ices/80531.rs: fixed with no errors

[github-actions]

Issue: rust-lang/rust#80531

#![crate_type = "lib"]

enum ConstGenericEnum<const N: usize> {
    Foo([i32; N]),
    Bar,
}

fn foo<const N: usize>(val: &ConstGenericEnum<N>) {
    if let ConstGenericEnum::<N>::Foo(field, ..) = val {
        todo!()
    } else {
        todo!()
    }
}

=== stdout ===
=== stderr ===
warning: unused variable: `field`
 --> /home/runner/work/glacier/glacier/ices/80531.rs:9:39
  |
9 |     if let ConstGenericEnum::<N>::Foo(field, ..) = val {
  |                                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_field`
  |
  = note: `#[warn(unused_variables)]` on by default

warning: enum is never used: `ConstGenericEnum`
 --> /home/runner/work/glacier/glacier/ices/80531.rs:3:6
  |
3 | enum ConstGenericEnum<const N: usize> {
  |      ^^^^^^^^^^^^^^^^
  |
  = note: `#[warn(dead_code)]` on by default

warning: function is never used: `foo`
 --> /home/runner/work/glacier/glacier/ices/80531.rs:8:4
  |
8 | fn foo<const N: usize>(val: &ConstGenericEnum<N>) {
  |    ^^^

warning: 3 warnings emitted

==============