use Data::Dumper; $Data::Dumper::Purity = 1; # This makes no difference my $a = "\x0d\x0a"; print "Initial length: ", length($a), "\n"; my $dump = Data::Dumper->Dump([$a], [qw(a)]); print "Dumped code with Useqq = 0:\n", $dump; eval $dump; print "New length after eval: ", length($a), "\n"; $Data::Dumper::Useqq = 1; $dump = Data::Dumper->Dump([$a], [qw(a)]); print "Dumped code with Useqq = 1:\n", $dump; eval $dump; print "New length after eval: ", length($a), "\n";