ices/68621.sh: fixed with errors

[github-actions]

Issue: rust-lang/rust#68621

#!/bin/bash

rustc -Zsave-analysis - << END
#[feature(type_alias_impl_trait)]

trait Trait {}

trait Service {
    type Future: Trait;
}

struct Struct;

impl Service for Struct {
    type Future = impl Trait;
}

fn main() {}

END

=== stdout ===
=== stderr ===
error[E0658]: `impl Trait` in type aliases is unstable
  --> <anon>:12:19
   |
12 |     type Future = impl Trait;
   |                   ^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/63063
   = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable

error: could not find defining uses
  --> <anon>:12:5
   |
12 |     type Future = impl Trait;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0658`.
==============