| // Copyright 2018 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 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // Issue 27282: Example 1: This sidesteps the AST checks disallowing |
| // mutable borrows in match guards by hiding the mutable borrow in a |
| // guard behind a move (of the ref mut pattern id) within a closure. |
| // |
| // This example is not rejected by AST borrowck (and then reliably |
| // segfaults when executed). |
| |
| #![feature(nll)] |
| |
| fn main() { |
| match Some(&4) { |
| None => {}, |
| ref mut foo |
| if { (|| { let bar = foo; bar.take() })(); false } => {}, |
| //~^ ERROR cannot move out of borrowed content [E0507] |
| Some(s) => std::process::exit(*s), |
| } |
| } |
