error[E0277]: `()` is not an iterator
  --> $DIR/issue-28098.rs:2:13
   |
LL |     let _ = Iterator::next(&mut ());
   |             ^^^^^^^^^^^^^^ `()` is not an iterator
   |
   = help: the trait `std::iter::Iterator` is not implemented for `()`
   = note: required by `std::iter::Iterator::next`

error[E0277]: `bool` is not an iterator
  --> $DIR/issue-28098.rs:5:14
   |
LL |     for _ in false {}
   |              ^^^^^ `bool` is not an iterator
   |
   = help: the trait `std::iter::Iterator` is not implemented for `bool`
   = note: required by `std::iter::IntoIterator::into_iter`

error[E0277]: `()` is not an iterator
  --> $DIR/issue-28098.rs:8:13
   |
LL |     let _ = Iterator::next(&mut ());
   |             ^^^^^^^^^^^^^^ `()` is not an iterator
   |
   = help: the trait `std::iter::Iterator` is not implemented for `()`
   = note: required by `std::iter::Iterator::next`

error[E0277]: `()` is not an iterator
  --> $DIR/issue-28098.rs:17:13
   |
LL |     let _ = Iterator::next(&mut ());
   |             ^^^^^^^^^^^^^^ `()` is not an iterator
   |
   = help: the trait `std::iter::Iterator` is not implemented for `()`
   = note: required by `std::iter::Iterator::next`

error[E0277]: `()` is not an iterator
  --> $DIR/issue-28098.rs:20:13
   |
LL |     let _ = Iterator::next(&mut ());
   |             ^^^^^^^^^^^^^^ `()` is not an iterator
   |
   = help: the trait `std::iter::Iterator` is not implemented for `()`
   = note: required by `std::iter::Iterator::next`

error[E0277]: `bool` is not an iterator
  --> $DIR/issue-28098.rs:23:14
   |
LL |     for _ in false {}
   |              ^^^^^ `bool` is not an iterator
   |
   = help: the trait `std::iter::Iterator` is not implemented for `bool`
   = note: required by `std::iter::IntoIterator::into_iter`

error: aborting due to 6 previous errors

For more information about this error, try `rustc --explain E0277`.