error: this expression borrows a reference (`&i32`) that is immediately dereferenced by the compiler
  --> $DIR/needless_borrow.rs:8:15
   |
LL |     let _ = x(&&a); // warn
   |               ^^^ help: change this to: `&a`
   |
   = note: `-D clippy::needless-borrow` implied by `-D warnings`

error: this expression borrows a reference (`&mut i32`) that is immediately dereferenced by the compiler
  --> $DIR/needless_borrow.rs:12:13
   |
LL |     mut_ref(&mut &mut b); // warn
   |             ^^^^^^^^^^^ help: change this to: `&mut b`

error: this expression borrows a reference (`&i32`) that is immediately dereferenced by the compiler
  --> $DIR/needless_borrow.rs:26:15
   |
LL |         46 => &&a,
   |               ^^^ help: change this to: `&a`

error: aborting due to 3 previous errors