Stuck saving

[yajo]

Type: Bug

Behaviour

Whenever I save a python file, vscode gets stuck executing formatters.

Steps to reproduce:

1. Save any Python file.

Diagnostic data

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

Failed to import test module: tests
Traceback (most recent call last):
  File "/nix/store/kjgslpdqchx1sm7a5h9xibi5rrqcqfnl-python3-3.12.8/lib/python3.12/unittest/loader.py", line 429, in _find_test_path
    package = self._get_module_from_name(name)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/nix/store/kjgslpdqchx1sm7a5h9xibi5rrqcqfnl-python3-3.12.8/lib/python3.12/unittest/loader.py", line 339, in _get_module_from_name
    __import__(name)
  File "/home/yajo/prodevel/test16-odoo/odoo/custom/src/partner-contact/partner_contact_department/tests/__init__.py", line 3, in <module>
    from . import test_recursion
  File "/home/yajo/prodevel/test16-odoo/odoo/custom/src/partner-contact/partner_contact_department/tests/test_recursion.py", line 3, in <module>
    from odoo.exceptions import UserError
ModuleNotFoundError: No module named 'odoo'

2025-03-05 13:50:30.784 [error] Test Discovery named pipe /run/user/1000/python-test-discovery-4cb9f4f4593c2be6e0a9 error: TypeError: Cannot read properties of null (reading 'path')
    at e (/home/yajo/.vscode/extensions/ms-python.python-2025.0.0-linux-x64/out/client/extension.js:2:931360)
    at t.PythonResultResolver._resolveDiscovery (/home/yajo/.vscode/extensions/ms-python.python-2025.0.0-linux-x64/out/client/extension.js:2:916088)
    at t.PythonResultResolver.resolveDiscovery (/home/yajo/.vscode/extensions/ms-python.python-2025.0.0-linux-x64/out/client/extension.js:2:915172)
    at /home/yajo/.vscode/extensions/ms-python.python-2025.0.0-linux-x64/out/client/extension.js:2:966891
    at b.callback (/home/yajo/.vscode/extensions/ms-python.python-2025.0.0-linux-x64/out/client/extension.js:2:930904)
    at Object.thunk (/home/yajo/.vscode/extensions/ms-python.python-2025.0.0-linux-x64/out/client/extension.js:2:1993657)
2025-03-05 13:50:55.222 [info] El experimento \"pythonRecommendTensorboardExt\" está activo
2025-03-05 13:50:55.222 [info] El experimento \"pythonSurveyNotificationcf\" está activo
2025-03-05 13:50:55.222 [info] El experimento \"pythonTerminalEnvVarActivation\" está activo
2025-03-05 13:50:55.222 [info] El experimento \"pythonTestAdapter\" está activo
2025-03-05 13:50:55.222 [info] Native locator: Refresh started
2025-03-05 13:50:55.688 [info] > pyenv which python
2025-03-05 13:50:55.688 [info] cwd: ~/prodevel/test16-odoo/odoo/custom/src/partner-contact
2025-03-05 13:50:57.835 [info] > python3 -c "import sys;print(sys.executable)"
2025-03-05 13:51:07.734 [info] > pyenv which python
2025-03-05 13:51:07.734 [info] cwd: ~/prodevel/test16-odoo/odoo/custom/src/odoo
2025-03-05 13:52:28.980 [info] Poetry environment manager found at: /etc/profiles/per-user/yajo/bin/poetry
2025-03-05 13:53:05.916 [info] Native locator: Refresh finished in 134215 ms
2025-03-05 13:53:14.458 [info] Ruta de acceso del intérprete de Python: /etc/profiles/per-user/yajo/bin/python
2025-03-05 13:53:14.460 [info] Iniciando el servidor de lenguaje Pylance.
2025-03-05 13:53:43.137 [info] Iniciando el servidor de lenguaje Pylance.

