error: usage of ref pattern --> $DIR/ref_patterns.rs:8:14 | LL | Some(ref opt) => {}, | ^^^^^^^ | = help: consider using `&` for clarity instead = note: `-D clippy::ref-patterns` implied by `-D warnings` error: usage of ref pattern --> $DIR/ref_patterns.rs:15:9 | LL | let ref y = x; | ^^^^^ | = help: consider using `&` for clarity instead error: usage of ref pattern --> $DIR/ref_patterns.rs:19:21 | LL | fn use_in_parameter(ref x: i32) {} | ^^^^^ | = help: consider using `&` for clarity instead error: aborting due to 3 previous errors