ices/64784.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#64784

#![feature(decl_macro)]

pub macro m($i:ident, $j:ident) {
    mod $i {
        pub use crate::$j::*;
        pub struct A;
    }
}

m!(x, y);
m!(y, x);

=== stdout ===
=== stderr ===
error[E0601]: `main` function not found in crate `64784`
  --> /home/runner/work/glacier/glacier/ices/64784.rs:11:10
   |
11 | m!(y, x);
   |          ^ consider adding a `main` function to `/home/runner/work/glacier/glacier/ices/64784.rs`

error: aborting due to previous error

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