// run-pass
#![allow(unused_mut)]
#![allow(unused_assignments)]

use std::sync::mpsc::channel;

pub fn main() { test00(); }

fn test00() {
    let mut r: isize = 0;
    let mut sum: isize = 0;
    let (tx, rx) = channel();
    let mut tx0 = tx.clone();
    let mut tx1 = tx.clone();
    let mut tx2 = tx.clone();
    let mut tx3 = tx.clone();
    let number_of_messages: isize = 1000;
    let mut i: isize = 0;
    while i < number_of_messages {
        tx0.send(i + 0).unwrap();
        tx1.send(i + 0).unwrap();
        tx2.send(i + 0).unwrap();
        tx3.send(i + 0).unwrap();
        i += 1;
    }
    i = 0;
    while i < number_of_messages {
        r = rx.recv().unwrap();
        sum += r;
        r = rx.recv().unwrap();
        sum += r;
        r = rx.recv().unwrap();
        sum += r;
        r = rx.recv().unwrap();
        sum += r;
        i += 1;
    }
    assert_eq!(sum, 1998000);
    // assert (sum == 4 * ((number_of_messages *
    //                   (number_of_messages - 1)) / 2));

}