// Copyright 2012 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 mut _a = 3; let _b = &mut _a; { let _c = &*_b; _a = 4; //~ ERROR cannot assign to `_a` } }