rust/src/test/run-pass/issue-2734.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.

trait hax { } 
impl <A> A: hax { } 

fn perform_hax<T: Durable>(x: @T) -> hax {
    x as hax 
}

fn deadcode() {
    perform_hax(@~"deadcode");
}

fn main() {
    let _ = perform_hax(@42);
}