//@ known-bug: rust-lang/rust#125810
#![feature(arbitrary_self_types, dispatch_from_dyn)]
use std::ops::{Deref, DispatchFromDyn};
trait Trait<T: Deref<Target = Self> + DispatchFromDyn<T>> {
fn MONO_BUF(self: T) -> dyn Trait<T>;
}
fn main() {}