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 | // run-pass
#![allow(unused_must_use)]
// ignore-emscripten no threads support
use std::thread;
use std::sync::mpsc::channel;
pub fn main() {
    let (tx, rx) = channel::<usize>();
    let x: Box<isize> = Box::new(1);
    let x_in_parent = &(*x) as *const isize as usize;
    let t = thread::spawn(move || {
        let x_in_child = &(*x) as *const isize as usize;
        tx.send(x_in_child).unwrap();
    });
    let x_in_child = rx.recv().unwrap();
    assert_eq!(x_in_parent, x_in_child);
    t.join();
}
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