Activating extension `ms-python.python` failed: Cannot read property 'uri' of undefined

[terryzhao127]

Environment data

• VS Code version: 1.28.1
• Extension version (available under the Extensions sidebar): 2018.9.0
• OS and version: Windows 10 17134.345
• Python version (& distribution if applicable, e.g. Anaconda): 3.7.0 (directly installed)
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): no
• Relevant/affected Python packages and their versions: no

Actual behavior

vscode-python cannot be activated.
Command 'Python: Select Interpreter' returns nothing.
Other commands return 'Python: XXX not found'.

Expected behavior

The extension can be activated.

Steps to reproduce:

1. Install python 3.7.0.
2. Install Visual Studio Code.
3. Install vscodepython.
4. Use the extension.

Logs

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

NOTHING

Output from Console under the Developer Tools panel (toggle Developer Tools on under Help)

/C:/Users/guikarist/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:282 [Extension Host] Activating extension 'ms-python.python' failed: Cannot read property 'uri' of undefined.
t.log @ /C:/Users/guikarist/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:282
/C:/Users/guikarist/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:282 [Extension Host] Activating extension `ms-python.python` failed:  Cannot read property 'uri' of undefined
t.log @ /C:/Users/guikarist/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:282
/C:/Users/guikarist/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:282 [Extension Host] Here is the error stack:  TypeError: Cannot read property 'uri' of undefined
	at WorkspaceService.get rootPath [as rootPath] (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\common\application\workspace.js:18:104)
	at PipEnvService.getPipenvWorkingDirectory (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\interpreter\locators\services\pipEnvService.js:84:64)
	at PipEnvService.getInterpretersImplementation (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\interpreter\locators\services\pipEnvService.js:56:32)
	at PipEnvService.<anonymous> (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\interpreter\locators\services\cacheableLocatorService.js:42:22)
	at Generator.next (<anonymous>)
	at C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\interpreter\locators\services\cacheableLocatorService.js:18:71
	at new Promise (<anonymous>)
	at __awaiter (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\interpreter\locators\services\cacheableLocatorService.js:14:12)
	at PipEnvService.getInterpreters (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\interpreter\locators\services\cacheableLocatorService.js:36:16)
	at PythonInterpreterLocatorService.<anonymous> (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\interpreter\locators\index.js:54:120)
	at Generator.next (<anonymous>)
	at C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\interpreter\locators\index.js:16:71
	at new Promise (<anonymous>)
	at __awaiter (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\interpreter\locators\index.js:12:12)
	at locators.map (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\interpreter\locators\index.js:54:57)
	at Array.map (<anonymous>)
	at PythonInterpreterLocatorService.<anonymous> (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\interpreter\locators\index.js:54:39)
	at Generator.next (<anonymous>)
	at C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\interpreter\locators\index.js:16:71
	at new Promise (<anonymous>)
	at __awaiter (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\interpreter\locators\index.js:12:12)
	at PythonInterpreterLocatorService.getInterpreters (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\interpreter\locators\index.js:52:16)
	at InterpreterService.<anonymous> (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\interpreter\interpreterService.js:64:53)
	at Generator.next (<anonymous>)
	at C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\interpreter\interpreterService.js:16:71
	at new Promise (<anonymous>)
	at __awaiter (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\interpreter\interpreterService.js:12:12)
	at InterpreterService.getInterpreters (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\interpreter\interpreterService.js:63:16)
	at InvalidPythonInterpreterService.<anonymous> (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\application\diagnostics\checks\pythonInterpreter.js:63:59)
	at Generator.next (<anonymous>)
	at C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\application\diagnostics\checks\pythonInterpreter.js:18:71
	at new Promise (<anonymous>)
	at __awaiter (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\application\diagnostics\checks\pythonInterpreter.js:14:12)
	at InvalidPythonInterpreterService.diagnose (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\application\diagnostics\checks\pythonInterpreter.js:56:16)
	at ApplicationDiagnostics.<anonymous> (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\application\diagnostics\applicationDiagnostics.js:36:62)
	at Generator.next (<anonymous>)
	at C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\application\diagnostics\applicationDiagnostics.js:18:71
	at new Promise (<anonymous>)
	at __awaiter (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\application\diagnostics\applicationDiagnostics.js:14:12)
	at Promise.all.diagnosticsServices.map (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\application\diagnostics\applicationDiagnostics.js:35:79)
	at Array.map (<anonymous>)
	at ApplicationDiagnostics.<anonymous> (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\application\diagnostics\applicationDiagnostics.js:35:51)
	at Generator.next (<anonymous>)
	at C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\application\diagnostics\applicationDiagnostics.js:18:71
	at new Promise (<anonymous>)
	at __awaiter (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\application\diagnostics\applicationDiagnostics.js:14:12)
	at ApplicationDiagnostics.performPreStartupHealthCheck (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\application\diagnostics\applicationDiagnostics.js:33:16)
	at C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\extension.js:79:34
	at Generator.next (<anonymous>)
	at C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\extension.js:7:71
	at new Promise (<anonymous>)
	at __awaiter (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\extension.js:3:12)
	at activate (C:\Users\guikarist\.vscode\extensions\ms-python.python-2018.9.0\out\client\extension.js:70:12)
	at Function.t._callActivateOptional (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:626:411)
	at Function.t._callActivate (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:626:90)
	at c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:625:263
	at Object.g [as _notify] (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:78:971)
	at Object.enter (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:82:277)
	at n.Class.derive._oncancel._run (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:84:100)
	at n.Class.derive._oncancel._completed (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:83:559)
	at c (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:86:1011)
	at $.then.o.(anonymous function) (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:87:205)
	at Object.g [as _notify] (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:78:971)
	at Object.enter (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:82:277)
	at n.Class.derive._oncancel._run (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:84:100)
	at n.Class.derive._oncancel._completed (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:83:559)
	at c (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:86:1011)
	at $.then.o.(anonymous function) (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:87:205)
	at Object.g [as _notify] (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:78:971)
	at Object.enter (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:82:277)
	at n.Class.derive._oncancel._run (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:84:100)
	at n.Class.derive._oncancel._completed (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:83:559)
	at e.resolveOk (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:444:313)
	at t._receiveReply (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:640:117)
	at t._receiveOneMessage (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:638:551)
	at c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:635:926
	at c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:98:138
	at e.fire (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:99:496)
	at a (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:154:213)
	at Socket._socketDataListener (c:\Users\guikarist\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\node\extensionHostProcess.js:154:432)
	at emitOne (events.js:116:13)
	at Socket.emit (events.js:211:7)
	at addChunk (_stream_readable.js:263:12)
	at readableAddChunk (_stream_readable.js:250:11)
	at Socket.Readable.push (_stream_readable.js:208:10)
	at Pipe.onread (net.js:594:20)
/C:/Users/guikarist/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:3294 Activating extension 'ms-python.python' failed: Cannot read property 'uri' of undefined.
E._logMessageInConsole @ /C:/Users/guikarist/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:3294

