rust/src/test/run-pass/issue-2735.rs

// 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 <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.

// pretty-expanded FIXME #23616

#![allow(unknown_features)]
#![feature(box_syntax)]

trait hax {
    fn dummy(&self) { }
}
impl<A> hax for A { }

fn perform_hax<T: 'static>(x: Box<T>) -> Box<hax+'static> {
    box x as Box<hax+'static>
}

fn deadcode() {
    perform_hax(box "deadcode".to_string());
}

pub fn main() {
    perform_hax(box 42);
}