ices/86033.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#86033

#![feature(generic_const_exprs)]

pub trait IsTrue<const T: bool> {}
impl IsTrue<true> for () {}

pub trait IsZST {}

impl<T> IsZST for T
where
    (): IsTrue<{ std::mem::size_of::<T>() == 0 }>
{}

fn func() -> impl IsZST {
    || {}
}

=== stdout ===
=== stderr ===
warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
 --> /home/runner/work/glacier/glacier/ices/86033.rs:1:12
  |
1 | #![feature(generic_const_exprs)]
  |            ^^^^^^^^^^^^^^^^^^^
  |
  = note: `#[warn(incomplete_features)]` on by default
  = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information

error[E0601]: `main` function not found in crate `86033`
  --> /home/runner/work/glacier/glacier/ices/86033.rs:1:1
   |
1  | / #![feature(generic_const_exprs)]
2  | |
3  | | pub trait IsTrue<const T: bool> {}
4  | | impl IsTrue<true> for () {}
...  |
14 | |     || {}
15 | | }
   | |_^ consider adding a `main` function to `/home/runner/work/glacier/glacier/ices/86033.rs`

error: aborting due to previous error; 1 warning emitted

For more information about this error, try `rustc --explain E0601`.
==============