"5.6.0 windows" QWidgetPrivate::hide_sys QDesktopScreenWidget(0x291caea3ed0 [isWindow] window=QWidgetWindow(0x291caea18d0, name="QWidgetClassWindow"), handle=QPlatformWindow(0x291cae7c0f0)) QWidgetPrivate::showChildren MainWindow(0xd716affac0 [isWindow] window=QWidgetWindow(0x291caea1960, name="MainWindowClassWindow"), handle=QPlatformWindow(0x291cae7c640)) QWidgetPrivate::showChildren Looking at QWidget(0x0) QWidgetPrivate::showChildren continue QWidgetPrivate::showChildren Looking at QPushButton(0x291caea4480) QWidgetPrivate::showChildren on-spontaneous QWidgetPrivate::showChildren show QWidgetPrivate::showChildren QPushButton(0x291caea4480) QWidgetPrivate::showChildren Looking at QWidget(0x0) QWidgetPrivate::showChildren continue QWidgetPrivate::showChildren Looking at QWidget(0x0) QWidgetPrivate::showChildren continue QWidgetPrivate::showChildren QDialog(0x291caf495a0 [isWindow] window=QWidgetWindow(0x291caf5cf60, name="QDialogClassWindow"), handle=QPlatformWindow(0x291caed2230)) QWidgetPrivate::showChildren Looking at QWidget(0x0) QWidgetPrivate::showChildren continue QWidgetPrivate::showChildren Looking at QGroupBox(0x291caf4a1e0 window=QWidgetWindow(0x291caf5ca50, name="QGroupBoxClassWindow"), handle=QPlatformWindow(0x291caed2ab0) window-parent=QWidgetWindow(0x291caf5cf60, name="QDialogClassWindow"), handle=QPlatformWindow(0x291caed2230)) QWidgetPrivate::showChildren on-spontaneous QWidgetPrivate::showChildren show QWidgetPrivate::showChildren QGroupBox(0x291caf4a1e0 window=QWidgetWindow(0x291caf5ca50, name="QGroupBoxClassWindow"), handle=QPlatformWindow(0x291caed2ab0) window-parent=QWidgetWindow(0x291caf5cf60, name="QDialogClassWindow"), handle=QPlatformWindow(0x291caed2230)) QWidgetPrivate::hide_sys QDialog(0x291caf495a0 [isWindow] window=QWidgetWindow(0x291caf5cf60, name="QDialogClassWindow"), handle=QPlatformWindow(0x291caed2230)) QWidgetPrivate::showChildren QDialog(0x291caf495a0 [isWindow] window=QWidgetWindow(0x291caf5cf60, name="QDialogClassWindow"), handle=QPlatformWindow(0)) QWidgetPrivate::showChildren Looking at QWidget(0x0) QWidgetPrivate::showChildren continue QWidgetPrivate::showChildren Looking at QGroupBox(0x291caf4a1e0 window=QWidgetWindow(0x291caf5ca50, name="QGroupBoxClassWindow"), handle=QPlatformWindow(0) window-parent=QWidgetWindow(0x291caf5cf60, name="QDialogClassWindow"), handle=QPlatformWindow(0)) QWidgetPrivate::showChildren on-spontaneous QWidgetPrivate::showChildren show_recursive QWidgetPrivate::showChildren QGroupBox(0x291caf4a1e0 window=QWidgetWindow(0x291caf5ca50, name="QGroupBoxClassWindow"), handle=QPlatformWindow(0) window-parent=QWidgetWindow(0x291caf5cf60, name="QDialogClassWindow"), handle=QPlatformWindow(0)) WindowCreationData::create: CreateWindowEx failed (Cannot create a top-level child window.) ASSERT: "platformWindow" in file kernel\qwindow.cpp, line 396