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// force-host
// no-prefer-dynamic
#![crate_type = "proc-macro"]
#![allow(warnings)]
extern crate proc_macro;
#[proc_macro_derive(A)]
pub unsafe extern "C" fn foo(a: i32, b: u32) -> u32 {
//~^ ERROR: mismatched derive proc macro signature
//~| mismatched derive proc macro signature
//~| mismatched derive proc macro signature
//~| proc macro functions may not be `extern
//~| proc macro functions may not be `unsafe
loop {}
}
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