[perl #130415] multi dispatch calls multi with named args even when none are passed and named-arg-less candidate is available

[Zoffix Znet via RT]

I messed up the end of the ticket, should read:

Yet it still works like in the first case, if we turn off the
optimizer:

    $ perl6 --optimize=off test.p6
    there

Or give a name to the parameter:

    $ cat test.p6
    multi foo($, :$) { say "there"; }
    multi foo($x   ) { foo $x, $;   }
    foo 42;

$ perl6 test.p6
there