[brettcannon]

Can you try uninstalling and re-installing the extension? We have seen this kind of failure before when installs go awry.

[terryzhao127]

Yes, I tried. I even reinstalled the vscode.

[terryzhao127]

Finally, I completely reinstalled the vs code (delete every folders in User Folder) and solved the problem.

[terryzhao127]

The bug came again when I create a workspace...
So now it has something to do with workspace.

[terryzhao127]

The extension just asked me to install pylint, then problems solved...

[marchom]

I am experiencing this behavior on ubuntu with vscode 1.28.2.
I have narrowed it down to a single directory created by another extension.

To reproduce:

• Install vs code v 1.28.2
• Install python (if not already present)
• install python extension from Microsoft
• install SSH FS extenison
• Reload
• Configure SSH FS to mount a remote location and connect to it to add it to Workspace
• Disconnect and remove the folder from workspace
• Restart vs code.
• At this point the above error will show up and Python extension will not load.

When I have both Python and SSH FS extensions, and I use SSH FS to mount some remote location, it creates the following:

~/.config/Code/Workspaces/some_workspace_id/workspace.json

which contains:

{ "folders": [], }

Usually this file will contain actual folders added to the workspace, but in this case SSH FS creates it empty.

If this still exists on a subsequent start of vscode, I get the above error. Note that this does not manifest immediately, but at next start. I have worked around it by adding:

# Delete buggy Workspace settings if it exists
BUGGY_DIR=~/.config/Code/Workspaces/
if [ -d "$BUGGY_DIR" ]; then rm -Rf $BUGGY_DIR; fi

to the top of

/usr/bin/code

Which is quite heavy-handed and, of course, at next update my "fix" will be wiped. There is probably another workaround where I could use cmp to only do this if the file contains empty list of folders but since I am not using workspaces for anything else, I'll pass for now. I'm not sure if this is a VSCode issue, a Python extension issue, or SSH FS issue, but my gut tells me that Python extension should account for an empty workspace...

Relevant log:

[18837:1108/220354.849642:INFO:CONSOLE(282)] "%c[IPC Library: File Watcher (nsfw)] %cStart watching: []
Stop watching: []", source: file:///usr/share/code/resources/app/out/vs/workbench/workbench.main.js (282)
[main 10:03:55 PM] windowsService#isFocused 1
[18837:1108/220356.792052:INFO:CONSOLE(282)] "%c[Extension Host] %cActivating extension 'ms-python.python' failed: Cannot read property 'uri' of undefined. %c(at Object.showMessage (/usr/share/code/resources/app/out/vs/workbench/node/extensionHostProcess.js:621:628))", source: file:///usr/share/code/resources/app/out/vs/workbench/workbench.main.js (282)
[18837:1108/220356.792152:INFO:CONSOLE(282)] "%c[Extension Host] %cActivating extension `ms-python.python` failed: ", source: file:///usr/share/code/resources/app/out/vs/workbench/workbench.main.js (282)
[18837:1108/220356.793470:INFO:CONSOLE(282)] "%c[Extension Host] %cHere is the error stack: ", source: file:///usr/share/code/resources/app/out/vs/workbench/workbench.main.js (282)
[18837:1108/220356.812187:INFO:CONSOLE(3294)] "Activating extension 'ms-python.python' failed: Cannot read property 'uri' of undefined.", source: file:///usr/share/code/resources/app/out/vs/workbench/workbench.main.js (3294)

[brettcannon]

@marchom if you would like to open a new issue to suggest we try to handle this case then please do.