1 error[E0277]: `()` is not an iterator
2 --> $DIR/conservative_impl_trait.rs:3:33
4 LL | fn will_ice(something: &u32) -> impl Iterator<Item = &u32> {
5 | ^^^^^^^^^^^^^^^^^^^^^^^^^^ `()` is not an iterator
7 = help: the trait `std::iter::Iterator` is not implemented for `()`
8 = note: the return type of a function must have a statically known size
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0277`.