ices/82909.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#82909

struct Sum(u32, u32);
impl PartialEq for Sum {
    fn eq(&self, other: &Self) -> bool {
        0 == 0
    }
}
#[derive(PartialEq)]
enum Eek {
    UnusedByTheConst(Sum),
}
const SUM_THREE: Eek = Eek::UnusedByTheConst(Sum(3, 0));
const EEK_ONE: &[Eek] = &[SUM_THREE];
fn main() {
    match &&&[][..] {
        &&EEK_ONE => {}
    }
}

=== stdout ===
=== stderr ===
warning: to use a constant of type `Eek` in a pattern, `Eek` must be annotated with `#[derive(PartialEq, Eq)]`
  --> /home/runner/work/glacier/glacier/ices/82909.rs:15:11
   |
15 |         &&EEK_ONE => {}
   |           ^^^^^^^
   |
   = note: `#[warn(indirect_structural_match)]` on by default
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #62411 <https://github.com/rust-lang/rust/issues/62411>

error[E0004]: non-exhaustive patterns: `&&&_` not covered
  --> /home/runner/work/glacier/glacier/ices/82909.rs:14:11
   |
14 |     match &&&[][..] {
   |           ^^^^^^^^^ pattern `&&&_` not covered
   |
   = note: the matched value is of type `&&&[Eek]`
help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern or an explicit pattern as shown
   |
15 ~         &&EEK_ONE => {}
16 +         &&&_ => todo!()
   |

warning: unused variable: `other`
 --> /home/runner/work/glacier/glacier/ices/82909.rs:3:18
  |
3 |     fn eq(&self, other: &Self) -> bool {
  |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
  |
  = note: `#[warn(unused_variables)]` on by default

error: aborting due to previous error; 2 warnings emitted

For more information about this error, try `rustc --explain E0004`.
==============