> Anyway, let us know if you'll find something in perl5db.pl or somewhere else.
see http://cpansearch.perl.org/src/SHAY/perl-5.22.1/lib/perl5db.pl
line 405
=head4 C<@dbline>
Local alias to the magical line array, C<@{$main::{'_<'.$filename}}> ,
supplied by the Perl interpreter to the debugger. Contains the source.
and line 176
=head1 DATA STRUCTURES MAINTAINED BY CORE
There are a number of special data structures provided to the debugger
+ by
the Perl interpreter.
The array C<@{$main::{'_<'.$filename}}> (aliased locally to C<@dbline>
via glob assignment) contains the text from C<$filename>, with each
element corresponding to a single line of C<$filename>.
Seems to be magic. Dunno if it depends on debug flags or just the context of the DB package like other magic (e.g. @DB::args )
Anyway, let us know if you'll find something details about that magic. ;-).
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