src/test/run-pass/issue-13494.rs

   1 // Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // This test may not always fail, but it can be flaky if the race it used to
  12 // expose is still present.
  13
  14 #![feature(mpsc_select)]
  15
  16 use std::sync::mpsc::{channel, Sender, Receiver};
  17 use std::thread;
  18
  19 fn helper(rx: Receiver<Sender<()>>) {
  20     for tx in rx.iter() {
  21         let _ = tx.send(());
  22     }
  23 }
  24
  25 fn main() {
  26     let (tx, rx) = channel();
  27     let t = thread::spawn(move|| { helper(rx) });
  28     let (snd, rcv) = channel::<isize>();
  29     for _ in 1..100000 {
  30         snd.send(1).unwrap();
  31         let (tx2, rx2) = channel();
  32         tx.send(tx2).unwrap();
  33         select! {
  34             _ = rx2.recv() => (),
  35             _ = rcv.recv() => ()
  36         }
  37     }
  38     drop(tx);
  39     t.join();
  40 }