ices/66706-2.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#66706

fn bug() {
    [0; match [|f @ &ref _| () ] {} ]
}

fn main() {}

=== stdout ===
=== stderr ===
error: expected identifier, found reserved identifier `_`
 --> /home/runner/work/glacier/glacier/ices/66706-2.rs:2:26
  |
2 |     [0; match [|f @ &ref _| () ] {} ]
  |                          ^ expected identifier, found reserved identifier

error[E0658]: `match` is not allowed in a `const`
 --> /home/runner/work/glacier/glacier/ices/66706-2.rs:2:9
  |
2 |     [0; match [|f @ &ref _| () ] {} ]
  |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: see issue #49146 <https://github.com/rust-lang/rust/issues/49146> for more information
  = help: add `#![feature(const_if_match)]` to the crate attributes to enable

error[E0308]: mismatched types
 --> /home/runner/work/glacier/glacier/ices/66706-2.rs:2:5
  |
1 | fn bug() {
  |          - help: try adding a return type: `-> [{integer}; _]`
2 |     [0; match [|f @ &ref _| () ] {} ]
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `()`, found array `[{integer}; _]`

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0308, E0658.
For more information about an error, try `rustc --explain E0308`.
==============

[JohnTitor]

It's fixed.