// build-pass (FIXME(62277): could be check-pass?)
// compile-flags: -Z unpretty=hir

#![feature(existential_type)]
#[prelude_import]
use ::std::prelude::v1::*;
#[macro_use]
extern crate std;

trait Animal { }

fn main() {
              pub existential type ServeFut : Animal;
          }