/*
     * The oldest and stable timestamps must always satisfy the condition that oldest <= stable.
     */
    if ((has_oldest || has_stable) && (has_oldest || txn_global->has_oldest_timestamp) &&
      (has_stable || txn_global->has_stable_timestamp) && oldest_ts > stable_ts) {
        __wt_readunlock(session, &txn_global->rwlock);
        WT_RET_MSG(session, EINVAL,
          "set_timestamp: oldest timestamp %s must not be later than "
          "stable timestamp %s",
          __wt_timestamp_to_string(oldest_ts, ts_string[0]),
          __wt_timestamp_to_string(stable_ts, ts_string[1]));
    }

(gdb) p (*(WT_CONNECTION_IMPL*)session->iface.connection)->txn_global
$17 = {current = 68200, last_running = 68200, oldest_id = 68200, durable_timestamp = 112793, last_ckpt_timestamp = 0, meta_ckpt_timestamp = 0,
  oldest_timestamp = 93921, pinned_timestamp = 93921, recovery_timestamp = 0, stable_timestamp = 0, has_durable_timestamp = true,