error: the `y @ _` pattern can be written as just `y`
  --> patterns.rs:10:9
   |
10 |         y @ _   => (),
   |         ^^^^^
   |
   = note: `-D redundant-pattern` implied by `-D warnings`

error: aborting due to previous error

error: Could not compile `clippy_tests`.

To learn more, run the command again with --verbose.