[perl #60604] closure in grep?

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# New Ticket Created by  Ilya Belikin 
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Hi!
I start that message like bug report, but I have doubt.

example:

class A {
    method foo (@a) {
        @a.grep: { say @a }; # just for example, real code not so pointless
    }
}

my $o = A.new;

$o.foo(['foo']); # foo
$o.foo([1, 2]); # foo
                       # foo

Look like grep curls construct closure.
Mb it`s all right in perl6?

Ilya