rust/src/test/run-pass/fail-in-dtor-drops-fields.rs

// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

use std::task;

static mut dropped: bool = false;

struct A {
    b: B,
}

struct B {
    foo: int,
}

impl Drop for A {
    fn drop(&mut self) {
        fail!()
    }
}

impl Drop for B {
    fn drop(&mut self) {
        unsafe { dropped = true; }
    }
}

pub fn main() {
    let ret = task::try(proc() {
        let _a = A { b: B { foo: 3 } };
    });
    assert!(ret.is_err());
    unsafe { assert!(dropped); }
}