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// 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;
}
}
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