize
[LanguageServerHost] [12:06:57.646][End]initialize
[LanguageServerHost] [12:06:57.661][Start]initialized
[LanguageServerHost] [12:06:57.763][End]initialized
[LanguageServerHost] [12:06:57.800][Start]workspace/diagnostic
[LanguageServerHost] PublicWorkspacePullDiagnosticsHandler(category: , source: ) started getting diagnostics
[LanguageServerHost] previousResults.Length=0
[LanguageServerHost] Processing 0 documents

Window output:

2023-12-18 11:10:25.936 [warning] Via 'product.json#extensionEnabledApiProposals' extension 'ms-python.python' wants API proposal 'registerIssueDataProvider' but that proposal DOES NOT EXIST. Likely, the proposal has been finalized (check 'vscode.d.ts') or was abandoned.
2023-12-18 11:10:26.470 [info] Started local extension host with pid 45560.
2023-12-18 11:10:27.369 [error] Extension 'ms-python.python' wants API proposal 'saveEditor' but that proposal DOES NOT EXIST. Likely, the proposal has been finalized (check 'vscode.d.ts') or was abandoned.
2023-12-18 11:10:30.196 [info] [perf] Render performance baseline is 65ms
2023-12-18 11:10:31.579 [error] Cannot read properties of undefined (reading 'querySelector'): TypeError: Cannot read properties of undefined (reading 'querySelector')
    at b.n (vscode-file://vscode-app/c:/Users/adolfdaniel/AppData/Local/Programs/Microsoft%20VS%20Code%20Insiders/resources/app/out/vs/workbench/workbench.desktop.main.js:2633:11406)
    at b.xtermReady (vscode-file://vscode-app/c:/Users/adolfdaniel/AppData/Local/Programs/Microsoft%20VS%20Code%20Insiders/resources/app/out/vs/workbench/workbench.desktop.main.js:2633:11169)
    at vscode-file://vscode-app/c:/Users/adolfdaniel/AppData/Local/Programs/Microsoft%20VS%20Code%20Insiders/resources/app/out/vs/workbench/workbench.desktop.main.js:2622:52624
2023-12-18 11:53:13.759 [info] Settings Sync: Updating due to change in sessions
2023-12-18 11:57:27.186 [info] Settings Sync: Updating due to change in sessions
2023-12-18 12:06:38.112 [info] Settings Sync: Updating due to change in sessions
2023-12-18 12:06:47.193 [info] Settings Sync: Updating due to change in sessions
2023-12-18 12:43:46.510 [info] Settings Sync: Updating due to change in sessions
2023-12-18 12:47:35.818 [info] Settings Sync: Updating due to change in sessions
2023-12-18 12:48:07.506 [info] Settings Sync: Updating due to change in sessions
2023-12-18 12:50:27.440 [info] Settings Sync: Updating due to change in sessions
2023-12-18 13:28:18.305 [info] Settings Sync: Updating due to change in sessions
2023-12-18 13:31:24.464 [info] Settings Sync: Updating due to change in sessions
2023-12-18 13:36:57.682 [info] Settings Sync: Updating due to change in sessions
2023-12-18 13:37:50.985 [info] Settings Sync: Updating due to change in sessions
2023-12-18 14:20:50.083 [info] Settings Sync: Updating due to change in sessions
2023-12-18 14:25:58.381 [info] Settings Sync: Updating due to change in sessions
2023-12-18 14:28:11.209 [info] Settings Sync: Updating due to change in sessions
2023-12-18 14:29:02.764 [info] Settings Sync: Updating due to change in sessions
2023-12-18 15:09:33.660 [info] Settings Sync: Updating due to change in sessions
2023-12-18 15:15:06.119 [info] Settings Sync: Updating due to change in sessions
2023-12-18 15:15:47.978 [info] Settings Sync: Updating due to change in sessions
2023-12-18 15:17:43.692 [info] Settings Sync: Updating due to change in sessions
2023-12-18 15:53:39.997 [info] Settings Sync: Updating due to change in sessions
2023-12-18 15:58:03.918 [info] Settings Sync: Updating due to change in sessions
2023-12-18 16:03:47.975 [info] Settings Sync: Updating due to change in sessions
2023-12-18 16:06:13.259 [warning] Settings pattern "application.*" doesn't match any settings
2023-12-18 16:06:13.619 [warning] Settings pattern "GitHub.copilot.manageExtension" doesn't match any settings
2023-12-18 16:06:21.234 [warning] Settings pattern "application.*" doesn't match any settings
2023-12-18 16:06:21.295 [warning] Settings pattern "GitHub.copilot.manageExtension" doesn't match any settings
2023-12-18 16:06:21.782 [error] [Extension Host] (node:45560) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
(Use `Code - Insiders --trace-deprecation ...` to show where the warning was created)
2023-12-18 16:06:44.523 [warning] Via 'product.json#extensionEnabledApiProposals' extension 'ms-python.python' wants API proposal 'registerIssueDataProvider' but that proposal DOES NOT EXIST. Likely, the proposal has been finalized (check 'vscode.d.ts') or was abandoned.
2023-12-18 16:06:44.958 [warning] Settings pattern "application.*" doesn't match any settings
2023-12-18 16:06:45.063 [warning] Settings pattern "GitHub.copilot.manageExtension" doesn't match any settings
2023-12-18 16:06:46.059 [info] Started local extension host with pid 16192.
2023-12-18 16:06:46.098 [error] Extension 'ms-python.python' wants API proposal 'saveEditor' but that proposal DOES NOT EXIST. Likely, the proposal has been finalized (check 'vscode.d.ts') or was abandoned.
2023-12-18 16:06:46.532 [error] Cannot read properties of undefined (reading 'querySelector'): TypeError: Cannot read properties of undefined (reading 'querySelector')
    at b.n (vscode-file://vscode-app/c:/Users/adolfdaniel/AppData/Local/Programs/Microsoft%20VS%20Code%20Insiders/resources/app/out/vs/workbench/workbench.desktop.main.js:2633:11406)
    at b.xtermReady (vscode-file://vscode-app/c:/Users/adolfdaniel/AppData/Local/Programs/Microsoft%20VS%20Code%20Insiders/resources/app/out/vs/workbench/workbench.desktop.main.js:2633:11169)
    at vscode-file://vscode-app/c:/Users/adolfdaniel/AppData/Local/Programs/Microsoft%20VS%20Code%20Insiders/resources/app/out/vs/workbench/workbench.desktop.main.js:2622:52624
2023-12-18 16:06:47.037 [warning] Settings pattern "application.*" doesn't match any settings
2023-12-18 16:06:47.063 [warning] Settings pattern "GitHub.copilot.manageExtension" doesn't match any settings
2023-12-18 16:06:47.865 [warning] Settings pattern "application.*" doesn't match any settings
2023-12-18 16:06:47.896 [warning] Settings pattern "GitHub.copilot.manageExtension" doesn't match any settings
2023-12-18 16:06:48.578 [error] [Extension Host] (node:16192) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
(Use `Code - Insiders --trace-deprecation ...` to show where the warning was created)
2023-12-18 16:06:49.027 [warning] Settings pattern "application.*" doesn't match any settings
2023-12-18 16:06:49.072 [warning] Settings pattern "GitHub.copilot.manageExtension" doesn't match any settings
2023-12-18 16:06:50.645 [warning] Settings pattern "application.*" doesn't match any settings
2023-12-18 16:06:50.669 [warning] Settings pattern "GitHub.copilot.manageExtension" doesn't match any settings
2023-12-18 16:06:50.815 [info] [perf] Render performance baseline is 34ms
2023-12-18 16:07:14.130 [info] Settings Sync: Updating due to change in sessions
2023-12-18 16:07:24.083 [info] Extension host (LocalProcess pid: 16192) is unresponsive.
2023-12-18 16:07:36.954 [error] Error: The editor could not be opened because the file was not found.
    at M.fc (vscode-file://vscode-app/c:/Users/adolfdaniel/AppData/Local/Programs/Microsoft%20VS%20Code%20Insiders/resources/app/out/vs/workbench/workbench.desktop.main.js:2152:25035)
    at async M.setInput (vscode-file://vscode-app/c:/Users/adolfdaniel/AppData/Local/Programs/Microsoft%20VS%20Code%20Insiders/resources/app/out/vs/workbench/workbench.desktop.main.js:2152:24121)
    at async g.S (vscode-file://vscode-app/c:/Users/adolfdaniel/AppData/Local/Programs/Microsoft%20VS%20Code%20Insiders/resources/app/out/vs/workbench/workbench.desktop.main.js:2150:24337)
    at async g.L (vscode-file://vscode-app/c:/Users/adolfdaniel/AppData/Local/Programs/Microsoft%20VS%20Code%20Insiders/resources/app/out/vs/workbench/workbench.desktop.main.js:2150:22946)
    at async g.openEditor (vscode-file://vscode-app/c:/Users/adolfdaniel/AppData/Local/Programs/Microsoft%20VS%20Code%20Insiders/resources/app/out/vs/workbench/workbench.desktop.main.js:2150:21935)
    at async vscode-file://vscode-app/c:/Users/adolfdaniel/AppData/Local/Programs/Microsoft%20VS%20Code%20Insiders/resources/app/out/vs/workbench/workbench.desktop.main.js:2279:23222

