有人能解释一下，为什么如果我从for_each中删除“move”，程序就会挂起？

use std::sync::mpsc::channel;
fn main() {
    let v = vec![0,1,2,3,4,5,6,7,8,9];
    let (tx, rx) = channel();
    v.iter().for_each(move |&elem| {
        tx.send(elem).unwrap();
    });
    println!("Tx'ed");

    let rx_vec: Vec<_> = rx.iter().collect();

    println!("Collected into vec");
}

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