error: `ref` directly on a function argument is ignored. Consider using a reference type instead.
  --> $DIR/toplevel_ref_arg.rs:4:15
   |
LL | fn the_answer(ref mut x: u8) {
   |               ^^^^^^^^^
   |
   = note: `-D clippy::toplevel-ref-arg` implied by `-D warnings`

error: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
  --> $DIR/toplevel_ref_arg.rs:15:9
   |
LL |     let ref x = 1;
   |     ----^^^^^----- help: try: `let x = &1;`

error: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
  --> $DIR/toplevel_ref_arg.rs:17:9
   |
LL |     let ref y: (&_, u8) = (&1, 2);
   |     ----^^^^^--------------------- help: try: `let y: &(&_, u8) = &(&1, 2);`

error: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
  --> $DIR/toplevel_ref_arg.rs:19:9
   |
LL |     let ref z = 1 + 2;
   |     ----^^^^^--------- help: try: `let z = &(1 + 2);`

error: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
  --> $DIR/toplevel_ref_arg.rs:21:9
   |
LL |     let ref mut z = 1 + 2;
   |     ----^^^^^^^^^--------- help: try: `let z = &mut (1 + 2);`

error: aborting due to 5 previous errors