error: the `y @ _` pattern can be written as just `y`
  --> tests/ui/patterns.rs:13:9
   |
LL |         y @ _ => (),
   |         ^^^^^ help: try: `y`
   |
   = note: `-D clippy::redundant-pattern` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::redundant_pattern)]`

error: the `x @ _` pattern can be written as just `x`
  --> tests/ui/patterns.rs:29:9
   |
LL |         ref mut x @ _ => {
   |         ^^^^^^^^^^^^^ help: try: `ref mut x`

error: the `x @ _` pattern can be written as just `x`
  --> tests/ui/patterns.rs:38:9
   |
LL |         ref x @ _ => println!("vec: {:?}", x),
   |         ^^^^^^^^^ help: try: `ref x`

error: aborting due to 3 previous errors