A failure to find an environment prevents Pylance from loading

[rchiodo]

Type: Bug

Behaviour

If the default interpreter is set to a non existent (or deleted venv), Pylance will fail to launch.

Steps to reproduce:

1. Create a folder
2. Create a venv in that folder
3. Create a python file in that folder
4. Set the interpreter for that folder to that venv
5. Close folder
6. Delete venv
7. Reopen folder
8. No intellisense

Diagnostic data

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

2024-09-30 10:41:36.010 [info] Experiment 'All' is active
2024-09-30 10:41:36.011 [info] Native locator: Refresh started
2024-09-30 10:41:36.011 [info] Default formatter is set to ms-python.black-formatter for workspace c:\Users\rchiodo\source\testing\notebooks
2024-09-30 10:41:36.032 [error] Python Extension: interpreterManager.refresh [l [Error]: Failed to resolve env "C:\\Users\\rchiodo\\source\\repos\\debugpy\\.venv11"
	at ae (c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\out\client\extension.js:2:2052103)
	at oe (c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\out\client\extension.js:2:2050063)
	at Immediate.<anonymous> (c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\out\client\extension.js:2:2046357)
	at process.processImmediate (node:internal/timers:483:21)] {
  code: -4,
  data: undefined
}
2024-09-30 10:41:36.061 [info] > pyenv which python
2024-09-30 10:41:36.061 [info] cwd: .
2024-09-30 10:41:38.707 [info] Conda environment manager found at: C:\Users\rchiodo\AppData\Local\anaconda3\Scripts\conda.exe
2024-09-30 10:41:38.955 [info] Conda environment manager found at: C:\Users\rchiodo\source\testing\test_pylance\CondaEnv\Scripts\conda.exe
2024-09-30 10:41:38.960 [info] Native locator: Refresh finished in 3077 ms
2024-09-30 10:41:38.973 [error] [
  'getActivatedEnvironmentVariables, Class name = j, completed in 0ms, has a falsy return value, Arg 1: <Uri:c:\\Users\\rchiodo\\source\\testing\\notebooks>, Arg 2: undefined, Arg 3: undefined, Arg 4: "C:\\\\WINDOWS\\\\System32\\\\WindowsPowerShell\\\\v1.0\\\\powershell.exe"',
  [l [Error]: Failed to resolve env "C:\\Users\\rchiodo\\source\\repos\\debugpy\\.venv11"
  	at ae (c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\out\client\extension.js:2:2052103)
  	at oe (c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\out\client\extension.js:2:2050063)
  	at Immediate.<anonymous> (c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\out\client\extension.js:2:2046357)
  	at process.processImmediate (node:internal/timers:483:21)] {
    code: -4,
    data: undefined
  }
]
2024-09-30 10:41:38.973 [error] Failed to apply terminal env vars undefined [l [Error]: Failed to resolve env "C:\\Users\\rchiodo\\source\\repos\\debugpy\\.venv11"
	at ae (c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\out\client\extension.js:2:2052103)
	at oe (c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\out\client\extension.js:2:2050063)
	at Immediate.<anonymous> (c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\out\client\extension.js:2:2046357)
	at process.processImmediate (node:internal/timers:483:21)] {
  code: -4,
  data: undefined
}
2024-09-30 10:41:38.973 [error] [
  'Failed to activate a workspace, Class name = v, completed in 2994ms, has a falsy return value, Arg 1: <Uri:c:\\Users\\rchiodo\\source\\testing\\notebooks>, Arg 2: {"started":1727718095812}, Return Value: undefined',
  [l [Error]: Failed to resolve env "C:\\Users\\rchiodo\\source\\repos\\debugpy\\.venv11"
  	at ae (c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\out\client\extension.js:2:2052103)
  	at oe (c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\out\client\extension.js:2:2050063)
  	at Immediate.<anonymous> (c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\out\client\extension.js:2:2046357)
  	at process.processImmediate (node:internal/timers:483:21)] {
    code: -4,
    data: undefined
  }
]
2024-09-30 10:41:38.973 [error] Failure during activation. [l [Error]: Failed to resolve env "C:\\Users\\rchiodo\\source\\repos\\debugpy\\.venv11"
	at ae (c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\out\client\extension.js:2:2052103)
	at oe (c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\out\client\extension.js:2:2050063)
	at Immediate.<anonymous> (c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\out\client\extension.js:2:2046357)
	at process.processImmediate (node:internal/timers:483:21)] {
  code: -4,
  data: undefined
}
2024-09-30 10:41:38.974 [error] sendStartupTelemetry() failed. [l [Error]: Failed to resolve env "C:\\Users\\rchiodo\\source\\repos\\debugpy\\.venv11"
	at ae (c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\out\client\extension.js:2:2052103)
	at oe (c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\out\client\extension.js:2:2050063)
	at Immediate.<anonymous> (c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\out\client\extension.js:2:2046357)
	at process.processImmediate (node:internal/timers:483:21)] {
  code: -4,
  data: undefined
}
2024-09-30 10:41:55.945 [info] > ~\source\testing\test_pylance\CondaEnv\Scripts\conda.exe info --json
2024-09-30 10:41:59.311 [info] > ~\source\testing\test_pylance\CondaEnv\Scripts\conda.exe run -n bk-tutorial --no-capture-output python ~\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\python_files\get_output_via_markers.py ~/.vscode-insiders/extensions/ms-python.python-2024.15.2024092702-win32-x64/python_files/printEnvVariables.py
2024-09-30 10:41:59.311 [info] shell: commandPrompt
2024-09-30 10:41:59.311 [info] > ~\source\testing\test_pylance\CondaEnv\Scripts\conda.exe run -n bk-tutorial --no-capture-output python ~\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\python_files\get_output_via_markers.py ~/.vscode-insiders/extensions/ms-python.python-2024.15.2024092702-win32-x64/python_files/printEnvVariables.py
2024-09-30 10:41:59.311 [info] shell: commandPrompt
2024-09-30 10:42:00.866 [error] getActivatedEnvironmentVariables Error: Command failed: C:\Users\rchiodo\source\testing\test_pylance\CondaEnv\Scripts\conda.exe run -n bk-tutorial --no-capture-output python c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\python_files\get_output_via_markers.py c:/Users/rchiodo/.vscode-insiders/extensions/ms-python.python-2024.15.2024092702-win32-x64/python_files/printEnvVariables.py

