microsoft/debugpy

Debugger is entering runpy.py for no reason

ibobak opened this issue · 6 comments

ibobak commented

Type: Bug

Behaviour

When debugging the following code I am redirected to some internal module - see below.
This should not happen.

Steps to reproduce:

Use this code:

class Node:
    def __init__(self, a_val) -> None:
        self.val = a_val
        self.next = None
    
    def __eq__(self, value: object) -> bool:
        if isinstance(value, Node):
            return self.val == value.val
        return False
        
a = Node(20)
b = Node(20)

print(a==b)

on this line:
image

after pressing F10 I will get this:
image

My shortcuts
image

Diagnostic data

launch.json configuration 

XXX

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

XXX

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

XXX

Extension version: 2024.6.0
VS Code version: Code 1.89.1 (dc96b837cf6bb4af9cd736aa3af08cf8279f7685, 2024-05-07T05:16:23.416Z)
OS version: Linux x64 6.4.6-060406-generic
Modes:

  • Python version (& distribution if applicable, e.g. Anaconda): 3.10.9
  • Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Conda
System Info
Item Value
CPUs Intel(R) Xeon(R) CPU E5-2696 v4 @ 2.20GHz (88 x 1197)
GPU Status 2d_canvas: enabled
canvas_oop_rasterization: disabled_off
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
Load (avg) 1, 1, 1
Memory (System) 251.76GB (87.86GB free)
Process Argv --crash-reporter-id 27d42247-63fb-4d9e-9cb0-87d9974843dc
Screen Reader no
VM 50%
DESKTOP_SESSION ubuntu-xorg
XDG_CURRENT_DESKTOP Unity
XDG_SESSION_DESKTOP ubuntu-xorg
XDG_SESSION_TYPE x11
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paulacamargo25 commented

Thanks for the bug report, could you share the config in your launch.json file? and the value of Just My Code in settings. Thanks

ibobak commented

launch.json

{
    // 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": "Python Debugger: Current File",
            "type": "debugpy",
            "request": "launch",
            "program": "${file}",
            "console": "integratedTerminal"
        }
    ]
}

image
image
image

paulacamargo25 commented

It seems like a problem with debugpy. Could you try again with the latest version of the extension? We updated the debugpy version to the latest.

ibobak commented

The problem is still fully reproducible with the newest version: https://youtu.be/Bayb3c6pvEo

rchiodo commented

That's the last line of execution and you have justMyCode turned off. It's stepping into the code that called you. (running under the debugger launches the program differently)

This should be by design. I don't believe pydevd modules are special cased to not count towards stepping when justMyCode is false.

rchiodo commented

Yeah it's the runpy in the system runtime, so it's not even stepping through the debugger code. It's stepping through the code that's running in the system.

I suppose we could special case this situation to detect that it's the last line of the program? Seems like overkill though.