std::sync::Arc odd behavior

[ghigt]

First, sorry if it is not a bug but the normal behavior.

I can't seem to understand why this two programs give a different answer (try):

use std::sync::Arc;

fn main() {
    let numbers = vec![1i, 2i, 3i];
    let numbers = Arc::new(numbers);

    for num in range(0u, 3) {
        let (tx, rx)  = channel();
        tx.send(numbers.clone());

        spawn(proc() {
            let numbers = rx.recv();
            println!("{:d}", *numbers.get(num as uint));
        })
    }
}

Gives this result: 3 2 1
Changing the numbers declaration by (try):

let numbers = Arc::new(vec![1i, 2i, 3i]);

Gives this result: 3 1 2
Also changing the order like that (try):

let numbers = Arc::new(vec![3i, 2i, 1i]);

Give this result: 1 2 3

[ghigt]

my bad, concurrency...