|  | error[E0503]: cannot use `*y.pointer` because it was mutably borrowed | 
|  | --> $DIR/borrowck-assign-to-andmut-in-borrowed-loc.rs:18:9 | 
|  | | | 
|  | LL |         let z = copy_borrowed_ptr(&mut y); | 
|  | |                                   ------ borrow of `y` occurs here | 
|  | LL |         *y.pointer += 1; | 
|  | |         ^^^^^^^^^^^^^^^ use of borrowed `y` | 
|  | ... | 
|  | LL |         *z.pointer += 1; | 
|  | |         --------------- borrow later used here | 
|  |  | 
|  | error[E0506]: cannot assign to `*y.pointer` because it is borrowed | 
|  | --> $DIR/borrowck-assign-to-andmut-in-borrowed-loc.rs:18:9 | 
|  | | | 
|  | LL |         let z = copy_borrowed_ptr(&mut y); | 
|  | |                                   ------ borrow of `*y.pointer` occurs here | 
|  | LL |         *y.pointer += 1; | 
|  | |         ^^^^^^^^^^^^^^^ assignment to borrowed `*y.pointer` occurs here | 
|  | ... | 
|  | LL |         *z.pointer += 1; | 
|  | |         --------------- borrow later used here | 
|  |  | 
|  | error: aborting due to 2 previous errors | 
|  |  | 
|  | Some errors have detailed explanations: E0503, E0506. | 
|  | For more information about an error, try `rustc --explain E0503`. |