ices/74298.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#74298

#![feature(type_alias_impl_trait)]

type X<T> = impl Sized;

fn f<T>() -> X<T> {}

trait Y {
    fn g(&self) {}
}

impl Y for X<()> {}
impl Y for X<i32> {}

fn main() {
    f::<()>().g();
}

=== stdout ===
=== stderr ===
error: cannot implement trait on type alias impl trait
  --> /home/runner/work/glacier/glacier/ices/74298.rs:11:1
   |
11 | impl Y for X<()> {}
   | ^^^^^^^^^^^^^^^^
   |
note: type alias impl trait defined here
  --> /home/runner/work/glacier/glacier/ices/74298.rs:3:13
   |
3  | type X<T> = impl Sized;
   |             ^^^^^^^^^^

error: cannot implement trait on type alias impl trait
  --> /home/runner/work/glacier/glacier/ices/74298.rs:12:1
   |
12 | impl Y for X<i32> {}
   | ^^^^^^^^^^^^^^^^^
   |
note: type alias impl trait defined here
  --> /home/runner/work/glacier/glacier/ices/74298.rs:3:13
   |
3  | type X<T> = impl Sized;
   |             ^^^^^^^^^^

error: aborting due to 2 previous errors

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