File: issue-38586.rs

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rustc 1.89.0%2Bdfsg1-1~bpo13%2B2
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extern crate proc_macro;

#[proc_macro_derive(A)]
pub fn derive_a(_: proc_macro::TokenStream) -> proc_macro::TokenStream {
    "fn f() { println!(\"{}\", foo); }".parse().unwrap()
}