error[E0499]: cannot borrow `y.0` as mutable more than once at a time | |
--> $DIR/borrowck-anon-fields-tuple.rs:37:10 | |
| | |
LL | (ref mut a, _) => a | |
| --------- first mutable borrow occurs here | |
... | |
LL | (ref mut b, _) => b //~ ERROR cannot borrow | |
| ^^^^^^^^^ 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`. |