Memory leak

Eval problem

use v6;
use MONKEY-SEE-NO-EVAL;

class T {
    has &.app;

    method loc() {
    	  EVAL('sub app() {say 5}');
    }

    method tst() {
    	  &!app //= self.loc;
	  return &!app;
    }
}

loop { 
    my $t = T.new;
    my &app = $t.tst;
}