// dont-check-compiler-stderr // aux-build:some-panic-impl.rs #![feature(lang_items)] #![no_std] #![no_main] extern crate some_panic_impl; use core::panic::PanicInfo; #[panic_handler] fn panic(info: &PanicInfo) -> ! { //~^ ERROR found duplicate lang item `panic_impl` loop {} } #[lang = "eh_personality"] fn eh() {}