| // Test that assignments to an `&mut` pointer which is found in a |
| // borrowed (but otherwise non-aliasable) location is illegal. |
| |
| // compile-flags: -C overflow-checks=on |
| |
| 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 use `*y.pointer` because it was mutably borrowed [E0503] |
| //~| ERROR cannot assign to `*y.pointer` because it is borrowed [E0506] |
| *z.pointer += 1; |
| } |
| } |
