gcc/testsuite/rust/compile/issues/2951.rs

#![feature(no_core)]
#![no_core]

#![feature(lang_items)]
#[lang = "sized"]
pub trait Sized {}

#[lang = "clone"]
pub trait Clone: Sized {
    fn clone(&self) -> Self;
}

impl Clone for ! {
    fn clone(&self) -> Self {
        *self
    }
}