QWidget crash on creation

sandro4912

I have this code based on a book with QT4. It crashes on QT5 on the creation of QWidget:

#include <QApplication>

#include <QVBoxLayout>
#include <QSlider>

int main(int argc, char** argv)
{
    QApplication(argc, argv);

    QWidget base;
    QVBoxLayout layout( &base );

    QSlider slider( Qt::Horizontal );

    layout.addWidget( &slider );

    base.show();

    return QApplication::exec();
}

On crash it shows this:

1 initFontUnlocked qguiapplication.cpp 250 0x7fecd326f61
2 QGuiApplication::font qguiapplication.cpp 3260 0x7fecd31ddbd
3 QFont::QFont qfont.cpp 611 0x7fecd46d185
4 QWidgetData::QWidgetData Qt5Widgetsd 0x7fece16adb6
5 QWidgetPrivate::QWidgetPrivate qwidget.cpp 262 0x7fece14fe1d
6 QWidget::QWidget qwidget.cpp 1028 0x7fece13f879
7 main main.cpp 11 0x13f113358
8 WinMain qtmain_win.cpp 97 0x13f117dd5
9 invoke_main exe_common.inl 107 0x13f1158dd
10 __scrt_common_main_seh exe_common.inl 288 0x13f11578e
11 __scrt_common_main exe_common.inl 331 0x13f11564e
12 WinMainCRTStartup exe_winmain.cpp 17 0x13f115969
13 BaseThreadInitThunk kernel32 0x772b556d
14 RtlUserThreadStart ntdll 0x7741385d

Is it not allowed to use QWdiget like this anymore?

sandro4912

ok this was stupid it must be

QApplication app(argc, argv);

in the first line not

QApplication(argc, argv);