QPrintDialog constructor is crashing

The constructor of QPrintDialog crashes. According to the adress sanitizer it is a heap-use-after-free error. The problem has been found with the bode example you find in the qwt ( qwt.sf.net ) examples from svn trunk.

Below you find the out, when Qt has been build with asan support:

=================================================================
==17993==ERROR: AddressSanitizer: heap-use-after-free on address 0x6040001c3498 at pc 0x7fad8993f0d7 bp 0x7ffc56521af0 sp 0x7ffc56521ae8
READ of size 8 at 0x6040001c3498 thread T0
#0 0x7fad8993f0d6 in QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::operator->() const ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:118
#1 0x7fad8993f0d6 in decltype (({parm#1}.(operator->))()) qGetPtrHelper<QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> > >(QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >&) ../../include/QtCore/../../src/corelib/global/qglobal.h:1127
#2 0x7fad8993f0d6 in QWidget::d_func() ../../include/QtWidgets/../../src/widgets/kernel/qwidget.h:132
#3 0x7fad8993f0d6 in QWidget::setEnabled(bool) kernel/qwidget.cpp:3221
#4 0x7fad8c73fc37 in QPrintDialogPrivate::selectPrinter(QPrinter::OutputFormat) dialogs/qprintdialog_unix.cpp:733
#5 0x7fad8c744234 in QUnixPrintWidgetPrivate::setOptionsPane(QPrintDialogPrivate*) dialogs/qprintdialog_unix.cpp:1275
#6 0x7fad8c744d99 in QPrintDialogPrivate::init() dialogs/qprintdialog_unix.cpp:644
#7 0x7fad8c745d2c in QPrintDialog::QPrintDialog(QPrinter*, QWidget*) dialogs/qprintdialog_unix.cpp:1061
#8 0x40fd0a in MainWindow::print() /home/uwe/qwt/qwt-git/examples/bode/mainwindow.cpp:171
#9 0x412858 in MainWindow::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) moc/moc_mainwindow.cpp:87
#10 0x7fad87ac8f35 in void doActivate<false>(QObject*, int, void**) kernel/qobject.cpp:3882
#11 0x7fad87ab1ddb in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) kernel/qobject.cpp:3930
#12 0x7fad89cef994 in QAbstractButton::clicked(bool) .moc/moc_qabstractbutton.cpp:313
#13 0x7fad89cf02aa in QAbstractButtonPrivate::emitClicked() widgets/qabstractbutton.cpp:415
#14 0x7fad89cf6679 in QAbstractButtonPrivate::click() widgets/qabstractbutton.cpp:408
#15 0x7fad89cf6da3 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) widgets/qabstractbutton.cpp:1012
#16 0x7fad8a15bc21 in QToolButton::mouseReleaseEvent(QMouseEvent*) widgets/qtoolbutton.cpp:622
#17 0x7fad8995a66c in QWidget::event(QEvent*) kernel/qwidget.cpp:8631
#18 0x7fad89cfbab9 in QAbstractButton::event(QEvent*) widgets/qabstractbutton.cpp:969
#19 0x7fad8a15bf67 in QToolButton::event(QEvent*) widgets/qtoolbutton.cpp:1002
#20 0x7fad89800102 in QApplicationPrivate::notify_helper(QObject*, QEvent*) kernel/qapplication.cpp:3693
#21 0x7fad8982295f in QApplication::notify(QObject*, QEvent*) kernel/qapplication.cpp:3137
#22 0x7fad879f611f in QCoreApplication::notifyInternal2(QObject*, QEvent*) kernel/qcoreapplication.cpp:1092
#23 0x7fad879f6a9c in QCoreApplication::sendSpontaneousEvent(QObject*, QEvent*) kernel/qcoreapplication.cpp:1499
#24 0x7fad8981cdb0 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool, bool) kernel/qapplication.cpp:2623
#25 0x7fad899d71b0 in QWidgetWindow::handleMouseEvent(QMouseEvent*) kernel/qwidgetwindow.cpp:673
#26 0x7fad899e0205 in QWidgetWindow::event(QEvent*) kernel/qwidgetwindow.cpp:295
#27 0x7fad89800102 in QApplicationPrivate::notify_helper(QObject*, QEvent*) kernel/qapplication.cpp:3693
#28 0x7fad898211f8 in QApplication::notify(QObject*, QEvent*) kernel/qapplication.cpp:3033
#29 0x7fad879f611f in QCoreApplication::notifyInternal2(QObject*, QEvent*) kernel/qcoreapplication.cpp:1092
#30 0x7fad879f6a9c in QCoreApplication::sendSpontaneousEvent(QObject*, QEvent*) kernel/qcoreapplication.cpp:1499
#31 0x7fad88464930 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) kernel/qguiapplication.cpp:2188
#32 0x7fad884699ae in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) kernel/qguiapplication.cpp:1920
#33 0x7fad883bc836 in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) kernel/qwindowsysteminterface.cpp:1163
#34 0x7fad7e430570 in xcbSourceDispatch /disk3/qt/qt-everywhere-src-5.14.0/qtbase/src/plugins/platforms/xcb/qxcbeventdispatcher.cpp:105
#35 0x7fad84616e86 in g_main_context_dispatch (/usr/lib64/libglib-2.0.so.0+0x4de86)
#36 0x7fad8461722f (/usr/lib64/libglib-2.0.so.0+0x4e22f)
#37 0x7fad846172bb in g_main_context_iteration (/usr/lib64/libglib-2.0.so.0+0x4e2bb)
#38 0x7fad87b5c659 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) kernel/qeventdispatcher_glib.cpp:423
#39 0x7fad7e430ef9 in QXcbGlibEventDispatcher::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) /disk3/qt/qt-everywhere-src-5.14.0/qtbase/src/plugins/platforms/xcb/qxcbeventdispatcher.cpp:143
#40 0x7fad879edc13 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) kernel/qeventloop.cpp:138
#41 0x7fad879ef02b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) kernel/qeventloop.cpp:225
#42 0x7fad87a0f6d7 in QCoreApplication::exec() kernel/qcoreapplication.cpp:1400
#43 0x7fad88438d1b in QGuiApplication::exec() kernel/qguiapplication.cpp:1845
#44 0x7fad897fff9e in QApplication::exec() kernel/qapplication.cpp:2833
#45 0x412487 in main /home/uwe/qwt/qwt-git/examples/bode/main.cpp:21
#46 0x7fad86085f89 in __libc_start_main (/lib64/libc.so.6+0x20f89)
#47 0x409819 in _start (/home/uwe/qwt/qwt-git/examples/bin/bode+0x409819)