Extension version: 2025.0.0
VS Code version: Code 1.97.2 (e54c774e0add60467559eb0d1e229c6452cf8447, 2025-02-12T23:20:35.343Z)
OS version: Linux x64 6.12.10-zen1
Modes:

• Python version (& distribution if applicable, e.g. Anaconda): 3.11.9
• Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Global
• Value of the python.languageServer setting: Default

User Settings

Multiroot scenario, following user settings may not apply:

languageServer: "Pylance"

terminal
• activateEnvironment: false

Installed Extensions

Extension Name	Extension Id	Version
catppuccin-vsc	Cat	3.16.1
code-spell-checker	str	4.0.39
code-spell-checker-spanish	str	2.3.5
copilot	Git	1.276.1399
copilot-chat	Git	0.24.2025021302
debugpy	ms-	2025.0.1
direnv	mkh	0.17.0
EditorConfig	Edi	0.17.1
even-better-toml	tam	0.21.2
gitblame	wad	11.1.2
gitlab-workflow	Git	6.1.1
jinjahtml	sam	0.20.0
js-debug	ms-	1.97.1
js-debug-companion	ms-	1.1.3
language-gettext	mro	0.5.0
nix-env-selector	arr	1.0.11
nix-extension-pack	pin	3.0.0
nix-ide	jno	0.4.12
OdooSnippets	jig	1.5.0
pre-commit-helper	ela	0.5.0
python	ms-	2025.0.0
rainbow-csv	mec	3.17.0
rewrap	stk	17.8.0
tasks	act	0.16.0
vscode-js-profile-table	ms-	1.0.10
vscode-language-pack-es	MS-	1.97.2025021209
vscode-pylance	ms-	2025.2.1
vscode-xml	red	0.28.2025021408
vscode-yaml	red	1.14.0
vsliveshare	ms-	1.0.5948

System Info

Item	Value
CPUs	13th Gen Intel(R) Core(TM) i7-1360P (16 x 1040)
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)	5, 5, 4
Memory (System)	15.29GB (5.99GB free)
Process Argv	--ozone-platform-hint=auto --enable-features=WaylandWindowDecorations --crash-reporter-id b63bfa16-331f-4806-adea-efa40e7321e8
Screen Reader	no
VM	0%
DESKTOP_SESSION	gnome
XDG_CURRENT_DESKTOP	GNOME
XDG_SESSION_DESKTOP	gnome
XDG_SESSION_TYPE	wayland

A/B Experiments

vsliv368cf:30146710
vspor879:30202332
vspor708:30202333
vspor363:30204092
pythonvspyt551cf:31249601
vscod805:30301674
binariesv615:30325510
py29gd2263:31024239
c4g48928:30535728
azure-dev_surveyone:30548225
962ge761:30959799
h48ei257:31000450
pythontbext0:30879054
cppperfnew:31000557
dwnewjupyter:31046869
nativerepl1:31139838
pythonrstrctxt:31112756
nativeloc1:31192215
iacca1:31171482
5fd0e150:31155592
dwcopilot:31170013
6074i472:31201624
dwoutputs:31242946
customenabled:31248079
hdaa2157:31222309
copilot_t_ci:31222730
jda6j935:31233686
cp15370_c:31242498
copilothoveron:31248524

[karthiknadig]

@yajo Do you have any particular formatter installed for python? When you right click on the file in the editor and select the Format Document With... option what do you see?

[tboddyspargo]

I had something similar show up recently. I haven't dug into it too much. I have charliermarsh.ruff version 2025.14.0 set as my "format on save" formatter.

Not sure if it's related or not, but I also noticed this 100% CPU usage for a python file in the VSCode Process Explorer at the same time:

[yajo]

I've installed charliermarsh.ruff too, just in version 2025.8.0

[karthiknadig]

@yajo Do you see a similar spike in CPU usage as mentioned here: #24866 (comment)

The python extension itself does not register any formatters. The notification you see is coming from core. But it could be slowed down by analysis running. So it might help figure out if and where such spike is occuring.

[github-actions]

Because we have not heard back with the information we requested, we are closing this issue for now. If you are able to provide the info later on, then we will be happy to re-open this issue to pick up where we left off.

Happy Coding!