error: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
  --> $DIR/toplevel_ref_arg.rs:20:9
   |
LL |     let ref _x = 1;
   |     ----^^^^^^----- help: try: `let _x = &1;`
   |
   = 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:22:9
   |
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:24:9
   |
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:26:9
   |
LL |     let ref mut _z = 1 + 2;
   |     ----^^^^^^^^^^--------- help: try: `let _z = &mut (1 + 2);`

error: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
  --> $DIR/toplevel_ref_arg.rs:31:9
   |
LL |     let ref _x = vec![1, 2, 3];
   |     ----^^^^^^----------------- help: try: `let _x = &vec![1, 2, 3];`

error: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
  --> $DIR/toplevel_ref_arg.rs:11:13
   |
LL |         let ref _y = 42;
   |         ----^^^^^^------ help: try: `let _y = &42;`
...
LL |         gen_binding!();
   |         --------------- in this macro invocation
   |
   = note: this error originates in the macro `gen_binding` (in Nightly builds, run with -Z macro-backtrace for more info)

error: aborting due to 6 previous errors