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

[Christian Bartolomaeus via RT]

A status update after the GLR:

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

$ perl6 -e 'say Empty.^mro'
((Slip) (List) (Cool) (Any) (Mu))

So neither Nil nor Empty is Iterator anymore.