Creating an object of QDeclarativeView results in segmentation fault - qt

Question

.h
#include <QObject>
#include <QDebug>
class MyClass : public QObject
{
Q_OBJECT
public:
Q_INVOKABLE void cppMethod (const QString &msg)
{
qDebug() << "Called the C++ method with" << msg;
}
public slots:
void cppSlot (int number)
{
qDebug() << "Called the C++ slot with" << number;
}
};
.cpp
#include <QtCore/QCoreApplication>
#include <QDeclarativeEngine>
#include <QDeclarativeComponent>
#include <QDeclarativeContext>
#include <QDeclarativeView>
#include <QVariant>
#include <QMetaObject>
#include "cppFromQml.h"
int main (int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QDeclarativeView view;
return a.exec();
}
This results in segmentation fault. What's the way out?
Qt: 4.8.1

Answer 1

note that you're not using MyClass, and - just my guess - a declarative view will need a QApplication to properly run.
To better understand, I created a project, dumped almost all away (just kept the .pro, where I added qt += declarative), and changed a bit your code as follow:
#include <QApplication>
#include <QDeclarativeEngine>
#include <QDeclarativeComponent>
#include <QDeclarativeContext>
#include <QDeclarativeView>
#include <QVariant>
#include <QMetaObject>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QDeclarativeView view;
view.show();
return a.exec();
}
now it runs and display an empty view, as expected...