gistfile1.txt

$ cat test.p6 
multi f([]) { () }

multi f(@list) {
    say @list.perl;
}

my @a = ();
f(@a);

my @b = (1,2,3);
f(@b);
$ ./perl6 test.p6 
No applicable candidates found to dispatch to for 'f'. Available candidates are:
:(Positional  ())
:(@list)

  in main program body at line 11:test.p6