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B.15. Debugging
There''s a very good debugger that comes with Perl and supports
breakpoints, watchpoints, single-stepping, and generally everything
you''d want in a command-line Perl debugger. It''s actually written
in Perl (so, if there are bugs in the debugger, we''re not sure
how they get those out). But that means that, in addition to all of
the usual debugger commands, you can actually run Perl code from the
debugger -- calling your subroutines, changing variables, even
redefining subroutines -- while your program is running. See the
perldebug manpage for the latest details.
Another debugging tactic is to use the
B::Lint module, which is still preliminary as of
this writing.
