ices/79496.sh: fixed with errors

[github-actions]

Issue: rust-lang/rust#79496

#!/bin/bash

cat > out.rs <<'EOF'

#![crate_type="proc-macro"]

extern crate proc_macro;
use proc_macro::TokenStream;

#[proc_macro_derive()]
pub fn some_derive(_: TokenStream) -> TokenStream {
    TokenStream::new()
}


EOF

rustdoc --edition=2021 out.rs

=== stdout ===
=== stderr ===
error: the `#[proc_macro_derive]` attribute is only usable with crates of the `proc-macro` crate type
 --> out.rs:7:1
  |
7 | #[proc_macro_derive()]
  | ^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error

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