payload not being killed also nontermination

my $max = 10 ;

my $kill-in = 5 ;

my $main-supply = supply {
        for 1..$max {
                sleep 1 ;
                emit $_ ;
        }
        done() ;
}


class Payload {
        has $.promise ;
        has $.name ;
        has $!kill-supplier ;

        method kill() {
                say "kill called for $.name" ;
                $!kill-supplier.emit("kill") ;
        }
}


sub launch($name, $supply) {
        my $kill-supplier = Supplier.new() ;
        my $kill-supply = $kill-supplier.Supply ;
        # my $kill-tap = $kill-supply.tap() ;
        my $promise = start {
                react {
                        whenever $supply {
                                say $name ~ ": " ~ $_ ;
                        }

                        whenever $kill-supply {
                                say "Shutting Down: " ~ $name ;
                                done() ;
                        }

                }
        }
        return Payload.new(name => $name, promise => $promise , kill-supplier => $kill-supplier) ;
}

my $payload = launch("Bobby", $main-supply) ;

Promise.in($kill-in).then({ say "Trying to kill the payload..." ; $payload.kill() }) ;

await $payload.promise ;