//@ compile-flags:-C panic=abort #![feature(lang_items)] #![no_std] #![no_main] use core::panic::PanicInfo; #[panic_handler] fn panic(info: &PanicInfo) -> ! { loop {} } #[lang = "panic_impl"] fn panic2(info: &PanicInfo) -> ! { //~ ERROR found duplicate lang item `panic_impl` loop {} }