[perl #118581] [BUG] Segfault for a signature match with a native type and an 'as' cast in Rakudo

[Christian Bartolomaeus via RT]

This no longer segfaults but gives False (on Moar, Parrot and JVM):

$ perl6 -e 'say \(1) ~~ :(int $x as Str)'
False

Is that smart match supposed to return True? (For the tests it would be nice to 
check for the correct result and not only whether it lives_ok.)