0x6040001c3498 is located 8 bytes inside of 48-byte region [0x6040001c3490,0x6040001c34c0)
freed by thread T0 here:
#0 0x7fad8b6f2428 in operator delete(void*, unsigned long) (/usr/lib64/libasan.so.5+0xee428)
#1 0x7fad89fcd8f7 in QRadioButton::~QRadioButton() widgets/qradiobutton.cpp:145
#2 0x7fad8c744c79 in QPrintDialogPrivate::init() dialogs/qprintdialog_unix.cpp:641
#3 0x7fad8c745d2c in QPrintDialog::QPrintDialog(QPrinter*, QWidget*) dialogs/qprintdialog_unix.cpp:1061
#4 0x40fd0a in MainWindow::print() /home/uwe/qwt/qwt-git/examples/bode/mainwindow.cpp:171
#5 0x412858 in MainWindow::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) moc/moc_mainwindow.cpp:87
#6 0x7fad87ac8f35 in void doActivate<false>(QObject*, int, void**) kernel/qobject.cpp:3882
#7 0x7fad87ab1ddb in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) kernel/qobject.cpp:3930
#8 0x7fad89cef994 in QAbstractButton::clicked(bool) .moc/moc_qabstractbutton.cpp:313
#9 0x7fad89cf02aa in QAbstractButtonPrivate::emitClicked() widgets/qabstractbutton.cpp:415
#10 0x7fad89cf6679 in QAbstractButtonPrivate::click() widgets/qabstractbutton.cpp:408
#11 0x7fad89cf6da3 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) widgets/qabstractbutton.cpp:1012
#12 0x7fad8a15bc21 in QToolButton::mouseReleaseEvent(QMouseEvent*) widgets/qtoolbutton.cpp:622
#13 0x7fad8995a66c in QWidget::event(QEvent*) kernel/qwidget.cpp:8631
#14 0x7fad89cfbab9 in QAbstractButton::event(QEvent*) widgets/qabstractbutton.cpp:969
#15 0x7fad8a15bf67 in QToolButton::event(QEvent*) widgets/qtoolbutton.cpp:1002
#16 0x7fad89800102 in QApplicationPrivate::notify_helper(QObject*, QEvent*) kernel/qapplication.cpp:3693
#17 0x7fad8982295f in QApplication::notify(QObject*, QEvent*) kernel/qapplication.cpp:3137
#18 0x7fad879f611f in QCoreApplication::notifyInternal2(QObject*, QEvent*) kernel/qcoreapplication.cpp:1092
#19 0x7fad879f6a9c in QCoreApplication::sendSpontaneousEvent(QObject*, QEvent*) kernel/qcoreapplication.cpp:1499
#20 0x7fad8981cdb0 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool, bool) kernel/qapplication.cpp:2623
#21 0x7fad899d71b0 in QWidgetWindow::handleMouseEvent(QMouseEvent*) kernel/qwidgetwindow.cpp:673
#22 0x7fad899e0205 in QWidgetWindow::event(QEvent*) kernel/qwidgetwindow.cpp:295
#23 0x7fad89800102 in QApplicationPrivate::notify_helper(QObject*, QEvent*) kernel/qapplication.cpp:3693
#24 0x7fad898211f8 in QApplication::notify(QObject*, QEvent*) kernel/qapplication.cpp:3033
#25 0x7fad879f611f in QCoreApplication::notifyInternal2(QObject*, QEvent*) kernel/qcoreapplication.cpp:1092
#26 0x7fad879f6a9c in QCoreApplication::sendSpontaneousEvent(QObject*, QEvent*) kernel/qcoreapplication.cpp:1499
#27 0x7fad88464930 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) kernel/qguiapplication.cpp:2188
#28 0x7fad884699ae in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) kernel/qguiapplication.cpp:1920
#29 0x7fad883bc836 in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) kernel/qwindowsysteminterface.cpp:1163

