Debugger experiences FileNotFoundError internal error

[programmerPhysicist]

Type: Bug

Behavior

When I debug a test, instead of breaking at a known python error, it finishes the test and displays an internal error in the Debug Console:

Expected behavior:

It should hit a breakpoint at Project_Hype-Berry/source/hab_task.py:197 due to a KeyError, as I've seen when I run pytest --pdb in a terminal:

self = <hab_task.HabTask object at 0x7fcc6b2dd5d0>

    @property
    def dueToday(self):
        """This is intended to tell us if a given daily is due today or not."""
        if self.__task_dict['type'] == 'daily':
>           return self.__task_dict['isDue']
E           KeyError: 'isDue'

/home/alex/Workspace/temp/Project_Hype-Berry/source/hab_task.py:197: KeyError
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> entering PDB >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> PDB post_mortem (IO-capturing turned off) >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> /home/alex/Workspace/temp/Project_Hype-Berry/source/hab_task.py(197)dueToday()
-> return self.__task_dict['isDue']
(Pdb) 

Steps to reproduce:

Steps to reproduce:

1. Clone this repo: https://github.com/programmerPhysicist/Project_Hype-Berry
2. Checkout the branch vscode-bug: git checkout vscode-bug
3. Open VS Code with code . in the repo
4. Click on the "Testing" tab
5. Right click on "dailies_test.py" and select "Debug Test"
6. The following behavior

should be observed

Diagnostic data

launch.json configuration

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Debug oneWaySync",
            "type": "debugpy",
            "request": "launch",
            "program": "one_way_sync.py",
            "console": "integratedTerminal",
            "justMyCode": false,
            "cwd": "${workspaceFolder}/source/",
            "env": {"http_proxy":"", "https_proxy": ""},
        }
    ]
}

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

2025-03-14 22:05:45.055 [info] arg: --rootdir already exists in args, not adding.
2025-03-14 22:05:45.055 [info] Attempting to use temp directory for test ids file, file name: test-ids-768384ddf0dd243c05a7.txt
2025-03-14 22:05:45.056 [info] All environment variables set for pytest execution, PYTHONPATH: "/home/alex/.vscode/extensions/ms-python.python-2025.2.0-linux-x64/python_files:source"
2025-03-14 22:05:45.056 [info] Running DEBUG pytest with arguments: --rootdir=/home/alex/Workspace/temp/Project_Hype-Berry,--capture=no for workspace /home/alex/Workspace/temp/Project_Hype-Berry 

2025-03-14 22:05:45.056 [info] Using configuration in launch.json
2025-03-14 22:05:49.563 [error] Test Results named pipe /run/user/1000/python-test-results-c76a773a885ca60ec194 error: [TypeError: Cannot convert undefined or null to object
	at Function.keys (<anonymous>)
	at t.PythonResultResolver._resolveExecution (/home/alex/.vscode/extensions/ms-python.python-2025.2.0-linux-x64/out/client/extension.js:2:917078)
	at t.PythonResultResolver.resolveExecution (/home/alex/.vscode/extensions/ms-python.python-2025.2.0-linux-x64/out/client/extension.js:2:916387)
	at /home/alex/.vscode/extensions/ms-python.python-2025.2.0-linux-x64/out/client/extension.js:2:960049
	at b.callback (/home/alex/.vscode/extensions/ms-python.python-2025.2.0-linux-x64/out/client/extension.js:2:930145)
	at Object.thunk (/home/alex/.vscode/extensions/ms-python.python-2025.2.0-linux-x64/out/client/extension.js:2:1994360)]
2025-03-14 22:05:50.207 [info] Test Result named pipe /run/user/1000/python-test-results-c76a773a885ca60ec194  cancelled

