{"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"//"}]}
    // consider higher-ranked predicates such as `for<'a> &'a mut [u8]: Copy` to
    // Even though this impl has no type or const generic parameters, because we don't
    // be trivially false. We must now check that the impl has no impossible-to-satisfy