Everything hangs when pytest is enabled because of broken test discovery

Type: Bug

Behaviour

When using "python.testing.pytestEnabled": true, in settings.json everything hangs after several file saves.
Python log stops at

Running discovery for pytest using the new test adapter.

It is happening only if there are errors during discovery (no pytest at all, or no pytest output)
Git extension stops working (inifinite loading), codeium stops working, I cannot rename or move files, cannot restart test discovery, etc.
All started from v2024.21.2024111202 (pre-release), v2024.20.0 don't have this issue.

Steps to reproduce:

Method 1 - without pytest:

Setup:

.
├── .vscode
│   └── settings.json
└── a.py

settings.json:

{
    "python.testing.pytestEnabled": true,
}

a.py is empty file

Method 2 - with pytest and broken pytest plugin:

Setup:

.
├── .vscode
│   └── settings.json
└── a.py
└── conftest.py

settings.json:

{
    "python.testing.pytestEnabled": true,
}

a.py:

1 / 0

conftest.py:

pytest_plugins = ('a',)

Go to file a.py;
Press Ctrl+S several times;
Check Python Output window, wait for Running discovery for pytest using the new test adapter. message;
Every other Ctrl+S will result in [error] Test discovery already in progress, not starting a new one..

Diagnostic data

Method 1: Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

2024-11-30 02:01:35.587 [info] Experiment 'pythonRecommendTensorboardExt' is active
2024-11-30 02:01:35.587 [info] Experiment 'pythonSurveyNotification' is active
2024-11-30 02:01:35.587 [info] Experiment 'pythonTerminalEnvVarActivation' is active
2024-11-30 02:01:35.587 [info] Experiment 'pythonTestAdapter' is active
2024-11-30 02:01:35.587 [warning] Dir "/home/grigoriy/vscode-test2/.pixi/envs" is not watchable (directory does not exist)
2024-11-30 02:01:35.587 [info] Python interpreter path: /bin/python3
2024-11-30 02:01:35.681 [info] > pyenv which python
2024-11-30 02:01:35.681 [info] cwd: .
2024-11-30 02:01:35.886 [info] Shell integration status changed, can confirm it's working.
2024-11-30 02:01:45.982 [info] Starting Pylance language server.
2024-11-30 02:01:48.125 [info] Discover tests for workspace name: vscode-test2 - uri: /home/grigoriy/vscode-test2/a.py
2024-11-30 02:01:48.125 [info] Running discovery for pytest using the new test adapter.
2024-11-30 02:01:48.131 [info] All environment variables set for pytest discovery: {...}
2024-11-30 02:01:48.151 [info] > /bin/python3 -m pytest -p vscode_pytest --collect-only --rootdir=.
2024-11-30 02:01:48.151 [info] cwd: .
2024-11-30 02:01:48.161 [error] /bin/python3: No module named pytest

2024-11-30 02:01:48.172 [error] Subprocess exited unsuccessfully with exit code 1 and signal null on workspace /home/grigoriy/vscode-test2.
2024-11-30 02:01:48.172 [error] Subprocess exited unsuccessfully with exit code 1 and signal null on workspace /home/grigoriy/vscode-test2. Creating and sending error discovery payload
2024-11-30 02:01:48.173 [error] pytest test discovery error for workspace:  /home/grigoriy/vscode-test2 
  
 The python test process was terminated before it could exit on its own, the process errored with: Code: 1, Signal: null for workspace /home/grigoriy/vscode-test2
2024-11-30 02:01:49.968 [info] Discover tests for workspace name: vscode-test2 - uri: /home/grigoriy/vscode-test2/a.py
2024-11-30 02:01:49.968 [info] Running discovery for pytest using the new test adapter.
2024-11-30 02:01:49.972 [info] arg: --rootdir already exists in args, not adding.
2024-11-30 02:01:49.972 [info] All environment variables set for pytest discovery: {...}
2024-11-30 02:01:50.029 [info] > /bin/python3 -m pytest -p vscode_pytest --collect-only --rootdir=.
2024-11-30 02:01:50.029 [info] cwd: .
2024-11-30 02:01:50.038 [error] /bin/python3: No module named pytest

2024-11-30 02:01:50.040 [error] Subprocess exited unsuccessfully with exit code 1 and signal null on workspace /home/grigoriy/vscode-test2.
2024-11-30 02:01:50.043 [error] Subprocess exited unsuccessfully with exit code 1 and signal null on workspace /home/grigoriy/vscode-test2. Creating and sending error discovery payload
2024-11-30 02:01:50.043 [error] pytest test discovery error for workspace:  /home/grigoriy/vscode-test2 
  
