src/test/ui/proc-macro/auxiliary/derive-helper-shadowing.rs

// force-host
// no-prefer-dynamic

#![crate_type = "proc-macro"]

extern crate proc_macro;
use proc_macro::*;

#[proc_macro_derive(GenHelperUse)]
pub fn derive_a(_: TokenStream) -> TokenStream {
    "
    #[empty_helper]
    struct Uwu;
    ".parse().unwrap()
}