rust/tests/ui/panics/panic-handler-chain.rs

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//@ run-pass
//@ needs-unwind
//@ needs-threads
#![allow(stable_features)]
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#![feature(std_panic)]
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use std::sync::atomic::{AtomicUsize, Ordering};
use std::panic;
use std::thread;
static A: AtomicUsize = AtomicUsize::new(0);
static B: AtomicUsize = AtomicUsize::new(0);
fn main() {
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panic::set_hook(Box::new(|_| { A.fetch_add(1, Ordering::SeqCst); }));
let hook = panic::take_hook();
panic::set_hook(Box::new(move |info| {
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B.fetch_add(1, Ordering::SeqCst);
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hook(info);
}));
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let _ = thread::spawn(|| {
panic!();
}).join();
assert_eq!(1, A.load(Ordering::SeqCst));
assert_eq!(1, B.load(Ordering::SeqCst));
}