| error[E0499]: cannot borrow `y.0` as mutable more than once at a time | |
| --> $DIR/borrowck-anon-fields-struct.rs:29:11 | |
| | | |
| LL | Y(ref mut a, _) => a | |
| | --------- first mutable borrow occurs here | |
| ... | |
| LL | Y(ref mut b, _) => b | |
| | ^^^^^^^^^ second mutable borrow occurs here | |
| ... | |
| LL | } | |
| | - first borrow ends here | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0499`. |