im2ee's TCP server, exposes funny failures in IO::Select

gistfile1.txt

use IO::Select;

class TCP::Server::Simple {

	has Int $.port is rw = 6611;
	has Str $.host is rw = 'localhost';
	has IO::Socket::INET $!listener;
	has @!connections; # all ready connections
	has Str $!request; # requests from clients
	has $!sock is rw = IO::Select.new();

	method run () { self!server(); }

	method !server () {
		self!setup_listener();
		loop {
			#@!connections = $!sock.can_read(1); # all ready clients
			#next unless @!connections;
            if $!sock.poll(nqp::unbox_i(1), nqp::unbox_i(1), nqp::unbox_i(0));
            say @!connections.perl;
			for @!connections -> $fh {
				if $fh == $!listener { # is there any client to accept?
					$!sock.add($!listener.accept);
				} else { # if not, do all stuff
					my @recved = self!recv();
					say @recved;
				}
			}
		}
	}

	method !recv () { # get messages from all clients
		my @recv;
		for @!connections {
			@recv.push(.recv().chomp);
		}
		return @recv; # return array with messages
	}

	method !setup_listener() { # setup a listener
		my $host = $.host; my $port = $.port;
		$!listener = IO::Socket::INET.new(
			:localhost($host), # default: localhost
			:localport($port), # default: 6611
			:listen, # 1
		);
	}

}

my $conn = TCP::Server::Simple.new( host => 'localhost', port => 8080 );
$conn.run; # run a Simple TCP Server!