尝试从插槽更改 QTableWidgetItem 的前台时出现分段错误

问：

当我尝试动态创建表及其项目时出现错误。根据 QComboBox 项的状态，我正在更改 Qt：DisplayRole 项的背景颜色。行数是随机的，可能会有所不同。错误仅在行的特定索引之后发生。就像有 15 排一样，它可能会或不会在第 5 排、第 6 排或第 14 排崩溃。它总是一个随机数，我不明白为什么。我知道该错误可能与项目的错误索引有关。但是当我调试我的应用程序时，qDebug（）索引总是正确的

下面是我的代码的一个略微简化的示例：

QList<QTableWidget *> tableList; //Global variable;
QList<QComboBox *> comboBoxList; //Global variable;

int rowCount = 5;
int columnCount = 2;

tableList.append(new QTableWidget());
tableList.last()->setRowCount(rowCount);
tableList.last()->setColumnCount(columnCount);


for (int row = 0; row < tableList.last()->rowCount(); row++) 
{
    tableList.last()->setItem(row, 0, new QTableWidgetItem());
// This is the problematic item that causes segmentation fault \/
    tableList.last()->item(row, 0)->setData(Qt::DisplayRole, QVariant(1));

    QComboBox *tmpComboBox = new QComboBox();
// My stupid temporary workaround with row indexes that also could cause troubles, but overall it works
    tmpComboBox->setObjectName(QString::number(row));
    
    comboBoxList.append(tmpComboBox);
    comboBoxList.last()->addItem("on", "on");
    comboBoxList.last()->addItem("off", "off"); 
    tableList.last()->setItem(row, 1, comboBoxList.last())

    connect(comboBoxList->last(), SIGNAL(currentIndexChanged(int)), this, SLOT(onStateChanged(int)));

}

// Slot realisation
void Widget::onStateChanged(int stateIndex) 
{
   const int on = 0;
   const int off = 1;
// My stupid temporary workaround with row indexies that also could cause troubles, but overall it works
   int currentRow = sender()->objectName().toInt();

   if(stateIndex == off) 
   {
     //This is the place of crash
     tableList.at(someIndexOfExistingTable)->item(currentRow, 0)->setForeground(Qt::Gray)
   }
   else 
   {
     //Also the place
     tableList.at(someIndexOfExistingTable)->item(currentRow, 0)->setForeground(Qt::Black)
   }
}

我试图捕获一个错误，它只发生在setForeground（）的最后一部分。我试探它适用于表中的所有项目。但它只适用于其中的几个。当我尝试更改项目的 QFlags 时，此错误也会重复出现。我还尝试手动指向项目的现有索引，但应用程序也因分段错误而崩溃。ChatGPT 也没有帮助我:)