Step Over/Into/Out does not stop in sub-process for Python 3.12

[KindRoach]

Reproduce

Platform: Linux

Debug below script with python 3.12:

from multiprocessing import Process, current_process


def subprocess_task():
    print(f"[Subprocess] Name: {current_process().name}")
    print(f"[Subprocess] Name: {current_process().name}") # breakpoint here 
    print(f"[Subprocess] Name: {current_process().name}") # step over does not stop here
    print(f"[Subprocess] Name: {current_process().name}")


if __name__ == "__main__":
    print(f"[Main Process] Name: {current_process().name}")
    print(f"[Main Process] Name: {current_process().name}") # breakpoint here
    print(f"[Main Process] Name: {current_process().name}") # step over stop here
    print(f"[Main Process] Name: {current_process().name}")

    p = Process(target=subprocess_task, name="MySubprocess")
    p.start()
    p.join()

For Python 3.11 or 3.10, everything works fine.

[eleanorjboyd]

Hi could you elaborate a bit more here on what you are seeing vs what you expect?

[KindRoach]

Python 3.12 step over does not stop at line 7. The program execute all 3 lines of code and exit.

Python 3.10 step over stop at line 7. Execute one line for each click.

[eleanorjboyd]

thank you- will investigate

[jborean93]

This is a dup of #719. The underlying issue was in debugpy and has been fixed in the latest release 1.8.15. Just need to wait until this extension updates the copy of debugpy they ship with to the new version. Otherwise you can install your own debugpy and use the debugAdapterPath to point to that custom install.