error: You appear to be counting bytes the naive way
  --> $DIR/bytecount.rs:5:13
   |
LL |     let _ = x.iter().filter(|&&a| a == 0).count(); // naive byte count
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider using the bytecount crate: `bytecount::count(x, 0)`
   |
note: lint level defined here
  --> $DIR/bytecount.rs:1:8
   |
LL | #[deny(clippy::naive_bytecount)]
   |        ^^^^^^^^^^^^^^^^^^^^^^^

error: You appear to be counting bytes the naive way
  --> $DIR/bytecount.rs:7:13
   |
LL |     let _ = (&x[..]).iter().filter(|&a| *a == 0).count(); // naive byte count
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider using the bytecount crate: `bytecount::count((&x[..]), 0)`

error: You appear to be counting bytes the naive way
  --> $DIR/bytecount.rs:19:13
   |
LL |     let _ = x.iter().filter(|a| b + 1 == **a).count(); // naive byte count
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider using the bytecount crate: `bytecount::count(x, b + 1)`

error: aborting due to 3 previous errors