//@ run-pass //@ needs-unwind //@ ignore-emscripten no threads support // 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."); }