[Interest] Qt5 qml only and qfiledialog, qfontdialog, ... crash

[qtnext]

Hi,

I have started  a new desktop application  trying to use only qml with 
Qt5 : I need to choose file. There is now no ready to use components to 
open, choose a file, so I have tryed to add widgets module in the pro 
file, and use Qfiledialog ... I can open QFileDialog, but when I close 
the dialog box, the function in my apps corresponding to the after is 
executed just after, but it close the apps just after ...  my 
application is derived from qapplication ... Is it forbidden to mix a 
qquickview and real qwidget dialog box  or is it a bug ?