// Copyright 2012 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 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. struct r { i: @mut int, } #[unsafe_destructor] impl Drop for r { fn drop(&mut self) { unsafe { *(self.i) = *(self.i) + 1; } } } fn r(i: @mut int) -> r { r { i: i } } struct A { y: r, } fn main() { let i = @mut 0; { // Can't do this copy let x = ~~~A {y: r(i)}; let _z = x.clone(); //~ ERROR failed to find an implementation info2!("{:?}", x); } error2!("{:?}", *i); }