 The python test process was terminated before it could exit on its own, the process errored with: Code: 1, Signal: null for workspace /home/grigoriy/vscode-test2
2024-11-30 02:01:51.498 [info] Discover tests for workspace name: vscode-test2 - uri: /home/grigoriy/vscode-test2/a.py
2024-11-30 02:01:51.498 [info] Running discovery for pytest using the new test adapter.
2024-11-30 02:01:51.502 [info] arg: --rootdir already exists in args, not adding.
2024-11-30 02:01:51.502 [info] All environment variables set for pytest discovery: {}
2024-11-30 02:01:51.521 [info] > /bin/python3 -m pytest -p vscode_pytest --collect-only --rootdir=.
2024-11-30 02:01:51.521 [info] cwd: .
2024-11-30 02:01:51.530 [error] /bin/python3: No module named pytest

2024-11-30 02:01:51.532 [error] Subprocess exited unsuccessfully with exit code 1 and signal null on workspace /home/grigoriy/vscode-test2.
2024-11-30 02:01:51.532 [error] Subprocess exited unsuccessfully with exit code 1 and signal null on workspace /home/grigoriy/vscode-test2. Creating and sending error discovery payload
2024-11-30 02:01:51.532 [error] pytest test discovery error for workspace:  /home/grigoriy/vscode-test2 
  
 The python test process was terminated before it could exit on its own, the process errored with: Code: 1, Signal: null for workspace /home/grigoriy/vscode-test2
2024-11-30 02:01:52.825 [info] Discover tests for workspace name: vscode-test2 - uri: /home/grigoriy/vscode-test2/a.py
2024-11-30 02:01:52.825 [info] Running discovery for pytest using the new test adapter.
2024-11-30 02:05:33.433 [info] Discover tests for workspace name: vscode-test2 - uri: /home/grigoriy/vscode-test2/a.py
2024-11-30 02:05:33.433 [info] Running discovery for pytest using the new test adapter.
2024-11-30 02:05:33.434 [error] Test discovery already in progress, not starting a new one.
2024-11-30 02:05:38.123 [info] Discover tests for workspace name: vscode-test2 - uri: /home/grigoriy/vscode-test2/a.py
2024-11-30 02:05:38.124 [info] Running discovery for pytest using the new test adapter.
2024-11-30 02:05:38.124 [error] Test discovery already in progress, not starting a new one.
2024-11-30 02:05:41.684 [info] Discover tests for workspace name: vscode-test2 - uri: /home/grigoriy/vscode-test2/a.py
2024-11-30 02:05:41.684 [info] Running discovery for pytest using the new test adapter.
2024-11-30 02:05:41.684 [error] Test discovery already in progress, not starting a new one.

Method 2: Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

2024-11-30 02:32:46.928 [info] Experiment 'pythonRecommendTensorboardExt' is active
2024-11-30 02:32:46.928 [info] Experiment 'pythonSurveyNotification' is active
2024-11-30 02:32:46.928 [info] Experiment 'pythonTerminalEnvVarActivation' is active
2024-11-30 02:32:46.928 [info] Experiment 'pythonTestAdapter' is active
2024-11-30 02:32:46.928 [warning] Dir "/home/grigoriy/vscode-test2/.pixi/envs" is not watchable (directory does not exist)
2024-11-30 02:32:46.928 [info] Python interpreter path: /bin/python3
2024-11-30 02:32:46.981 [info] > pyenv which python
2024-11-30 02:32:46.981 [info] cwd: .
2024-11-30 02:32:47.045 [info] > conda info --json
2024-11-30 02:32:59.276 [info] Starting Pylance language server.
2024-11-30 02:32:59.512 [info] Discover tests for workspace name: vscode-test2 - uri: /home/grigoriy/vscode-test2/a.py
2024-11-30 02:32:59.512 [info] Running discovery for pytest using the new test adapter.
2024-11-30 02:32:59.537 [info] > /bin/python3 -m pytest -p vscode_pytest --collect-only --rootdir=.
2024-11-30 02:32:59.538 [info] cwd: .
2024-11-30 02:32:59.713 [error] Traceback (most recent call last):
  File "/usr/lib/python3.10/runpy.py", line 196, in _run_module_as_main
...
  File "/home/grigoriy/vscode-test2/a.py", line 1, in <module>
    1 / 0
ZeroDivisionError: division by zero

2024-11-30 02:32:59.736 [error] Subprocess exited unsuccessfully with exit code 1 and signal null on workspace /home/grigoriy/vscode-test2.
2024-11-30 02:32:59.736 [error] Subprocess exited unsuccessfully with exit code 1 and signal null on workspace /home/grigoriy/vscode-test2. Creating and sending error discovery payload
2024-11-30 02:32:59.736 [error] pytest test discovery error for workspace:  /home/grigoriy/vscode-test2 
  