EnvironmentLocationNotFound: Not a conda environment: C:\Users\rchiodo\source\testing\test_pylance\CondaEnv\envs\bk-tutorial


    at genericNodeError (node:internal/errors:984:15)
    at wrappedFn (node:internal/errors:538:14)
    at ChildProcess.exithandler (node:child_process:423:12)
    at ChildProcess.emit (node:events:531:35)
    at maybeClose (node:internal/child_process:1105:16)
    at Process.ChildProcess._handle.onexit (node:internal/child_process:305:5) {
  code: 1,
  killed: false,
  signal: null,
  cmd: 'C:\\Users\\rchiodo\\source\\testing\\test_pylance\\CondaEnv\\Scripts\\conda.exe run -n bk-tutorial --no-capture-output python c:\\Users\\rchiodo\\.vscode-insiders\\extensions\\ms-python.python-2024.15.2024092702-win32-x64\\python_files\\get_output_via_markers.py c:/Users/rchiodo/.vscode-insiders/extensions/ms-python.python-2024.15.2024092702-win32-x64/python_files/printEnvVariables.py'
}
2024-09-30 10:42:00.886 [error] getActivatedEnvironmentVariables Error: Command failed: C:\Users\rchiodo\source\testing\test_pylance\CondaEnv\Scripts\conda.exe run -n bk-tutorial --no-capture-output python c:\Users\rchiodo\.vscode-insiders\extensions\ms-python.python-2024.15.2024092702-win32-x64\python_files\get_output_via_markers.py c:/Users/rchiodo/.vscode-insiders/extensions/ms-python.python-2024.15.2024092702-win32-x64/python_files/printEnvVariables.py

EnvironmentLocationNotFound: Not a conda environment: C:\Users\rchiodo\source\testing\test_pylance\CondaEnv\envs\bk-tutorial


    at genericNodeError (node:internal/errors:984:15)
    at wrappedFn (node:internal/errors:538:14)
    at ChildProcess.exithandler (node:child_process:423:12)
    at ChildProcess.emit (node:events:531:35)
    at maybeClose (node:internal/child_process:1105:16)
    at Process.ChildProcess._handle.onexit (node:internal/child_process:305:5) {
  code: 1,
  killed: false,
  signal: null,
  cmd: 'C:\\Users\\rchiodo\\source\\testing\\test_pylance\\CondaEnv\\Scripts\\conda.exe run -n bk-tutorial --no-capture-output python c:\\Users\\rchiodo\\.vscode-insiders\\extensions\\ms-python.python-2024.15.2024092702-win32-x64\\python_files\\get_output_via_markers.py c:/Users/rchiodo/.vscode-insiders/extensions/ms-python.python-2024.15.2024092702-win32-x64/python_files/printEnvVariables.py'
}
2024-09-30 10:42:19.391 [info] Native locator: Refresh started
2024-09-30 10:42:19.554 [info] Conda environment manager found at: C:\Users\rchiodo\AppData\Local\anaconda3\Scripts\conda.exe
2024-09-30 10:42:19.595 [info] Conda environment manager found at: C:\Users\rchiodo\source\testing\test_pylance\CondaEnv\Scripts\conda.exe
2024-09-30 10:42:19.612 [info] Native locator: Refresh finished in 221 ms
2024-09-30 10:43:09.626 [info] Native locator: Refresh started
2024-09-30 10:43:09.790 [info] Conda environment manager found at: C:\Users\rchiodo\AppData\Local\anaconda3\Scripts\conda.exe
2024-09-30 10:43:09.852 [info] Conda environment manager found at: C:\Users\rchiodo\source\testing\test_pylance\CondaEnv\Scripts\conda.exe
2024-09-30 10:43:09.898 [info] Native locator: Refresh finished in 249 ms
2024-09-30 10:43:15.483 [info] Discover tests for workspace name: notebooks - uri: c:\Users\rchiodo\source\testing\notebooks
2024-09-30 10:43:15.483 [info] Python interpreter path: ~\AppData\Local\Microsoft\WindowsApps\python3.11.exe
2024-09-30 10:43:15.491 [info] > pixi --version

