QWidget crash on Qt5-alpha

sudanix

Hi,

I've successfully build Qt5 on my ubuntu 11.10 machine by clone Qt5 from the repos and follow the build instruction on the wiki.
But when I tried to run my hello world widget application it crashed with this message:

No platform plugin argument was specified, defaulting to "xcb".
QWidget: Cannot create a QWidget when no GUI is being used

any suggestion to solve this?

d2uriel

Can you post the code (should be short if it's a "hello world" app)?

sudanix

Ok, I found the problem. its from my code.
I thought that I should use QGuiApplication instead of QApplication for gui app, and after debugging it appears that the crash happened when QWidget try to get QApplication instance to know the type of the application.

Here is my first Qt5 app :)

@#include <QtWidgets/QApplication>
#include <QtWidgets/QWidget>

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

Thanks.