 The python test process was terminated before it could exit on its own, the process errored with: Code: 1, Signal: null for workspace /home/grigoriy/vscode-test2
2024-11-30 02:33:03.004 [info] Discover tests for workspace name: vscode-test2 - uri: /home/grigoriy/vscode-test2/a.py
2024-11-30 02:33:03.004 [info] Running discovery for pytest using the new test adapter.
2024-11-30 02:33:03.096 [info] arg: --rootdir already exists in args, not adding.
2024-11-30 02:33:03.121 [info] > /bin/python3 -m pytest -p vscode_pytest --collect-only --rootdir=.
2024-11-30 02:33:03.121 [info] cwd: .
2024-11-30 02:33:03.340 [error] Traceback (most recent call last):
  File "/usr/lib/python3.10/runpy.py", line 196, in _run_module_as_main
...
  File "/home/grigoriy/vscode-test2/a.py", line 1, in <module>
    1 / 0
ZeroDivisionError: division by zero

2024-11-30 02:33:03.368 [error] Subprocess exited unsuccessfully with exit code 1 and signal null on workspace /home/grigoriy/vscode-test2.
2024-11-30 02:33:03.370 [error] Subprocess exited unsuccessfully with exit code 1 and signal null on workspace /home/grigoriy/vscode-test2. Creating and sending error discovery payload
2024-11-30 02:33:03.370 [error] pytest test discovery error for workspace:  /home/grigoriy/vscode-test2 
  
 The python test process was terminated before it could exit on its own, the process errored with: Code: 1, Signal: null for workspace /home/grigoriy/vscode-test2
2024-11-30 02:33:05.948 [info] Discover tests for workspace name: vscode-test2 - uri: /home/grigoriy/vscode-test2/a.py
2024-11-30 02:33:05.949 [info] Running discovery for pytest using the new test adapter.
2024-11-30 02:33:05.965 [info] arg: --rootdir already exists in args, not adding.
2024-11-30 02:33:05.988 [info] > /bin/python3 -m pytest -p vscode_pytest --collect-only --rootdir=.
2024-11-30 02:33:05.988 [info] cwd: .
2024-11-30 02:33:06.192 [error] Traceback (most recent call last):
  File "/usr/lib/python3.10/runpy.py", line 196, in _run_module_as_main
...
  File "/home/grigoriy/vscode-test2/a.py", line 1, in <module>
    1 / 0
ZeroDivisionError: division by zero

2024-11-30 02:33:06.212 [error] Subprocess exited unsuccessfully with exit code 1 and signal null on workspace /home/grigoriy/vscode-test2.
2024-11-30 02:33:06.212 [error] Subprocess exited unsuccessfully with exit code 1 and signal null on workspace /home/grigoriy/vscode-test2. Creating and sending error discovery payload
2024-11-30 02:33:06.212 [error] pytest test discovery error for workspace:  /home/grigoriy/vscode-test2 
  
 The python test process was terminated before it could exit on its own, the process errored with: Code: 1, Signal: null for workspace /home/grigoriy/vscode-test2
2024-11-30 02:33:08.693 [info] Discover tests for workspace name: vscode-test2 - uri: /home/grigoriy/vscode-test2/a.py
2024-11-30 02:33:08.694 [info] Running discovery for pytest using the new test adapter.
2024-11-30 02:33:11.174 [info] Discover tests for workspace name: vscode-test2 - uri: /home/grigoriy/vscode-test2/a.py
2024-11-30 02:33:11.174 [info] Running discovery for pytest using the new test adapter.
2024-11-30 02:33:11.175 [error] Test discovery already in progress, not starting a new one.

Extension version: v2024.21.2024112901 (pre-release)
VS Code version: Code 1.95.3 (f1a4fb101478ce6ec82fe9627c43efbf9e98c813, 2024-11-13T14:50:04.152Z)
OS version: Windows_NT x64 10.0.22631
Modes:
Remote OS version: Linux x64 5.15.167.4-microsoft-standard-WSL2

Python version (& distribution if applicable, e.g. Anaconda): 3.10.12
Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Global
Value of the python.languageServer setting: Default

User Settings


languageServer: "Pylance"

testing
• pytestEnabled: true

Installed Extensions

Extension Name	Extension Id	Version
JavaScript Debugger	ms-vscode.js-debug	1.95.3
Mypy Type Checker	ms-python.mypy-type-checker	2024.0.0
Pylance	ms-python.vscode-pylance	2024.11.102
Python	ms-python.python	2024.21.2024112901
Python Debugger	ms-python.debugpy	2024.13.2024112901
Python Environment Manager	donjayamanne.python-environment-manager	1.2.4
Python Extension Pack	donjayamanne.python-extension-pack	1.7.0
Table Visualizer for JavaScript Profiles	ms-vscode.vscode-js-profile-table	1.0.10

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Uh oh!

Everything hangs when pytest is enabled because of broken test discovery #24501

Behaviour

Steps to reproduce:

Method 1 - without pytest:

Method 2 - with pytest and broken pytest plugin:

Diagnostic data

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Everything hangs when pytest is enabled because of broken test discovery #24501

Description

Behaviour

Steps to reproduce:

Method 1 - without pytest:

Method 2 - with pytest and broken pytest plugin:

Diagnostic data

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions