[perl #130245] leaky nqp internals on postfix:<.>

[via RT]

# New Ticket Created by  Wenzel Peppmeyer 
# Please include the string:  [perl #130245]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=130245 >


class C {}; role R {}; sub postfix:<.>(C:D $c){ $c but R }; my $c = C.new; $c.
# OUTPUT
# rakudo-moar abc643: OUTPUT«===SORRY!===␤Cannot find method 'ast' on object of 
type NQPMu␤»

# see: https://irclog.perlgeek.de/perl6-dev/2016-12-02#i_13669854