File: bounds-are-checked-2.rs

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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)]

mod foo {
    pub type X<T> = impl Clone;

    fn f<T: Clone>(t: T) -> X<T> {
        t
        //~^ ERROR the trait bound `T: Clone` is not satisfied
    }
}
use foo::X;

fn g<T>(o: Option<X<T>>) -> Option<X<T>> {
    o.clone()
}

fn main() {
    g(None::<X<&mut ()>>);
}