src/test/run-pass/panic-recover-propagate.rs

   1 // Copyright 2015 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 #![feature(std_panic, recover, panic_propagate, panic_handler, const_fn)]
  12
  13 use std::sync::atomic::{AtomicUsize, Ordering};
  14 use std::panic;
  15 use std::thread;
  16
  17 static A: AtomicUsize = AtomicUsize::new(0);
  18
  19 fn main() {
  20     panic::set_handler(|_| {
  21         A.fetch_add(1, Ordering::SeqCst);
  22     });
  23
  24     let result = thread::spawn(|| {
  25         let result = panic::recover(|| {
  26             panic!("hi there");
  27         });
  28
  29         panic::propagate(result.err().unwrap());
  30     }).join();
  31
  32     let msg = *result.err().unwrap().downcast::<&'static str>().unwrap();
  33     assert_eq!("hi there", msg);
  34     assert_eq!(1, A.load(Ordering::SeqCst));
  35 }