File: unit-like-struct-drop-run.rs

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//@ run-pass
//@ needs-unwind
//@ needs-threads

// Make sure the destructor is run for unit-like structs.

use std::thread;

struct Foo;

impl Drop for Foo {
    fn drop(&mut self) {
        panic!("This panic should happen.");
    }
}

pub fn main() {
    let x = thread::spawn(move|| {
        let _b = Foo;
    }).join();

    let s = x.unwrap_err().downcast::<&'static str>().unwrap();
    assert_eq!(&**s, "This panic should happen.");
}