Bug report

Bug description:

Hello everyone,

With Python 3.13, pdb doesn't pass arguments like -b or --bar to a script while it works fine with Python 3.12.

test.py

import sys
print(' '.join(sys.argv))

✅ Good:

$ python3.13 -m pdb -c continue -c quit test.py foo
test.py foo
The program finished and will be restarted

🐛 Bad:

$ python3.13 -m pdb -c continue -c quit test.py foo --bar
usage: pdb [-h] [-c command] (-m module | pyfile) [args ...]
pdb: error: unrecognized arguments: --bar

✅ Good:

$ python3.12 -m pdb -c continue -c quit test.py foo --bar
test.py foo --bar
The program finished and will be restarted

Best regards!

CPython versions tested on:

3.13

Operating systems tested on:

Linux

Linked PRs

gh-125115: Pass unknown pdb command line args to script instead of fail #125424
[3.13] gh-125115: Pass unknown pdb command line args to script instead of fail (GH-125424) #125547
gh-125115 : Refactor the pdb parsing issue so positional arguments can pass through #140933
[3.14] gh-125115 : Refactor the pdb parsing issue so positional arguments can pass through (GH-140933) #141635