[perl #66538] [BUG] Rakudo falls in the infinite loop in Range with non-ascii

[via RT]

# New Ticket Created by  Hojung Yoon 
# Please include the string:  [perl #66538]
# in the subject line of all future correspondence about this issue. 
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=66538 >


parrot revision is "r48955".
rakudo version is "#17, Stockholm" and current.

$ perl6 -e '  "가".."나"  '
$ perl6 -e '  "あ".."は"  '

above command line falls in the infinite loop.
PS: I haven't checked if this happens with any non-ascii strings.