[perl #118717] [BUG] Nil is not supposed to be an iterator anymore in Rakudo

[Christian Bartolomaeus via RT]

As a status update: Nil is no longer an iterator:

$ perl6 -e 'say Nil.^mro'
Nil (Cool) (Any) (Mu)

But the recently introduced Empty is:

$ perl6 -e 'say Empty.^mro'
Empty (Iterator) (Iterable) Nil (Cool) (Any) (Mu)