ices/87877.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#87877

macro_rules! two_items {() => (
    extern {}
    extern {}
)}

macro_rules! single_item_funneler {( $item:item ) => ( $item )}

fn inside_some_function() {
    single_item_funneler! { two_items! {} }
}

=== stdout ===
=== stderr ===
error[E0601]: `main` function not found in crate `87877`
  --> /home/runner/work/glacier/glacier/ices/87877.rs:1:1
   |
1  | / macro_rules! two_items {() => (
2  | |     extern {}
3  | |     extern {}
4  | | )}
...  |
9  | |     single_item_funneler! { two_items! {} }
10 | | }
   | |_^ consider adding a `main` function to `/home/runner/work/glacier/glacier/ices/87877.rs`

error: aborting due to previous error

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