error: `core::iter::empty()` is the more idiomatic way
  --> tests/ui/default_instead_of_iter_empty_no_std.rs:23:13
   |
LL |     let _ = core::iter::Empty::<usize>::default();
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `core::iter::empty::<usize>()`
   |
   = note: `-D clippy::default-instead-of-iter-empty` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::default_instead_of_iter_empty)]`

error: `core::iter::empty()` is the more idiomatic way
  --> tests/ui/default_instead_of_iter_empty_no_std.rs:24:42
   |
LL |     let _foo: core::iter::Empty<usize> = core::iter::Empty::default();
   |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `core::iter::empty()`

error: aborting due to 2 previous errors