http://www.perlmonks.org?node_id=1017148


in reply to Perl debugging issue

We need more infos what you did!

Did you manually try to set a breakpoint? Maybe in a BEGIN-block?

If not, do you have any debugger code in your script?

Try grepping for things starting with "DB::"

Cheers Rolf

UPDATE

Not every source line results in an atomic step at run-time where you can set a breakpoint.

e.g.

See the following snippet from "Programming Perl" for examples:

To look at a "window" of source code around the breakpoint, use the w command:

DB<2> w 5 } 6 7 sub infested { 8==>b my $bugs = int rand(3); 9: our $Master; 10: contaminate($Master); 11: warn "needs wash" 12 if $Master && $Master->isa("Human"); 13 14: print "got $bugs\n"; DB<2>

As you see by the ==> marker, your current line is line 8, and by the b there, you know it has a breakpoint on it. If you had set an action, there also would also have been an a there. The line numbers with colons are breakable; the rest are not.