Just FYI and not really apropos of much,  ::default() works as well and avoids possible &-ish complications: 

>perl -wMstrict -le
"use 5.10.0;
 ::default();
 sub default { print 'works' }
 given ('x') {
   when ('y') { print 'y'       }
   default    { print 'default' }
   }
"
works
default

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In reply to Re: "use 5.10.0" creates weird syntax error on sub named "default" by AnomalousMonk
in thread "use 5.10.0" creates weird syntax error on sub named "default" by aixtal

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