ices/79566.sh: fixed with errors

[github-actions]

Issue: rust-lang/rust#79566

#!/bin/bash

rustc -Zinstrument-coverage - << EOF
#![feature(type_alias_impl_trait)]

type Closure = impl FnOnce();

fn c() -> Closure {
    || -> Closure { || () }
}

fn main() {}
EOF

=== stdout ===
=== stderr ===
error[E0271]: type mismatch resolving `<[closure@<anon>:6:5: 6:28] as FnOnce<()>>::Output == ()`
 --> <anon>:3:16
  |
3 | type Closure = impl FnOnce();
  |                ^^^^^^^^^^^^^ expected opaque type, found `()`
  |
  = note: expected opaque type `impl FnOnce<()>`
               found unit type `()`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0271`.
==============