This happens to me that my computer forces qt to exit because my disk is running out of memory

Should we skip syncing or check and show warning beforehand  when disk size available is enough for syncing all blocks?

Also wondering how large free disks should I prepare for syncing all the blocks?
on any a
    connOptions.bind_on_any = args.GetArgs("-bind").empty() && args.GetArgs("-whitebind").empty();
     Emit a warning if a bad port is given to -port= but only if -bind and -whitebind are not
     given, because if they are, then -port= is ignored.
    if (connOptions.bind_on_any && args.IsArgSet("-port")) {
        const uint16_t port_arg = args.GetIntArg("-port", 0);
        if (IsBadPort(port_arg)) {
            InitWarning(BadPortWarning("-port", port_arg));
        }
    }
    CService onion_service_target;
    if (!connOptions.onion_binds.empty()) {
        onion_service_target = connOptions.onion_binds.front();
    } else {
        onion_service_target = DefaultOnionServiceTarget();
        connOptions.onion_binds.push_back(onion_service_target);
    }
    if (args.GetBoolArg("-listenonion", DEFAULT_LISTEN_ONION)) {
        if (connOptions.onion_binds.size() > 1) {
            InitWarning(strprintf(_("More than one onion bind address is provided. Using %s "
                                    "for the automatically created Tor onion service."),
                                  onion_service_target.ToStringIPPort()));
        }
        StartTorControl(onion_service_target);
    }
    if (connOptions.bind_on_any) {
         Only 
         any a
        Discover();
    }