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#![feature(return_position_impl_trait_in_trait)]
#![allow(incomplete_features)]
use std::fmt::Display;
use std::ops::Deref;
trait Foo {
fn bar(self) -> impl Deref<Target = impl Display + ?Sized>;
}
fn foo<T: Foo>(t: T) {
let () = t.bar();
//~^ ERROR mismatched types
}
fn main() {}
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