error: `peek` never called on `Peekable` iterator
  --> $DIR/unused_peekable.rs:13:9
   |
LL |     let peekable = std::iter::empty::<u32>().peekable();
   |         ^^^^^^^^
   |
   = help: consider removing the call to `peekable`
   = note: `-D clippy::unused-peekable` implied by `-D warnings`

error: `peek` never called on `Peekable` iterator
  --> $DIR/unused_peekable.rs:17:9
   |
LL |     let new_local = old_local;
   |         ^^^^^^^^^
   |
   = help: consider removing the call to `peekable`

error: `peek` never called on `Peekable` iterator
  --> $DIR/unused_peekable.rs:21:9
   |
LL |     let by_mut_ref = &mut by_mut_ref_test;
   |         ^^^^^^^^^^
   |
   = help: consider removing the call to `peekable`

error: `peek` never called on `Peekable` iterator
  --> $DIR/unused_peekable.rs:28:9
   |
LL |     let peekable_from_fn = returns_peekable();
   |         ^^^^^^^^^^^^^^^^
   |
   = help: consider removing the call to `peekable`

error: `peek` never called on `Peekable` iterator
  --> $DIR/unused_peekable.rs:31:13
   |
LL |     let mut peekable_using_iterator_method = std::iter::empty::<u32>().peekable();
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: consider removing the call to `peekable`

error: `peek` never called on `Peekable` iterator
  --> $DIR/unused_peekable.rs:36:9
   |
LL |     let passed_along_ref = std::iter::empty::<u32>().peekable();
   |         ^^^^^^^^^^^^^^^^
   |
   = help: consider removing the call to `peekable`

error: `peek` never called on `Peekable` iterator
  --> $DIR/unused_peekable.rs:41:9
   |
LL |     let _by_ref = by_ref_test.by_ref();
   |         ^^^^^^^
   |
   = help: consider removing the call to `peekable`

error: `peek` never called on `Peekable` iterator
  --> $DIR/unused_peekable.rs:43:13
   |
LL |     let mut peekable_in_for_loop = std::iter::empty::<u32>().peekable();
   |             ^^^^^^^^^^^^^^^^^^^^
   |
   = help: consider removing the call to `peekable`

error: aborting due to 8 previous errors