rust/tests/ui/panics/panic-recover-propagate.rs

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// run-pass
// needs-unwind
// ignore-emscripten no threads support
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use std::sync::atomic::{AtomicUsize, Ordering};
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use std::panic;
use std::thread;
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static A: AtomicUsize = AtomicUsize::new(0);
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fn main() {
panic::set_hook(Box::new(|_| {
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A.fetch_add(1, Ordering::SeqCst);
}));
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let result = thread::spawn(|| {
let result = panic::catch_unwind(|| {
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panic!("hi there");
});
panic::resume_unwind(result.unwrap_err());
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}).join();
let msg = *result.unwrap_err().downcast::<&'static str>().unwrap();
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assert_eq!("hi there", msg);
assert_eq!(1, A.load(Ordering::SeqCst));
}