fn example1(x: &mut i32, y: &mut i32 ) -> i32 {
    *x = 42;
    *y = 13;
    return *x ; // Has to read 42 , because `x  and `y` cannot alias !
}

fn main () {
      let mut local = 5;
      let raw_pointer = &mut local as *mut i32 ;
      let result = unsafe { example1 (&mut *raw_pointer, &mut *raw_pointer ) };
      println !("{}", result); // Prints "13".
}