// Copyright 2015 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. #[derive(Copy, Clone)] struct S; impl S { fn mutate(&mut self) { } } fn func(arg: S) { //~^ here to make mutable arg.mutate(); //~^ ERROR cannot borrow immutable argument //~| cannot borrow mutably } fn main() { let local = S; //~^ here to make mutable local.mutate(); //~^ ERROR cannot borrow immutable local variable //~| cannot borrow mutably }