1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
// 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=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 use `*y.pointer` because it was mutably borrowed [E0503]
//~| ERROR cannot assign to `*y.pointer` because it is borrowed [E0506]
*z.pointer += 1;
}
}
|
