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error[E0277]: the trait bound `(): std::iter::Iterator` is not satisfied
--> $DIR/conservative_impl_trait.rs:13:33
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LL | fn will_ice(something: &u32) -> impl Iterator<Item = &u32> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ `()` is not an iterator; maybe try calling `.iter()` or a similar method
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= help: the trait `std::iter::Iterator` is not implemented for `()`
= note: the return type of a function must have a statically known size
error: aborting due to previous error
For more information about this error, try `rustc --explain E0277`.
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