// 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(use_extern_macros)] pub use std::panic; //~ NOTE previous macro export here #[macro_export] macro_rules! panic { () => {} } //~ ERROR a macro named `panic` has already been exported //~| NOTE `panic` already exported fn main() {}