source code string cannot contain null bytes

[gian-didom]

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Environment data

• debugpy version: 1.8.1
• OS and version: MacOS Ventura
• Python version (& distribution if applicable, e.g. Anaconda): Python 3.13.1 (main, Dec 3 2024, 17:59:52) [Clang 16.0.0 (clang-1600.0.26.4)] on darwin
• Using VS Code or Visual Studio: VS Code

Actual behavior

Suddenly, when debugging worked just fine in VS Code, I now get an error while trying to start my application in debug mode.
The error I get is this:

source code string cannot contain null bytes

And happens in runpy.py when loading the code variable. The code.co_filename value is '.../.vscode/extensions/ms-python.debugpy-2024.8.0-darwin-arm64/bundled/libs/debugpy/adapter/../../debugpy/launcher/../../debugpy/__main__.py'

I tried the following:

• Delete all pycache in project directory --> No result
• Delete all pycache in debugpy folder --> No result
• Delete and re-save the main.py found in debugpy folder --> No result
• Change debugpy main.py to only print a message --> Message is printed if immediately before line 66 ( import debugpy # noqa)
• Change my source code to a simple print("Hello world!") --> Issue persists
• Reinstall debugpy from VS Code --> Issue persists
• Uninstall debugpy and reinstall debugpy from VS Code --> Issue persists

Expected behavior

I'd expected the debugger to run just fine as it did this morning.

Steps to reproduce:

1. Run debugging from VS Code with the following configuration:

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Debugger Python: File corrente",
            "type": "debugpy",
            "request": "launch",
            "program": "${workspaceFolder}/.venv/bin/python3",
            "console": "integratedTerminal",
            "justMyCode": false
        }
    ]
}

[gian-didom]

Closing because the "program" field was uncorrectly set to the .venv interpreter instead of the .py file, causing the python to load binary code.