vscode-jupyter: Python debugger dataviewer is broken if multiprocessing is used at some point earlier in the script

Applies To

• Notebooks (.ipynb files)
• Interactive Window and/or Cell Scripts (.py files with #%% markers)

What happened?

When debugging a python file (OS : Windows, Environnement : Anaconda), right clicking on a numpy array or a pandas dataframe in the “variables” side panel offers the option to “view the value in the data viewer” (it might not be the exact words, my vscode install is configured in another language).

When I click on it, an error appears : “Cannot read properties of undefined (reading ‘disposed’)”. And nothing else happens.

I tried with both the prerelease and commercial versions of Jupyter, to no avail.

In the Jupyter logs, “xxxx” is my Windows session username

Here is my lanch.json code for the debugging configuration I’m using :

{ "version": "0.2.0", "configurations": [ { "name": "Python : fichier actif", "type": "python", "request": "launch", "program": "${file}", "console": "integratedTerminal", "justMyCode": false } ] }

VS Code Version

Version : 1.75.1 (user setup) Validation : 441438abd1ac652551dbe4d408dfcec8a499b8bf Date : 2023-02-08T21:32:34.589Z Electron : 19.1.9 Chromium : 102.0.5005.194 Node.js : 16.14.2 V8 : 10.2.154.23-electron.0 Système d’exploitation : Windows_NT x64 10.0.19044 Sandboxé : No

Jupyter Extension Version

v2023.1.2010391206 AND v2023.2.1000461014

Jupyter logs

info 17:57:03.945: Found debugAdapterPython on Debug Configuration to use
info 17:57:04.764: Process Execution: > c:\Anaconda3\python.exe -c "import pandas;print(pandas.__version__)"
> c:\Anaconda3\python.exe -c "import pandas;print(pandas.__version__)"
error 17:57:05.365: [TypeError: Cannot read properties of undefined (reading 'disposed')
	at Zh (d:\xxxx\.vscode\extensions\ms-toolsai.jupyter-2023.2.1000461014\out\extension.node.js:17:165040)
	at ef.getDataFrameInfo (d:\xxxx\.vscode\extensions\ms-toolsai.jupyter-2023.2.1000461014\out\extension.node.js:17:165522)
	at async Fk.ensureInitialized (d:\xxxx\.vscode\extensions\ms-toolsai.jupyter-2023.2.1000461014\out\extension.node.js:24:519924)
	at async Fk.getDataFrameInfo (d:\xxxx\.vscode\extensions\ms-toolsai.jupyter-2023.2.1000461014\out\extension.node.js:24:518749)
	at async Ek.onVariablePanelShowDataViewerRequest (d:\xxxx\.vscode\extensions\ms-toolsai.jupyter-2023.2.1000461014\out\extension.node.js:24:510752)
	at async s.h (d:\xxxx\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\api\node\extensionHostProcess.js:96:108008)]
warn 17:57:05.366: DataScience Error [TypeError: Cannot read properties of undefined (reading 'disposed')
	at Zh (d:\xxxx\.vscode\extensions\ms-toolsai.jupyter-2023.2.1000461014\out\extension.node.js:17:165040)
	at ef.getDataFrameInfo (d:\xxxx\.vscode\extensions\ms-toolsai.jupyter-2023.2.1000461014\out\extension.node.js:17:165522)
	at async Fk.ensureInitialized (d:\xxxx\.vscode\extensions\ms-toolsai.jupyter-2023.2.1000461014\out\extension.node.js:24:519924)
	at async Fk.getDataFrameInfo (d:\xxxx\.vscode\extensions\ms-toolsai.jupyter-2023.2.1000461014\out\extension.node.js:24:518749)
	at async Ek.onVariablePanelShowDataViewerRequest (d:\xxxx\.vscode\extensions\ms-toolsai.jupyter-2023.2.1000461014\out\extension.node.js:24:510752)
	at async s.h (d:\xxxx\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\api\node\extensionHostProcess.js:96:108008)]

Coding Language and Runtime Version

Python 3.9.7

Language Extension Version (if applicable)

No response

Anaconda Version (if applicable)

conda 4.10.3

Running Jupyter locally or remotely?

None