| // 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 <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. |
| |
| // Test that assignments to an `&mut` pointer which is found in a |
| // borrowed (but otherwise non-aliasable) location is illegal. |
| |
| // compile-flags: -Z borrowck=compare -C overflow-checks=off |
| |
| struct S<'a> { |
| pointer: &'a mut isize |
| } |
| |
| fn copy_borrowed_ptr<'a>(p: &'a mut S<'a>) -> S<'a> { |
| S { pointer: &mut *p.pointer } |
| } |
| |
| fn main() { |
| let mut x = 1; |
| |
| { |
| let mut y = S { pointer: &mut x }; |
| let z = copy_borrowed_ptr(&mut y); |
| *y.pointer += 1; |
| //~^ ERROR cannot assign to `*y.pointer` because it is borrowed (Ast) [E0506] |
| //~| ERROR cannot use `*y.pointer` because it was mutably borrowed (Mir) [E0503] |
| //~| ERROR cannot assign to `*y.pointer` because it is borrowed (Mir) [E0506] |
| *z.pointer += 1; |
| } |
| } |
