Program terminated with signal SIGSEGV, Segmentation fault.
#0  0xb16da367 in QWindow::handle (this=this@entry=0xc5cefe0) at /home/user/devel/qt5/qtbase/src/gui/kernel/qwindow.cpp:1721
1721	/home/user/devel/qt5/qtbase/src/gui/kernel/qwindow.cpp: No such file or directory.
#0  0xb16da367 in QWindow::handle (this=this@entry=0xc5cefe0) at /home/user/devel/qt5/qtbase/src/gui/kernel/qwindow.cpp:1721
#1  0xb6ecbab9 in QApplicationPrivate::isWindowBlocked (this=0xc12d428, window=0x15b4ec58, blockingWindow=0xbfbeda40) at /home/user/devel/qt5/qtbase/src/widgets/kernel/qapplication.cpp:2531
#2  0xb16cf377 in QGuiApplicationPrivate::updateBlockedStatus (window=window@entry=0x15b4ec58) at /home/user/devel/qt5/qtbase/src/gui/kernel/qguiapplication.cpp:737
#3  0xb16ddc28 in QWindow::setTransientParent (this=this@entry=0x15b4ec58, parent=0x15c11a88) at /home/user/devel/qt5/qtbase/src/gui/kernel/qwindow.cpp:1201
#4  0xb6f08761 in QWidgetPrivate::create_sys (this=this@entry=0x15baa800, window=window@entry=0, initializeWindow=initializeWindow@entry=true, destroyOldWindow=destroyOldWindow@entry=true) at /home/user/devel/qt5/qtbase/src/widgets/kernel/qwidget.cpp:1466
#5  0xb6f07edc in QWidget::create (this=this@entry=0x15baa780, window=window@entry=0, initializeWindow=initializeWindow@entry=true, destroyOldWindow=destroyOldWindow@entry=true) at /home/user/devel/qt5/qtbase/src/widgets/kernel/qwidget.cpp:1340
#6  0xb6f14aa5 in QWidget::setVisible (this=this@entry=0x15baa780, visible=visible@entry=true) at /home/user/devel/qt5/qtbase/src/widgets/kernel/qwidget.cpp:8158
#7  0xb70e80fa in QDialog::setVisible (this=0x15baa780, visible=true) at /home/user/devel/qt5/qtbase/src/widgets/dialogs/qdialog.cpp:726
#8  0xb6f11588 in QWidget::show (this=0x15baa780) at /home/user/devel/qt5/qtbase/src/widgets/kernel/qwidget.cpp:7761