// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

#![feature(rustc_attrs)]

use std::borrow::Borrow;

#[rustc_dump_program_clauses] //~ ERROR program clause dump
trait Foo<'a, 'b, T, U>
where
    T: Borrow<U> + ?Sized,
    U: ?Sized + 'b,
    'a: 'b,
    Box<T>:, // NOTE(#53696) this checks an empty list of bounds.
{
}

fn main() {
    println!("hello");
}