抛出'std :: bad_alloc'实例后调用QT Lambda终止

Question

使用QStringList的QT lambda有错误：抛出'std :: bad_alloc'实例后调用终止   what（）：std :: bad_alloc

但是在c ++ STL中没有问题

我不为什么

//QT
Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
ui->setupUi(this);
    ui->tableWidget->setColumnCount(3);
    ui->tableWidget->setHorizontalHeaderLabels(QStringList()<<"name"<<"sex"<<"age");
    QVector<QString> nameList;
    nameList<<"sam"<<"tom"<<"red"<<"lily"<<"tim"<<"sky";
    QStringList sexList;
    sexList<<"man"<<"man"<<"man"<<"women"<<"man"<<"woman";
    ui->tableWidget->setRowCount(nameList.size());
    for(int i=0;i<nameList.size();i++){
        int k=0;
        ui->tableWidget->setItem(i,k++,new QTableWidgetItem(nameList[i]));
        ui->tableWidget->setItem(i,k++,new QTableWidgetItem(sexList[i]));
        ui->tableWidget->setItem(i,k++,new QTableWidgetItem(QString::number(i+20)));
    }

    //这里的lambda用&引用
    connect(ui->pushButton,&QPushButton::clicked,[&](){
        bool flag = false;
        QString zhao = "tiger";
        for(int i=0;i<nameList.size();i++){
           if(nameList[i] == zhao){
               flag = true;
           }
        };
        if(!flag){
             nameList<<zhao;
             ui->tableWidget->insertRow(0);
             ui->tableWidget->setItem(0,0,new QTableWidgetItem(zhao));
             ui->tableWidget->setItem(0,1,new QTableWidgetItem("mam"));
             ui->tableWidget->setItem(0,2,new QTableWidgetItem("21"));
        }
    });
}

//c++ STL
int main()
{
    vector<string> vs({ "sam", "tom" , "red" , "lily" , "tim" , "sky" });
    string xiang = "tiger";
    auto fun = [& ]() {
        bool flag = false;
        for (auto iter = vs.begin(); iter != vs.end(); iter++) {
            if (*iter == xiang)
            {
                flag = true;
            }
        }

        if (!flag) {
            vs.push_back(xiang);
        }
    };
    fun();
    for (auto iter = vs.begin(); iter != vs.end(); iter++) {
        cout << *iter << endl;
    }

}

//没关系

抛出'std :: bad_alloc'实例后调用

terminate   what（）：std :: bad_alloc