| // 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. | 
 |  | 
 | // aux-build:issue-39889.rs | 
 | // ignore-stage1 | 
 |  | 
 | #![feature(proc_macro)] | 
 | #![allow(unused)] | 
 |  | 
 | extern crate issue_39889; | 
 | use issue_39889::Issue39889; | 
 |  | 
 | #[derive(Issue39889)] | 
 | struct S; | 
 |  | 
 | fn main() {} |