pdb shows wrong line numbers for modules

[artemmukhin]

Bug report

1. Create foo.py containing a = 1
2. ./python -m pdb foo.py

Results in

./python -m pdb foo.py
./foo.py(1)<module>()
-> a = 1
(Pdb) longlist
 0 a = 1
(Pdb) 

The line number should be 1 instead of 0.

This occurs because the longlist command uses inspect.getsourcelines, which returns 0 as the starting line number for modules.

This bug was introduced in #101674.

Your environment

• CPython versions tested on: main

Linked PRs

• GH-103319: Fix inspect.getsourcelines() to return 1-based line numbers #103226
• gh-103225: Fixed zero lineno issue for pdb #103265
• [3.11] gh-103225: Fixed zero lineno issue for pdb (#103265) #104262

[hauntsaninja]

Thanks for reporting! Closing, since the pdb issue is fixed and #103319 can track whether we want to change behaviour in inspect or not