// Copyright 2017 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. #![feature(rustc_attrs)] use std::ops::Deref; #[rustc_error] fn main() { //~ ERROR compilation successful let _x: fn(&i32) -> <&i32 as Deref>::Target = unimplemented!(); }