Resize causes segmentation fault

Pippin

Hello, here's a sample of my code:

class Base : public QMainWindow
{
    Q_OBJECT
    
    protected:
    
        QWidget*   centralWidget;
        QTextEdit* foo;
        // ...
};

Base's constructor is implemented as follows:

Base::Base(void) :
    QMainWindow(),
    centralWidget(new QWidget()),
    foo(new QTextEdit(centralWidget)),
    // ...
{
    QMainWindow::setCentralWidget(centralWidget);
    // ...
}

Now, here's a derived class.

class Derived : public Base
{
    Q_OBJECT

    // ...
};

Derived's constructor is implemented as follows:

Derived::Derived(void) :
    Base(),
    // ...
{
    // ...
    foo->resize(436, 124);
    // ...
}

Unfortunately, foo->resize(436, 124); often causes a segmentation fault. I say often because it sometimes (althrough rarely) doesn't... If that helps, here's the relevant track:

/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5(_ZNK7QWidget20testAttribute_helperEN2Qt15WidgetAttributeE+0x1e)[0x7fd396049aae]
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5(_ZN7QWidget12setAttributeEN2Qt15WidgetAttributeEb+0x167)[0x7fd396051667]
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5(_ZN7QWidget6resizeERK5QSize+0x1d)[0x7fd396056d2d]

Any insight?

SGaist

Hi,

Out of curiosity, why resize that QTextEdit and not set it as central widget ?

Also, which version of Qt are you using ?

Pippin

@SGaist I'm sorry but I don't get your question. There are many Widgets on that window, and I want this QTextEdit to have that particular size (, at that particular place).

I believe that this is Qt 5.6

Edit: If I swap this line with foo->move(...); then I get a segmentation fault there. It looks like whatever member function will cause a segfault.

Pippin

Solved: It looks like I forgot to delete a member variable inside Derived, whose name was... foo. I do apologize for wasting everyone's time...