>perl -d \pl_test\test{{.pl

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

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

main::(\pl_test\test{{.pl:5):
5:      my @i = (2..5);
  DB<1> {{ #
  DB<2> r
foo 3
foo 4
foo 5
foo 6
Debugged program terminated.  Use q to quit or R to restart,
  use o inhibit_exit to avoid stopping after program termination,
  h q, h R or h o to get additional info.
auto(-1)  DB<2> #

  DB<2>
...