// 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 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. fn main() { let f = |x| x * 3; let a = f(); //~ ERROR E0057 let b = f(4); let c = f(2, 3); //~ ERROR E0057 }