Here is a cut and paste of the debugger h b command:

pp2@nereida:~/src/perl/testing$ perl -wd namevsref.pl

Loading DB routines from perl5db.pl version 1.28
Editor support available.

Enter h or `h h' for help, or `man perldebug' for more help.

main::(namevsref.pl:4): my $time = 1;
  DB<1> h b
b        Sets breakpoint on current line)
b [line] [condition]
        Set breakpoint; line defaults to the current execution line;
        condition breaks if it evaluates to true, defaults to '1'.
b subname [condition]
        Set breakpoint at first line of subroutine.
b $var        Set breakpoint at first line of subroutine referenced by
+ $var.
b load filename Set breakpoint on 'require'ing the given file.
b postpone subname [condition]
        Set breakpoint at first line of subroutine after
        it is compiled.
b compile subname
        Stop after the subroutine is compiled.
  DB<2>
[download]

The b $var does not say the sub referenced by $var must be named?

Thanks all of you

Casiano