// Copyright 2014 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(macro_rules)] // error-pattern: unknown macro variable `nonexistent` macro_rules! g { ($inp:ident) => ( { $inp $nonexistent } ); } fn main() { g!(foo); }