// Copyright 2018 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. // aux-build:edition-extern-crate-allowed.rs // edition:2015 // compile-pass #![warn(rust_2018_idioms)] extern crate edition_extern_crate_allowed; //~^ WARNING unused extern crate fn main() {}