gdb bt 3)

```
(gdb) 
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#1  0x00007ffff1725f5d in __GI_abort () at abort.c:90
#2  0x00007ffff171bf17 in __assert_fail_base (fmt=<optimized out>, assertion=assertion@entry=0x5555569645ff "false", file=file@entry=0x555556964590 "/build/scribus-trunk-P6pmTQ/scribus-trunk-1.5.3svn~r22271~20171225~ppa71~ubuntu17.10.1/scribus/scribuscore.cpp", 
    line=line@entry=89, function=function@entry=0x555556964940 "void abort_on_error(QtMsgType, const QMessageLogContext&, const QString&)") at assert.c:92
#3  0x00007ffff171bfc2 in __GI___assert_fail (assertion=0x5555569645ff "false", file=0x555556964590 "/build/scribus-trunk-P6pmTQ/scribus-trunk-1.5.3svn~r22271~20171225~ppa71~ubuntu17.10.1/scribus/scribuscore.cpp", line=89, 
    function=0x555556964940 "void abort_on_error(QtMsgType, const QMessageLogContext&, const QString&)") at assert.c:101
#4  0x0000555556106ad0 in ?? ()
#5  0x00007ffff24555c7 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007ffff24570ee in QMessageLogger::fatal(char const*, ...) const () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007ffff2452357 in qt_assert(char const*, char const*, int) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x0000555556794d33 in StoryText::select(int, int, bool) ()
#9  0x0000555555ddc44d in PageItem::restoreLinkTextFrame(UndoState*, bool) ()
#10 0x0000555555dc9027 in PageItem::restore(UndoState*, bool) ()
#11 0x000055555623ed4a in UndoState::undo() ()
#12 0x000055555623cfc6 in UndoStack::undo(unsigned int, int) ()
#13 0x000055555622f901 in UndoManager::undo(int) ()
#14 0x0000555555b9ce6c in ?? ()
#15 0x00007ffff26788e5 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x0000555555b90cdf in ScrAction::triggeredData(int) ()
#17 0x000055555609582c in ScrAction::triggeredToTriggeredData() ()
#18 0x0000555555b90671 in ?? ()
#19 0x00007ffff26788e5 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007ffff33bdd82 in QAction::triggered(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007ffff33c046c in QAction::activate(QAction::ActionEvent) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007ffff33c0d15 in QAction::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007ffff33c446c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007ffff33cbd34 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007ffff2649de8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007ffff2c36d77 in QShortcutMap::dispatchEvent(QKeyEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#27 0x00007ffff2c36e4a in QShortcutMap::tryShortcut(QKeyEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#28 0x00007ffff2be6473 in QWindowSystemInterface::handleShortcutEvent(QWindow*, unsigned long, int, QFlags<Qt::KeyboardModifier>, unsigned int, unsigned int, unsigned int, QString const&, bool, unsigned short) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#29 0x00007ffff2c059b7 in QGuiApplicationPrivate::processKeyEvent(QWindowSystemInterfacePrivate::KeyEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#30 0x00007ffff2c0aa05 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#31 0x00007ffff2be2cab in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#32 0x00007fffe57185a0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#33 0x00007fffef39ffb7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007fffef3a01f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007fffef3a027c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007ffff26a247f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#37 0x00007ffff2647e3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#38 0x00007ffff2650da4 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#39 0x0000555556758123 in mainApp(int, char**) ()
#40 0x000055555675807d in main ()

```