Debugger - fails to "continue" with breakpoint set

Thomas Jollans thomas at
Wed Sep 15 21:04:28 CEST 2010

On Wednesday 15 September 2010, it occurred to Ed Greenberg to exclaim:
> I'm pretty new to Python, but I am really enjoying it as an alternative
> to Perl and PHP.
> When I run the debugger [import pdb; pdb.set_trace()] and then do next
> and step, and evaluate variables, etc, when I hit 'c' for continue, we
> go to the end, just fine.
> As soon as I set a breakpoint down the line, [b <line number>] the
> behavior of 'c' changes. Instead of continuing until the breakpoint, or
> until the end, if the breakpoint is hidden by a conditional, the
> debugger starts to treat 'c' as a step (or a next, I'm not sure which.)
> This behavior is repeatable and consistent.
> I see this in python 2.6.4 on Ubuntu 9.10 and also in 2.5.2 on Ubuntu
> 8.04 (Hardy), both using the installed packages.
> I must be missing something. Assistance will be welcome.

I can't reproduce this. Please post a small script and debugger session 
transcript that illustrate the problem clearly.

Maybe, on the way, you'll discover something you'd been missing. Maybe someone 
here will be able to help you then (maybe someone is now, but not me...). 
Maybe it's a bug (which it would be, if it behaves as you describe, but as I 
said, it appears to work for me).

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