From `rend_service_rendezvous_has_opened`: ``` service = rend_service_get_by_pk_digest( circuit->rend_data->rend_pk_digest); if (!service) { log_warn(LD_GENERAL, "Internal error: unrecognized service ID on " "introduction circuit."); reason = END_CIRC_REASON_INTERNAL; goto err; } ``` `.-3s/introduction/rendezvous/`