previously allocated by thread T0 here:
#0 0x7fad8b6f1030 in operator new(unsigned long) (/usr/lib64/libasan.so.5+0xed030)
#1 0x7fad8c74c439 in Ui_QPrintSettingsOutput::setupUi(QWidget*) .uic/ui_qprintsettingsoutput.h:149
#2 0x7fad8c744677 in QPrintDialogPrivate::init() dialogs/qprintdialog_unix.cpp:628
#3 0x7fad8c745d2c in QPrintDialog::QPrintDialog(QPrinter*, QWidget*) dialogs/qprintdialog_unix.cpp:1061
#4 0x40fd0a in MainWindow::print() /home/uwe/qwt/qwt-git/examples/bode/mainwindow.cpp:171
#5 0x412858 in MainWindow::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) moc/moc_mainwindow.cpp:87
#6 0x7fad87ac8f35 in void doActivate<false>(QObject*, int, void**) kernel/qobject.cpp:3882
#7 0x7fad87ab1ddb in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) kernel/qobject.cpp:3930
#8 0x7fad89cef994 in QAbstractButton::clicked(bool) .moc/moc_qabstractbutton.cpp:313
#9 0x7fad89cf02aa in QAbstractButtonPrivate::emitClicked() widgets/qabstractbutton.cpp:415
#10 0x7fad89cf6679 in QAbstractButtonPrivate::click() widgets/qabstractbutton.cpp:408
#11 0x7fad89cf6da3 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) widgets/qabstractbutton.cpp:1012
#12 0x7fad8a15bc21 in QToolButton::mouseReleaseEvent(QMouseEvent*) widgets/qtoolbutton.cpp:622
#13 0x7fad8995a66c in QWidget::event(QEvent*) kernel/qwidget.cpp:8631
#14 0x7fad89cfbab9 in QAbstractButton::event(QEvent*) widgets/qabstractbutton.cpp:969
#15 0x7fad8a15bf67 in QToolButton::event(QEvent*) widgets/qtoolbutton.cpp:1002
#16 0x7fad89800102 in QApplicationPrivate::notify_helper(QObject*, QEvent*) kernel/qapplication.cpp:3693
#17 0x7fad8982295f in QApplication::notify(QObject*, QEvent*) kernel/qapplication.cpp:3137
#18 0x7fad879f611f in QCoreApplication::notifyInternal2(QObject*, QEvent*) kernel/qcoreapplication.cpp:1092
#19 0x7fad879f6a9c in QCoreApplication::sendSpontaneousEvent(QObject*, QEvent*) kernel/qcoreapplication.cpp:1499
#20 0x7fad8981cdb0 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool, bool) kernel/qapplication.cpp:2623
#21 0x7fad899d71b0 in QWidgetWindow::handleMouseEvent(QMouseEvent*) kernel/qwidgetwindow.cpp:673
#22 0x7fad899e0205 in QWidgetWindow::event(QEvent*) kernel/qwidgetwindow.cpp:295
#23 0x7fad89800102 in QApplicationPrivate::notify_helper(QObject*, QEvent*) kernel/qapplication.cpp:3693
#24 0x7fad898211f8 in QApplication::notify(QObject*, QEvent*) kernel/qapplication.cpp:3033
#25 0x7fad879f611f in QCoreApplication::notifyInternal2(QObject*, QEvent*) kernel/qcoreapplication.cpp:1092
#26 0x7fad879f6a9c in QCoreApplication::sendSpontaneousEvent(QObject*, QEvent*) kernel/qcoreapplication.cpp:1499
#27 0x7fad88464930 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) kernel/qguiapplication.cpp:2188
#28 0x7fad884699ae in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) kernel/qguiapplication.cpp:1920
#29 0x7fad883bc836 in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) kernel/qwindowsysteminterface.cpp:1163