// 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. // xfail-pretty -- comments are infaithfully preserved fn main() { let mut x = None; match x { //~ NOTE loan of mutable local variable granted here None => { // It is ok to reassign x here, because there is in // fact no outstanding loan of x! x = Some(0); } Some(ref _i) => { x = Some(1); //~ ERROR assigning to mutable local variable prohibited due to outstanding loan } } copy x; // just to prevent liveness warnings }