[perl #114554] [BUG] Definition of zero-length postfix operator wrongly allowed in Rakudo

[Matthew Wilson via RT]

new behavior:

13:30 <diakopter> m: sub postfix:{}($a) { say "$a bracey brace" }; 42{}
13:30 <camelia> rakudo-moar 61d231: OUTPUT«===SORRY!===␤Internal error: 
find_var_decl could not find $_␤»