File: main.rs

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extern crate lib;

use std::thread;

static mut statik: isize = 0;

struct A;
impl Drop for A {
    fn drop(&mut self) {
        unsafe { statik = 1; }
    }
}

fn main() {
    thread::spawn(move|| {
        let _a = A;
        lib::callback(|| panic!());
    }).join().unwrap_err();

    unsafe {
        assert_eq!(lib::statik, 1);
        assert_eq!(statik, 1);
    }
}