Nil ?

[ToddAndMargo]

What am, I missing?

$ p6 'my $x; if $x =:= Nil { say "Nil" } else { say "Not Nil"; };'
Not Nil

$ p6 'my $x = Nil; if $x =:= Nil { say "Nil" } else { say "Not Nil"; };'
Not Nil