ices/74280.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#74280

#![feature(min_type_alias_impl_trait)]
#![feature(type_alias_impl_trait)]

type Test = impl Copy;

fn test() -> Test {
    let y = || -> Test { () };
    7
}

fn main() {}

=== stdout ===
=== stderr ===
warning: the feature `type_alias_impl_trait` is incomplete and may not be safe to use and/or cause compiler crashes
 --> /home/runner/work/glacier/glacier/ices/74280.rs:2:12
  |
2 | #![feature(type_alias_impl_trait)]
  |            ^^^^^^^^^^^^^^^^^^^^^
  |
  = note: `#[warn(incomplete_features)]` on by default
  = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information

error: concrete type differs from previous defining opaque type use
 --> /home/runner/work/glacier/glacier/ices/74280.rs:7:13
  |
7 |     let y = || -> Test { () };
  |             ^^^^^^^^^^^^^^^^^ expected `i32`, got `()`
  |
note: previous use here
 --> /home/runner/work/glacier/glacier/ices/74280.rs:6:1
  |
6 | fn test() -> Test {
  | ^^^^^^^^^^^^^^^^^

error: aborting due to previous error; 1 warning emitted

==============