// Issue an error when the user uses #[no_mangle] on the panic handler //@ edition:2024 #![crate_type="lib"] #![no_std] #![no_main] use core::panic::PanicInfo; #[unsafe(no_mangle)] //~ ERROR `#[no_mangle]` cannot be used on internal language items #[panic_handler] pub unsafe fn panic_fmt(pi: &PanicInfo) -> ! { loop {} }