error: this expression borrows a reference that is immediately dereferenced by the compiler
  --> $DIR/needless_borrow.rs:25:15
   |
25 |     let c = x(&&a);
   |               ^^^ help: change this to: `&a`
   |
   = note: `-D clippy::needless-borrow` implied by `-D warnings`

error: this pattern creates a reference to a reference
  --> $DIR/needless_borrow.rs:32:17
   |
32 |     if let Some(ref cake) = Some(&5) {}
   |                 ^^^^^^^^ help: change this to: `cake`

error: this expression borrows a reference that is immediately dereferenced by the compiler
  --> $DIR/needless_borrow.rs:39:15
   |
39 |         46 => &&a,
   |               ^^^ help: change this to: `&a`

error: this pattern takes a reference on something that is being de-referenced
  --> $DIR/needless_borrow.rs:61:34
   |
61 |     let _ = v.iter_mut().filter(|&ref a| a.is_empty());
   |                                  ^^^^^^ help: try removing the `&ref` part and just keep: `a`
   |
   = note: `-D clippy::needless-borrowed-reference` implied by `-D warnings`

error: this pattern takes a reference on something that is being de-referenced
  --> $DIR/needless_borrow.rs:62:30
   |
62 |     let _ = v.iter().filter(|&ref a| a.is_empty());
   |                              ^^^^^^ help: try removing the `&ref` part and just keep: `a`

error: this pattern creates a reference to a reference
  --> $DIR/needless_borrow.rs:62:31
   |
62 |     let _ = v.iter().filter(|&ref a| a.is_empty());
   |                               ^^^^^ help: change this to: `a`

error: aborting due to 6 previous errors