@dibarbet

[dibarbet]

Apologies for the delay here. I'm not sure what we could be doing to lock up the extension host. Does this still reproduce with the latest version of the extension? Does it reproduce if you're not using vscode insiders?

[adolfdaniel]

@dibarbet: Yes, I can reproduce the issue in the latest extension with the latest VS Code Stable build. The code that I open is fairly a large codebase though.

[dibarbet]

Can you let me know if the issue reproduces when you disable just the C# Dev Kit (and intellicode) extension, and leave the C# extension active by itself?

[adolfdaniel]

@dibarbet: Yes, I can still reproduce the extension host being unresponsive when I just enable the C# extension.

2024-05-30 14:20:04.878 [info] Extension host (LocalProcess pid: 35468) is unresponsive.
2024-05-30 14:20:07.224 [info] Extension host (LocalProcess pid: 35468) is responsive.
2024-05-30 14:20:07.225 [info] UNRESPONSIVE extension host: received responsive event and cancelling profiling session
2024-05-30 14:20:07.225 [info] UNRESPONSIVE extension host: starting to profile NOW
2024-05-30 14:21:15.620 [info] Extension host (LocalProcess pid: 35468) is unresponsive.
2024-05-30 14:21:16.172 [info] UNRESPONSIVE extension host: starting to profile NOW