Python language server from Pylance is crashing

[sarthakpati]

Environment data

• Language Server version: 2021.6.0
• OS and version: Windows 10 x64 10.0.19043
• Python version (& distribution if applicable, e.g. Anaconda): 3.6.12, Anaconda

Expected behaviour

Intellisense, code completion/highlighting and ctrl+click should work.

Actual behaviour

None of the smart features of Pylance are working correctly. I keep getting the following notification:

The Python Tools server crashed 5 times in the last 3 minutes. The server will not be restarted.

I have tried following the steps in microsoft/vscode-python#12286 and microsoft/python-language-server#909 but unable to fix this. Probably because I am using Pylance [ref].

Logs

[Info  - 1:36:54 PM] Pylance language server 2021.6.0 (pyright 209c8040) starting
[Info  - 1:36:54 PM] Server root directory: c:\Users\usr\.vscode\extensions\ms-python.vscode-pylance-2021.6.0\dist
[Info  - 1:36:54 PM] Background analysis(1) root directory: c:\Users\usr\.vscode\extensions\ms-python.vscode-pylance-2021.6.0\dist
[Info  - 1:36:54 PM] Background analysis(1) started
[Info  - 1:36:55 PM] No configuration file found.
[Info  - 1:36:55 PM] No pyproject.toml file found.
[Info  - 1:36:55 PM] Setting pythonPath for service "GANDLF": "C:\Projects\GENERIC\venv\python.exe"
[Warn  - 1:36:55 PM] stubPath c:\Projects\GENERIC\typings is not a valid directory.
[Info  - 1:36:55 PM] Assuming Python version 3.6
[Info  - 1:36:55 PM] Assuming Python platform Windows
Search paths for c:\Projects\GENERIC
  c:\Users\usr\.vscode\extensions\ms-python.vscode-pylance-2021.6.0\dist\typeshed-fallback\stdlib
  c:\Projects\GENERIC
  c:\Projects\GENERIC\typings
  c:\Users\usr\.vscode\extensions\ms-python.vscode-pylance-2021.6.0\dist\typeshed-fallback\stubs\...
  c:\Users\usr\.vscode\extensions\ms-python.vscode-pylance-2021.6.0\dist\bundled\stubs
  c:\projects\generic\venv\python36.zip
  c:\projects\generic\venv\dlls
  c:\projects\generic\venv\lib
  c:\projects\generic\venv
  c:\Users\usr\appdata\roaming\python\python36\site-packages
  c:\projects\generic\venv\lib\site-packages
  c:\projects\generic
[Info  - 1:36:55 PM] Searching for source files
Background analysis message: setConfigOptions
Background analysis message: ensurePartialStubPackages
Loading ONNX runtime...
Loaded ONNX runtime. Creating IntelliCode session...
Created IntelliCode session.

Code Snippet / Additional information

Not applicable

[jakebailey]

I'm confused; normally if we crash there would be an exception. Is this the entire set of logs?

[sarthakpati]

Yup, let me know what else you need and I can run it...

[jakebailey]

If your workspace folder were generic and not GENERIC, does it work as expected by chance?

[sarthakpati]

So, my actual folder is C:\Projects\GENERIC. I am not sure how I can change the workspace folder?

[jakebailey]

I mean to quite literally rename the folder; I think this may be related to a casing mismatch (see how the logs have the same thing multiple times but lowercased).

[sarthakpati]

Okay, I renamed, and I tried a debugging session and I got this output:

Background analysis message: invalidateAndForceReanalysis
Background analysis message: markFilesDirty
Background analysis message: markFilesDirty
Background analysis message: invalidateAndForceReanalysis
Background analysis message: invalidateAndForceReanalysis
[Info  - 2:13:07 PM] Searching for source files
Libzip Error: Not a zip archive
    at makeLibzipError (c:\Users\usr\.vscode\extensions\ms-python.vscode-pylance-2021.6.0\dist\pyright-internal\node_modules\@yarnpkg\fslib\lib\ZipFS.js:149:29)
    at new m (c:\Users\usr\.vscode\extensions\ms-python.vscode-pylance-2021.6.0\dist\pyright-internal\node_modules\@yarnpkg\fslib\lib\ZipFS.js:121:28)
    at getZipSync (c:\Users\usr\.vscode\extensions\ms-python.vscode-pylance-2021.6.0\dist\pyright-internal\node_modules\@yarnpkg\fslib\lib\ZipOpenFS.js:784:28)
    at g.makeCallSync (c:\Users\usr\.vscode\extensions\ms-python.vscode-pylance-2021.6.0\dist\pyright-internal\node_modules\@yarnpkg\fslib\lib\ZipOpenFS.js:665:21)
    at g.existsSync (c:\Users\usr\.vscode\extensions\ms-python.vscode-pylance-2021.6.0\dist\pyright-internal\node_modules\@yarnpkg\fslib\lib\ZipOpenFS.js:232:21)
    at c.existsSync (c:\Users\usr\.vscode\extensions\ms-python.vscode-pylance-2021.6.0\dist\pyright-internal\node_modules\@yarnpkg\fslib\lib\ProxiedFS.js:71:28)
    at r.existsSync (c:\Users\usr\.vscode\extensions\ms-python.vscode-pylance-2021.6.0\dist\pyright-internal\node_modules\@yarnpkg\fslib\lib\ProxiedFS.js:71:28)
    at T.existsSync (c:\Users\usr\.vscode\extensions\ms-python.vscode-pylance-2021.6.0\dist\pyright-internal\src\common\fileSystem.ts:213:23)
    at t.PyrightFileSystem.existsSync (c:\Users\usr\.vscode\extensions\ms-python.vscode-pylance-2021.6.0\dist\pyright-internal\src\pyrightFileSystem.ts:63:29)
    at c:\Users\usr\.vscode\extensions\ms-python.vscode-pylance-2021.6.0\dist\pyright-internal\src\analyzer\service.ts:1027:53
[Info  - 2:13:08 PM] Connection to server got closed. Server will restart.
[Error - 2:13:08 PM] Request textDocument/semanticTokens/full failed.
Error: Connection got disposed.

The intellisense is still not working.

[jakebailey]

That's a known bug that'll be fixed in today's release. #1397

After that is closed, we can retry and see if your original issue goes away.

[jakebailey]

We've just released 2021.6.1; can you retry and see if your issue is fixed?

[JaredVargason]

I can confirm it is fixed. I was having the same issue.

[sarthakpati]

We've just released 2021.6.1; can you retry and see if your issue is fixed?

YES, this fixed it! Thank you so much!!!