| error[E0303]: pattern bindings are not allowed after an `@` | |
| --> $DIR/pattern-bindings-after-at.rs:8:31 | |
| | | |
| LL | ref mut z @ &mut Some(ref a) => { | |
| | ^^^^^ not allowed after `@` | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0303`. |