ices/109523.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#109523

enum Either {
    One(X),
    Two(X),
}

struct X;

fn move_into_fnmut() {
    let x = Either::One(X);
    let y = || {
        let Either::Two(a) = x;
    };
}

fn main() { }

=== stdout ===
=== stderr ===
warning: unused variable: `y`
  --> /home/runner/work/glacier/glacier/ices/109523.rs:10:9
   |
10 |     let y = || {
   |         ^ help: if this is intentional, prefix it with an underscore: `_y`
   |
   = note: `#[warn(unused_variables)]` on by default

error[E0005]: refutable pattern in local binding
  --> /home/runner/work/glacier/glacier/ices/109523.rs:11:13
   |
11 |         let Either::Two(a) = x;
   |             ^^^^^^^^^^^^^^ pattern `Either::One(_)` not covered
   |
   = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant
   = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html
note: `Either` defined here
  --> /home/runner/work/glacier/glacier/ices/109523.rs:1:6
   |
1  | enum Either {
   |      ^^^^^^
2  |     One(X),
   |     --- not covered
   = note: the matched value is of type `Either`
help: you might want to use `let else` to handle the variant that isn't matched
   |
11 |         let Either::Two(a) = x else { todo!() };
   |                                ++++++++++++++++

error: aborting due to previous error; 1 warning emitted

For more information about this error, try `rustc --explain E0005`.
==============