| error[E0499]: cannot borrow `i` as mutable more than once at a time | |
| --> $DIR/E0499.rs:4:17 | |
| | | |
| LL | let mut x = &mut i; | |
| | ------ first mutable borrow occurs here | |
| LL | let mut a = &mut i; | |
| | ^^^^^^ second mutable borrow occurs here | |
| LL | a.use_mut(); | |
| LL | x.use_mut(); | |
| | - first borrow later used here | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0499`. |