Python debug adapter not starting

On my work machine I can nicely debug Python. However on my personal machine it is not working (it was previously working and I am not sure what changed in the meantime).

Here’s what I am seeing with a simple print(“hello”) script on my macOS:

1. I can run the python script using the run button
2. If I debug the python script it will not get executed and neither the breakpoints will get hit
3. It seems like starting the debug adapter fails because Karthik looked into the logs and they are completely empty
4. I can reproduce this with any combination of VS Code Stable, VS Code Insiders, Python Stable, Python Insiders
5. I can not reproduce if I tell Python to use Interpreter 2.7.16
6. I can reproduce if I use Python 3.9 64 bit and 3.8.9 64 bit
7. Debugging from the VS Code side it looks like the init call fails
8. I installed XCode 12 since this was last working. So this is my main suspect of the breakage.

Let me know what more information you need and I will be happy to provide it. Thanks a lot, really appreciate the help

My launch.json for reference:

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Python: Current File",
            "type": "python",
            "request": "launch",
            "program": "${file}",
            "console": "integratedTerminal"
        }
    ]
}

[weinand]

@isidorn I have no ideas…

For me Python debugging just works. My python path is: /Users/weinand/.pyenv/shims/python A week ago I installed XCode 13.0 and that did not change anything in my Python setup.

@deepak1556 for investigating Isidor’s problem, we started VS Code with the --inspect-extensions <port> command line argument, which puts the extension host node.js process in debug mode so that we can attach a debugger. But weirdly enough this prevents the problem from occurring.

Since the extension host runs in the Electron provided node.js, I wonder whether you are aware of any Electron/node.js issues that are related to spawning other programs on macOS (in this case the node.js based debug adapter for Python).

[isidorn]

Yes I did. That’s weird. Though all is working now so for me we do not have to continue the investigation. Deepak if you think there might be something useful hiding here let me know and we can debug it together.