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

   1 // run-pass
   2 // ignore-emscripten no threads support
   3
   4 use std::sync::atomic::{AtomicUsize, Ordering, ATOMIC_USIZE_INIT};
   5 use std::panic;
   6 use std::thread;
   7
   8 static A: AtomicUsize = ATOMIC_USIZE_INIT;
   9
  10 fn main() {
  11     panic::set_hook(Box::new(|_| {
  12         A.fetch_add(1, Ordering::SeqCst);
  13     }));
  14
  15     let result = thread::spawn(|| {
  16         let result = panic::catch_unwind(|| {
  17             panic!("hi there");
  18         });
  19
  20         panic::resume_unwind(result.unwrap_err());
  21     }).join();
  22
  23     let msg = *result.unwrap_err().downcast::<&'static str>().unwrap();
  24     assert_eq!("hi there", msg);
  25     assert_eq!(1, A.load(Ordering::SeqCst));
  26 }