DB<4> f evals.pl
1:      use strict;
2:      use warnings;
3
4:      my ($a, $b) = (1, 9);
5
6:      my $x = eval q {
7         $a = 2;
8         $b = 3;
9         print "$b\n";
10        $a+$b;
  DB<5> c 15
3
main::(evals.pl:15):    my $y = eval '$a+$b';
  DB<6> n
main::((eval 8)[evals.pl:15]:1):        $a+$b
  DB<6> l (eval 8)
1==>    $a+$b
2       ;
  DB<7> c
5
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.
  DB<7>