ices/83613.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#83613

trait OpaqueTrait {}
impl<T> OpaqueTrait for T {}
type OpaqueType = impl OpaqueTrait;
fn mk_opaque() -> OpaqueType {
    || 0
}
trait AnotherTrait {}
impl<T: Send> AnotherTrait for T {}
impl AnotherTrait for OpaqueType {}

=== stdout ===
=== stderr ===
error[E0658]: `impl Trait` in type aliases is unstable
 --> /home/runner/work/glacier/glacier/ices/83613.rs:3:19
  |
3 | type OpaqueType = impl OpaqueTrait;
  |                   ^^^^^^^^^^^^^^^^
  |
  = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
  = help: add `#![feature(min_type_alias_impl_trait)]` to the crate attributes to enable

error[E0601]: `main` function not found in crate `83613`
 --> /home/runner/work/glacier/glacier/ices/83613.rs:1:1
  |
1 | / trait OpaqueTrait {}
2 | | impl<T> OpaqueTrait for T {}
3 | | type OpaqueType = impl OpaqueTrait;
4 | | fn mk_opaque() -> OpaqueType {
... |
8 | | impl<T: Send> AnotherTrait for T {}
9 | | impl AnotherTrait for OpaqueType {}
  | |___________________________________^ consider adding a `main` function to `/home/runner/work/glacier/glacier/ices/83613.rs`

error[E0119]: conflicting implementations of trait `AnotherTrait` for type `impl OpaqueTrait`
 --> /home/runner/work/glacier/glacier/ices/83613.rs:9:1
  |
8 | impl<T: Send> AnotherTrait for T {}
  | -------------------------------- first implementation here
9 | impl AnotherTrait for OpaqueType {}
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `impl OpaqueTrait`

error: cannot implement trait on type alias impl trait
 --> /home/runner/work/glacier/glacier/ices/83613.rs:9:1
  |
9 | impl AnotherTrait for OpaqueType {}
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
note: type alias impl trait defined here
 --> /home/runner/work/glacier/glacier/ices/83613.rs:3:19
  |
3 | type OpaqueType = impl OpaqueTrait;
  |                   ^^^^^^^^^^^^^^^^

error: aborting due to 4 previous errors

Some errors have detailed explanations: E0119, E0601, E0658.
For more information about an error, try `rustc --explain E0119`.
==============