[perl #77104] Rakudo doesn't like WhateverCode ranges in postcircumfix:<[ ]>

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# New Ticket Created by  Moritz Lenz 
# Please include the string:  [perl #77104]
# in the subject line of all future correspondence about this issue. 
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=77104 >


10:01 < moritz_> rakudo: say <a b c>[0..*-2]
10:01 <+p6eval> rakudo 38f9f1: OUTPUT«Method 'Num' not found for
invocant of
                class 'WhateverCode'␤  in 'Cool::Numeric' at line
                1757:CORE.setting␤  in 'Cool::Numeric' at line
                1758:CORE.setting␤  in 'infix:<==>' at line
6581:CORE.setting␤
                in 'Range::iterator' at line 4557:CORE.setting␤  in
                'Any::postcircumfix:<[