If your debugger is incompatible with the 'each' magic, then the options are: use a different debugger, or don't use each.

A simple way to work around each would be to load it into an array and simulate each as follows:

$ perl -e '
> my %h=(qw(a b c d e f));
> { my @each = %h;
>   while (my $k = shift @each) {
>     my $v = shift @each;
>     print "$k => $v\n";
> }}' 
c => d
e => f
a => b
[download]