{"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"//"}]}
            // To get the fallback body of an intrinsic, we need to convert it to an item.
        let instance = match instance.def {
            ty::InstanceKind::Intrinsic(def_id) => ty::Instance::new_raw(def_id, instance.args),