error: exported type named `Error` that implements `Error`
  --> tests/ui/error_impl_error.rs:7:16
   |
LL |     pub struct Error;
   |                ^^^^^
   |
note: `Error` was implemented here
  --> tests/ui/error_impl_error.rs:16:5
   |
LL |     impl std::error::Error for Error {}
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   = note: `-D clippy::error-impl-error` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::error_impl_error)]`

error: exported type named `Error` that implements `Error`
  --> tests/ui/error_impl_error.rs:21:21
   |
LL |     pub(super) enum Error {}
   |                     ^^^^^
   |
note: `Error` was implemented here
  --> tests/ui/error_impl_error.rs:30:5
   |
LL |     impl std::error::Error for Error {}
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: exported type named `Error` that implements `Error`
  --> tests/ui/error_impl_error.rs:34:15
   |
LL |     pub union Error {
   |               ^^^^^
   |
note: `Error` was implemented here
  --> tests/ui/error_impl_error.rs:52:5
   |
LL |     impl std::error::Error for Error {}
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: exported type alias named `Error` that implements `Error`
  --> tests/ui/error_impl_error.rs:56:14
   |
LL |     pub type Error = std::fmt::Error;
   |              ^^^^^

error: aborting due to 4 previous errors