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// Make sure that we check that impl trait types implement the traits that they
// claim to.
#![feature(type_alias_impl_trait)]
type X<T> = impl Clone;
fn f<T: Clone>(t: T) -> X<T> {
t
//~^ ERROR the trait bound `T: Clone` is not satisfied
}
fn g<T>(o: Option<X<T>>) -> Option<X<T>> {
o.clone()
}
fn main() {
g(None::<X<&mut ()>>);
}
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