coherence failed to report ambiguity

[tograd]

I'm a newbie messing about so I couldn't say if this has been reported before or not (certainly similar ones has been.)

use std::sync::{Arc, Mutex};
use std::thread;
use std::sync::mpsc::channel;


fn main() {

    let channel_collector = Arc::new(Mutex::new(vec!()));

    thread::spawn(move || {

        let (tx, rx) = channel();

        {
            let mut cc = channel_collector.lock().unwrap();
            cc.push(rx); // or tx
        }

    });
}

<anon>:11:5: 11:18 error: internal compiler error: coherence failed to report ambiguity: cannot locate the impl of the trait `core::marker::Send` for the type `[closure <anon>:11:24: 20:6]`
<anon>:11     thread::spawn(move || {

http://is.gd/zmtsnG

[arielb1]

seems to be a duplicate of #25368