求助帖：QT6使用addItem导致程序崩溃，求指点

        ui->comboBoxbrand->clear();
        QString sql = QString("select name from brand where factory = '%1'").arg(arg1);
        QSqlQuery query;
        query.exec(sql);
        while(query.next())
        {
            QString name = query.value("name").toString();
            ui->comboBoxbrand->addItem(name,Qt::DisplayRole);
            //
        }