Unfortunately it doesn't work in perl5db.pl v1.30 :-(
After "{{ #" statements are still getting executed.
$ perl -v
This is perl, v5.10.0 built for cygwin-thread-multi-64int
(with 6 registered patches, see perl -V for more detail)
$ perl -d bla.pl
Loading DB routines from perl5db.pl version 1.3
Editor support available.
Enter h or `h h' for help, or `man perldebug' for more help.
main::(bla.pl:5): my @i = (2..5);
DB<1> {{ #
DB<2> s
main::(bla.pl:7): for my $i (@i) {
auto(-1) DB<2> #
DB<2> s
main::(bla.pl:8): $i ++;
auto(-1) DB<2> #
DB<2> s
main::(bla.pl:9): print "foo";
auto(-1) DB<2> #
DB<2> s
main::(bla.pl:10): print " $i\n";
auto(-1) DB<2> #
foo
print+qq(\L@{[ref\&@]}@{['@'x7^'!#2/"!4']});