rust/tests/ui/lang-items/bad-add-impl.rs

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#![feature(no_core)]
#![feature(lang_items)]
#![no_core]
#[lang = "sized"]
trait Sized {}
#[lang = "add"]
trait Add<T> {
const add: u32 = 1u32;
}
impl Add<u32> for u32 {}
fn main() {
1u32 + 1u32;
//~^ ERROR cannot add `u32` to `u32`
}