{"ast_node_type":"other","tokens":[{"end":108,"kind":"keyword","start":0,"text":"desc"}]}
        desc { |tcx| "checking assoc item `{}` is compatible with trait definition", tcx.def_path_str(key) }
    query compare_impl_item(key: LocalDefId) -> Result<(), ErrorGuaranteed> {
        return_result_from_ensure_ok