[perl #126252] Lexical character classes cannot be used for complement or combined

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# New Ticket Created by  Ron Schmidt 
# Please include the string:  [perl #126252]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=126252 >


The last two cases below fail and they should not.  The problem was discussed 
on IRC here: http://irclog.perlgeek.de/perl6/2015-10-02#i_11309820 .

The error in both cases on my system reads:
Method 'hexlet' not found for invocant of class 'Cursor'
  in block <unit> at unreserved.pl6:11

my token hexlet { <[A..F]> }

grammar G {
        token TOP { <- hexlet> }
        token hexlet { <[A..F]> }
} 

say so G.parse('.');
say so G.parse('A');
say so '.' ~~ /<- alpha>/;
try { say so '.' ~~ /<- hexlet>/ }
say $!;
try { say so '.' ~~ /<[Q..Z] + hexlet>/ }
say $!;