error: this returns a `Result<_, ()>
  --> $DIR/result_unit_error.rs:4:1
   |
LL | pub fn returns_unit_error() -> Result<u32, ()> {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::result-unit-err` implied by `-D warnings`
   = help: use a custom Error type instead

error: this returns a `Result<_, ()>
  --> $DIR/result_unit_error.rs:13:5
   |
LL |     fn get_that_error(&self) -> Result<bool, ()>;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: use a custom Error type instead

error: this returns a `Result<_, ()>
  --> $DIR/result_unit_error.rs:15:5
   |
LL |     fn get_this_one_too(&self) -> Result<bool, ()> {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: use a custom Error type instead

error: this returns a `Result<_, ()>
  --> $DIR/result_unit_error.rs:33:5
   |
LL |     pub fn unit_error(&self) -> Result<usize, ()> {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: use a custom Error type instead

error: aborting due to 4 previous errors