[perl #127973] [BUG] native strings not allowed to be as big as regular strings

[Jan-Olof Hendig via RT]

On my 32 bit Linux VM:

dogbert@dogbert-VirtualBox ~ $ perl6 -v
This is Rakudo version 2017.09-348-g830084430 built on MoarVM version 
2017.09.1-575-gd4e230a69
implementing Perl 6.c.
dogbert@dogbert-VirtualBox ~ $ time perl6 -e 'my str $a = "a" x 2**30; say 
$a.chars'
1073741824

real    0m0.173s
user    0m0.176s
sys     0m0.032s

Seems plenty fast.