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#![feature(type_alias_impl_trait)]
fn main() {}
type MyIter<T> = impl Iterator<Item = T>;
fn my_iter<T>(t: T) -> MyIter<T> {
std::iter::once(t)
}
fn my_iter2<T>(t: T) -> MyIter<T> {
Some(t).into_iter()
//~^ ERROR concrete type differs from previous
}
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