Application / QApplication problems with Valgrind

Guerrian

I get the following problem with Application / QApplication when running Valgrind in Qt Creator:

Conditional jump or move depends on uninitialised value(s)
  in Application in /home/daniel/Documents/Qt/ElectimaxWin/main.h:7
  1: /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0.2400.30
  2: /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.4800.2
  3: g_signal_emit_valist in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.4800.2
  4: g_signal_emit_by_name in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.4800.2
  5: g_object_set_valist in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.4800.2
  6: g_object_set in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.4800.2
  7: /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.5.1
  8: QStyleFactory::create(QString const&amp;) in /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.5.1
  9: QApplication::style() in /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.5.1
  10: QApplicationPrivate::initialize() in /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.5.1
  11: QApplicationPrivate::construct() in /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5.5.1
  12: Application in /home/daniel/Documents/Qt/ElectimaxWin/main.h:7
  13: main in /home/daniel/Documents/Qt/ElectimaxWin/main.cpp:47
Uninitialised value was created by a stack allocation  1: g_cclosure_marshal_VOID__VOIDv in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.4800.2

Here is my main program:

#include <QApplication>
#include <QMessageBox>
#include <typeinfo>
#include "main.h"
#include "mainwindow.h"

bool Application::notify(QObject* receiver, QEvent* event)
{
    try
    {
        return QApplication::notify(receiver, event);
    }
    catch (std::exception &e)
    {
        qFatal("Error %s sending event %s to object %s (%s)",
            e.what(), typeid(*event).name(), qPrintable(receiver->objectName()), typeid(*receiver).name());
    }
    catch (...)
    {
        qFatal("Error <unknown> sending event %s to object %s (%s)",
            typeid(*event).name(), qPrintable(receiver->objectName()), typeid(*receiver).name());
    }
    return false;
}

int main(int argc, char *argv[])
{
    Application a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}

And main.h:

#include <QApplication>

class Application final : public QApplication
{
    Q_OBJECT
public:
    using QApplication::QApplication;
    virtual bool notify(QObject *receiver, QEvent *e) override;
};

Christian Ehrlicher

As you can see it's somewhere deep inside libgobject/libgtk - don't think Qt can do anything against it here. I would simply ignore it.

Guerrian

Thanks for the tip!

Guerrian

This post is deleted!