ices/112822.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#112822

#![feature(const_trait_impl)]

const fn test() -> impl ~const Fn() {
    const move || {
        let sl: &[u8] = b"foo";

        match sl {
            [first, _remainder @ ..] => {
                assert_eq!(first, &b'f');
            }
            [] => panic!(),
        }
    }
}

fn main() {}

=== stdout ===
=== stderr ===
error[E0658]: const closures are experimental
 --> /home/runner/work/glacier/glacier/ices/112822.rs:4:5
  |
4 |     const move || {
  |     ^^^^^
  |
  = note: see issue #106003 <https://github.com/rust-lang/rust/issues/106003> for more information
  = help: add `#![feature(const_closures)]` to the crate attributes to enable

error[E0015]: cannot call non-const operator in constant functions
 --> /home/runner/work/glacier/glacier/ices/112822.rs:9:17
  |
9 |                 assert_eq!(first, &b'f');
  |                 ^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
  = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0015]: cannot call non-const fn `core::panicking::assert_failed::<&u8, &u8>` in constant functions
 --> /home/runner/work/glacier/glacier/ices/112822.rs:9:17
  |
9 |                 assert_eq!(first, &b'f');
  |                 ^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
  = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0015, E0658.
For more information about an error, try `rustc --explain E0015`.
==============