src/test/ui/panics/panic-handler-chain.rs

   1 // run-pass
   2 #![allow(stable_features)]
   3
   4 // ignore-emscripten no threads support
   5
   6 #![feature(std_panic)]
   7
   8 use std::sync::atomic::{AtomicUsize, Ordering};
   9 use std::panic;
  10 use std::thread;
  11
  12 static A: AtomicUsize = AtomicUsize::new(0);
  13 static B: AtomicUsize = AtomicUsize::new(0);
  14
  15 fn main() {
  16     panic::set_hook(Box::new(|_| { A.fetch_add(1, Ordering::SeqCst); }));
  17     let hook = panic::take_hook();
  18     panic::set_hook(Box::new(move |info| {
  19         B.fetch_add(1, Ordering::SeqCst);
  20         hook(info);
  21     }));
  22
  23     let _ = thread::spawn(|| {
  24         panic!();
  25     }).join();
  26
  27     assert_eq!(1, A.load(Ordering::SeqCst));
  28     assert_eq!(1, B.load(Ordering::SeqCst));
  29 }