[perl #131395] Using a cross meta operator on an empty list complains about not supporting elems

[Zoffix Znet via RT]

https://irclog.perlgeek.de/perl6/2017-05-29#i_14654174

16:54   bisectable6     MasterDuke, bisect log: 
https://gist.github.com/7d49ce1401bee0ab3127c5d1be2a919e
16:54                   MasterDuke, (2017-01-16) 
https://github.com/rakudo/rakudo/commit/8a3ff7b64b51a66e0e90437bbeb4793534a07026

16:57   Zoffix  m: use nqp; nqp::elems(nqp::getattr((), List, '$!reified'))
16:57   camelia rakudo-moar a18c06: OUTPUT: «This type (Scalar) does not 
support elems␤  in block <unit> at <tmp> line 1␤␤»


17:00           m: use nqp; dd nqp::getattr((), List, '$!reified').^name; dd 
nqp::getattr([], List, '$!reified').^name
17:00   camelia rakudo-moar a18c06: OUTPUT: «"Mu"␤"IterationBuffer"␤»
17:00   Zoffix  Both prolly should be the same? So this bug doesn't occur 
elsewhere?