// Copyright 2016 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.

mod private {
    pub trait Future {
        fn wait(&self) where Self: Sized;
    }

    impl Future for Box<Future> {
        fn wait(&self) { }
    }
}

//use private::Future;

fn bar(arg: Box<private::Future>) {
    arg.wait();
    //~^ ERROR no method named `wait` found for type `std::boxed::Box<private::Future + 'static>`
    //~| the following trait is implemented but not in scope
    //~| ERROR the trait bound `private::Future + 'static: std::marker::Sized` is not satisfied
    //~| `private::Future + 'static` does not have a constant size known at compile-time
}

fn main() {

}