ices/58987-1.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#58987

use std::mem;

fn foo<T: ?Sized>(t: T) {
    let _ = [(); 0 - !(mem::size_of::<&T>() == mem::size_of::<[usize; 2]>()) as usize];
}

fn main() {}

=== stdout ===
=== stderr ===
error[E0277]: the size for values of type `T` cannot be known at compilation time
 --> /home/runner/work/glacier/glacier/ices/58987-1.rs:3:19
  |
3 | fn foo<T: ?Sized>(t: T) {
  |        -          ^ doesn't have a size known at compile-time
  |        |
  |        this type parameter needs to be `std::marker::Sized`
  |
  = help: the trait `std::marker::Sized` is not implemented for `T`
  = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
  = note: all local variables must have a statically known size
  = help: unsized locals are gated as an unstable feature

error: constant expression depends on a generic parameter
 --> /home/runner/work/glacier/glacier/ices/58987-1.rs:4:18
  |
4 |     let _ = [(); 0 - !(mem::size_of::<&T>() == mem::size_of::<[usize; 2]>()) as usize];
  |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: this may fail depending on what value the parameter takes

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0277`.
==============

[JohnTitor]

So, it's fixed and 58987-2 is still ICE (thanks for taking a look @Alexendoo!).