Regression in inspect.getsourcelines from 3.13.7 to 3.13.8

[itamaro]

Bug report

Bug description:

It seems that 3.13.8 introduced a breaking change in how inspect.getsourcelines handles comments between a decorator and the function being decorated

Minimal reproducer:

import inspect

def decorate(func):
    return func

@decorate
# harmless comment
def spam() -> None:
    pass

print(inspect.getsourcelines(spam))

output with 3.13.7:

(['@decorate\n', 'def spam() -> None:\n', '    pass\n'], 7)

output with 3.13.8 (the pass line is missing):

(['@decorate\n', '# harmless comment\n', 'def spam() -> None:\n'], 6)

there's also a difference in the line number for some reason

CPython versions tested on:

3.13

Operating systems tested on:

Linux

[StanFromIreland]

Can you please try bisecting the commit?

[itamaro]

Can you please try bisecting the commit?

working on it. wanted to file the issue as soon as I had a minimal reproducer.

[itamaro]

bisects to c04b3de
cc @serhiy-storchaka

[picnixz]

This is fixed in #139783

[itamaro]

This is fixed in #139783

thanks, sorry for the dup report! my searching failed me

[picnixz]

No worry! my title might not be the best one either :')