{"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"assert!(dst.llextra.is_none(),"}]}
        assert!(dst.llextra.is_none(), "cannot directly copy into unsized values");
        assert!(src.llextra.is_none(), "cannot directly copy from unsized values");
        if flags.contains(MemFlags::NONTEMPORAL) {