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

2025-03-14 22:05:45.166 [info] Resolving launch configuration with substituted variables
2025-03-14 22:05:45.187 [info] DAP Server launched with command: /usr/bin/python3 /home/alex/.vscode/extensions/ms-python.debugpy-2025.4.1-linux-x64/bundled/libs/debugpy/adapter
2025-03-14 22:05:45.435 [info] Received 'debugpySockets' event from debugpy.
2025-03-14 22:05:45.438 [info] Received 'debugpySockets' event from debugpy.
2025-03-14 22:05:45.439 [info] Received 'debugpySockets' event from debugpy.
2025-03-14 22:05:45.929 [info] Received 'debugpySockets' event from debugpy.
2025-03-14 22:05:50.199 [info] Received 'debugpySockets' event from debugpy.
2025-03-14 22:05:50.205 [info] Received 'debugpySockets' event from debugpy.

Extension version: 2025.4.1
VS Code version: Code 1.98.2 (ddc367ed5c8936efe395cffeec279b04ffd7db78, 2025-03-12T13:32:45.399Z)
OS version: Linux x64 5.15.0-134-generic
Modes:

• Python version (& distribution if applicable, e.g. Anaconda): 3.10.12
• Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Unknown

System Info

Item	Value
CPUs	AMD Ryzen 3 3200U with Radeon Vega Mobile Gfx (4 x 2915)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: enabled_on direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off video_decode: enabled video_encode: disabled_software vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: disabled_off webnn: disabled_off
Load (avg)	1, 1, 1
Memory (System)	5.72GB (1.35GB free)
Process Argv	.
Screen Reader	no
VM	0%
DESKTOP_SESSION	cinnamon
XDG_CURRENT_DESKTOP	X-Cinnamon
XDG_SESSION_DESKTOP	cinnamon
XDG_SESSION_TYPE	x11

[eleanorjboyd]

thanks for the detailed bug report- I will investigate

[eleanorjboyd]

able to repro- thanks for the steps. I am seeing pathlib.Path.cwd() set to cwd = PosixPath('/private/var/folders/q8/17wzg0cx7p59c1qfvwxx8yhc0000gn/T/pytest-of-eleanorboyd/pytest-12/config0') for me. Are you mocking it out somehow. I wasn't able to see in the code where that might be but it is being adjusted which would cause the problem there

[programmerPhysicist]

In this case it isn't being mocked. The test is setup to change the cwd.

[programmerPhysicist]

Even then, it should should return the cwd.

[github-actions]

Hey @eleanorjboyd, this issue might need further attention.

@programmerPhysicist, you can help us out by closing this issue if the problem no longer exists, or adding more information.

[eleanorjboyd]

In the test, is the cwd reverted to the original cwd after the test finishes? This code was designed to run the tests (cleanup is called if included) then get the original path and use this to return the info. By the time "python_report_status" hook is hit, the changes made in a test should be undone right? If you are reseting the cwd at the end of the test can you include a minimum repro of what the test does in this issue so I can try it myself and whats going wrong

[programmerPhysicist]

In the test, is the cwd reverted to the original cwd after the test finishes?

I don't do anything to revert it, but I wonder if pytest does after the test finishes.

[eleanorjboyd]

seems like i need an API key- is that true to run the tests in this repo? I followed the setup instructions in the readme and getE ModuleNotFoundError: No module named 'todoist_api_python.endpoints'. Also are you using symlinks at all? Wondering if your issue is the same as here: microsoft/vscode-python#23101. I guess we could go with the strategy proposed in this issue of getting the cwd before any other action and saving it but this could call some issues with symlinks. Also I wasn't able to find the mocking of the cwd in your project- could you provide a code link? Thanks

[programmerPhysicist]

• An API key is not needed for the tests. (The tests create a file with a fake API keys, but it shouldn't talk to a server).
• cwd isn't mocked.
• The symlinks I'm using shouldn't be relevant to the tests.
• Might have to look more into ModuleNotFoundError: No module name thing. I haven't seen it, but doesn't mean it isn't a problem.