ices/68621.sh: fixed with errors (#279)

=== stdout ===
=== stderr ===
error[E0658]: `impl Trait` in type aliases is unstable
  --> <anon>:12:19
   |
12 |     type Future = impl Trait;
   |                   ^^^^^^^^^^
   |
   = note: for more information, see rust-lang/rust#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`.
==============

Co-authored-by: rustbot <47979223+rustbot@users.noreply.github.com>