Pylance crashing once open Jupyter notebook

[micatske]

Environment data

• Pylance version: 2025.2.1
• OS and version: Pop OS 22.04
• Python version (& distribution if applicable, e.g. Anaconda): Python 3.11.5 conda 24.3.0
• VScode version : 1.97.0'
• Jupyter: 2025.1.0

Code Snippet

XXX

Repro Steps

Expected behavior

Pylance Crashing

Actual behavior

Pylance has crashed 5 times in the last 3 minutes. Pylance will not be restarted. Please check this link for more details.

Logs

2025-02-08 10:21:52.366 [info] Error: Request workspace/configuration failed with message: Cannot create property 'pythonPath' on string 'python -u'
    at aI (/home/micatske/.vscode/extensions/ms-python.vscode-pylance-2025.2.1/dist/vendor.bundle.js:2:1461022)
    at ZI (/home/micatske/.vscode/extensions/ms-python.vscode-pylance-2025.2.1/dist/vendor.bundle.js:2:1459180)
    at Immediate.<anonymous> (/home/micatske/.vscode/extensions/ms-python.vscode-pylance-2025.2.1/dist/vendor.bundle.js:2:1455466)
    at processImmediate (node:internal/timers:483:21)

2025-02-08 10:21:52.401 [info] [Error - 10:21:52 AM] Server process exited with code 1.
2025-02-08 10:21:52.404 [info] [Info  - 10:21:52 AM] Connection to server got closed. Server will restart.
2025-02-08 10:21:52.404 [info] true
2025-02-08 10:21:52.799 [info] [Info  - 10:21:52 AM] (60304) Server root directory: file:///home/micatske/.vscode/extensions/ms-python.vscode-pylance-2025.2.1/dist
2025-02-08 10:21:52.800 [info] [Info  - 10:21:52 AM] (60304) Pylance language server 2025.2.1 (pyright version 1.1.393, commit 3763156f) starting
2025-02-08 10:21:52.802 [info] [Info  - 10:21:52 AM] (60304) Starting service instance "Electric Price"
2025-02-08 10:21:52.847 [info] 

[rchiodo]

My guess is that the interpreter path has arguments somehow embedded in it. What's your python.defaultInterpreterPath?

[rchiodo]

@StellaHuang95 I'm guessing we're crashing right here:
https://github.com/microsoft/pyrx/blob/e4ee5ab77f8896dc8bb389fc8c803a323c620431/packages/pylance-internal/src/server/common.ts#L653

Which means the settings.json from the user is breaking us somehow.

Actually @micatske if you could include your entire 'settings.json', that would help diagnose the issue.

[rchiodo]

This line right here is breaking it:

"python": "python -u",

Not sure what that's for? Maybe another extension?

[micatske]

Thanks! Now the issue is fixed. That's a weird line