Extension version: 2024.15.2024092702
VS Code version: Code - Insiders 1.94.0-insider (b7894e64dd103a19dd5015326d8310232236de0f, 2024-09-30T12:16:57.458Z)
OS version: Windows_NT x64 10.0.26100
Modes:

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

User Settings

languageServer: "Pylance"

experiments
• optInto: ["All"]

Installed Extensions

Extension Name	Extension Id	Version
Black Formatter	ms-python.black-formatter	2024.3.12071014
ESLint	dbaeumer.vscode-eslint	3.0.10
GitHub Copilot	GitHub.copilot	1.234.1129
GitHub Copilot Chat	GitHub.copilot-chat	0.21.2024092703
Italian Language Pack for Visual Studio Code	MS-CEINTL.vscode-language-pack-it	1.94.2024092509
JavaScript Debugger	ms-vscode.js-debug	1.94.0
JavaScript Debugger Companion Extension	ms-vscode.js-debug-companion	1.1.3
Jupyter	ms-toolsai.jupyter	2024.9.2024092401
Jupyter Cell Tags	ms-toolsai.vscode-jupyter-cell-tags	0.1.9
Jupyter Keymap	ms-toolsai.jupyter-keymap	1.1.2
Jupyter Notebook Renderers	ms-toolsai.jupyter-renderers	1.0.19
Jupyter Slide Show	ms-toolsai.vscode-jupyter-slideshow	0.1.6
Live Share	ms-vsliveshare.vsliveshare	1.0.5941
Playwright Test for VSCode	ms-playwright.playwright	1.1.7
Prettier - Code formatter	esbenp.prettier-vscode	11.0.0
Pylance	ms-python.vscode-pylance	2024.9.102
Python	ms-python.python	2024.15.2024092702
Python Debugger	ms-python.debugpy	2024.11.2024092501
Table Visualizer for JavaScript Profiles	ms-vscode.vscode-js-profile-table	1.0.10
WSL	ms-vscode-remote.remote-wsl	0.88.4

System Info

Item	Value
CPUs	AMD EPYC 7763 64-Core Processor (16 x 2445)
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 webnn: disabled_off
Load (avg)	undefined
Memory (System)	63.95GB (40.84GB free)
Process Argv	--folder-uri file:///c%3A/Users/rchiodo/source/testing/notebooks --enable-proposed-api msft-1es.es-chat --crash-reporter-id fb5f004c-0c45-4402-af67-bb66466f13d8
Screen Reader	no
VM	0%

A/B Experiments

vsliv368cf:30146710
vspor879:30202332
vspor708:30202333
vspor363:30204092
vsc_aacf:30263846
vscod805:30301674
vsaa593:30376534
py29gd2263:31024238
c4g48928:30535728
a9j8j154:30646983
962ge761:30841072
f8hc8238:30694864
pythongtdpath:30726887
welcomedialog:30812478
pythonnoceb:30776497
asynctok:30898717
dsvsc014:30777825
dsvsc015:30821418
pythonmypyd1:30859725
h48ei257:31000450
pythontbext0:30879054
accentitlementst:30870582
dsvsc016:30879898
dsvsc017:30880771
dsvsc018:30880772
cppperfnew:30980852
pythonait:30973460
724cj586:31013169
a69g1124:31018687
dvdeprecation:31040973
dwnewjupytercf:31046870
nb_pkg_only:31057982
nativerepl1:31134653
refactort:31084545
pythonrstrctxt:31093868
flighttreat:31119334
wkspc-onlycs-t:31132770
nativeloc1:31118317
wkspc-ranged-c:31125598
cf971741:31144450
e80f6927:31120813
defaultse:31146405
i21gd607:31141543
iacca1:31144502
notype1:31143044
b50ed353:31138333
showchatpanel:31139797
f8igb616:31140137

[s-kai273]

I identified the cause of this issue and fixed it on this PR.
The problem was due to missing error handling when resolving Python environments.