ices/67945-3.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#67945

// Note: Centril asked in the issue to
// include all variants in a regression test.

// even more reduced version by Centril
#![feature(type_ascription)]

enum Bug<S> {
    Var = 0: S,
}

=== stdout ===
=== stderr ===
error[E0601]: `main` function not found in crate `67945_3`
 --> /home/runner/work/glacier/glacier/ices/67945-3.rs:5:1
  |
5 | / #![feature(type_ascription)]
6 | |
7 | | enum Bug<S> {
8 | |     Var = 0: S,
9 | | }
  | |_^ consider adding a `main` function to `/home/runner/work/glacier/glacier/ices/67945-3.rs`

error[E0308]: mismatched types
 --> /home/runner/work/glacier/glacier/ices/67945-3.rs:8:11
  |
7 | enum Bug<S> {
  |          - this type parameter
8 |     Var = 0: S,
  |           ^ expected type parameter `S`, found integer
  |
  = note: expected type parameter `S`
                       found type `{integer}`
  = help: type parameters must be constrained to match other types
  = note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters

error[E0308]: mismatched types
 --> /home/runner/work/glacier/glacier/ices/67945-3.rs:8:11
  |
7 | enum Bug<S> {
  |          - this type parameter
8 |     Var = 0: S,
  |           ^^^^ expected `isize`, found type parameter `S`
  |
  = note:        expected type `isize`
          found type parameter `S`
  = help: type parameters must be constrained to match other types
  = note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0308, E0601.
For more information about an error, try `rustc --explain E0308`.
==============

[JohnTitor]

This one as well.