Creating an object of QGraphicsScene results in segmentation fault

I created a new Qt 5 project with QtCreator, and added the following lines to it.

#include <QGraphicsScene>

// in main():
QGraphicsScene scene;

In the .pro file I added:
Qt += gui

The object creation of QGraphicsScene is resulting in the segmentation fault. What point am I missing?

This works without issue Qt 5.2, GCC 4.7 on Linux:

Code:

---

#include <QApplication>
#include <QGraphicsScene>
 
int main(int argc, char **argv) {
    QApplication app(argc, argv);
    QGraphicsScene scene;
    return 0;
}

---

The QApplication must exist before the scene or it seg faults here too.

Thanks for respondng.


I realized now that instead of QApplication my rest of the program is using QtGui/QGuiApplication.

How to use QGraphicsScene with QtGui/QGuiApplication?

You can't. QGraphicsScene is part of QtWidgets and intimately connected to a full QApplication instance.

And you will also need

Code:

---

QT += widgets

---

to add the widget library

Cheers,
_