QLabel->setText() executed in a method causes program crash

Hi all,

I have an issue : When I want to execute a QLabel->setText() in the method "modifItem", it causes a program crash.
When I execute the lcd4->setText() in the constructor, it works, but not in the method "modifItem". --> lcd4 attribute seems to not be recognized even if lcd4 lights in red... It only happens with a QLabel or a QLCDNumber... I tried with a QTableWidgetItem->setItem() and it works well.

Caisse3.cpp

Code:

---

Caisse3::Caisse3():QWidget()
{
        QLabel*lcd4 = new QLabel();
               lcd4->setFixedSize(200,30);
               lcd4->setFrameStyle(QFrame::Panel | QFrame::Sunken);
        QVBoxLayout *layout5 = new QVBoxLayout;
               layout5->addWidget(lcd4);
}
 
void Caisse3::modifItem(int row, int column)
{
    QString nomArticle=listBoissonsDenom[row];
    lcd4->setText(nomArticle);
}

---

Caisse3.h

Code:

---

class Caisse3:public QWidget{
 
    Q_OBJECT 
 
    public:
        Caisse3();
 
    public slots:
        void modifItem(int row, int column)
 
   private:
        QLabel *lcd4;
        QVBoxLayout *layout5;

---

Thanks for your help.

In Caisse3::Caisse3(), you declare a local variable named lcd4, thus shadowing the lcd4 member of Caisse3. That member remains uninitialized (and therefore contains garbage), which causes a crash when you dereference it in Caisse3::modifItem().

Thank you !!