Would this help? (Output of gdb bt)
Thread 1 “tellico” received signal SIGSEGV, Segmentation fault.
Tellico::Export::HTMLExporter::writeEntryFiles (this=this@entry=0x555557991ab0)
at /usr/src/debug/tellico/tellico-4.2.1/src/translators/htmlexporter.cpp:826
826 bool multipleTitles = collection()->fieldByName(title)->hasFlag(Data::Field::AllowMultiple);
(gdb) bt
#0 Tellico::Export::HTMLExporter::writeEntryFiles (this=this@entry=0x555557991ab0)
at /usr/src/debug/tellico/tellico-4.2.1/src/translators/htmlexporter.cpp:826
#1 0x000055555588d3f0 in Tellico::Export::HTMLExporter::exec (this=0x555557991ab0)
at /usr/src/debug/tellico/tellico-4.2.1/src/translators/htmlexporter.cpp:185
#2 0x00005555556b7ab6 in Tellico::MainWindow::slotFileExport (this=0x555555bca3d0, format_=4)
at /usr/src/debug/tellico/tellico-4.2.1/src/mainwindow.cpp:1966
#3 0x00007fffe87f081b in QtPrivate::QSlotObjectBase::call (this=, r=, a=, this=,
r=, a=) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobjectdefs_impl.h:462
#4 doActivate (sender=0x555555ef8950, signal_index=3, argv=0x7fffffffc740) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobject.cpp:4372
#5 0x00007fffe87f7d25 in QMetaObject::activate<void, int> (sender=, mo=, local_signal_index=,
ret=, sender=, mo=, local_signal_index=, ret=)
at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobjectdefs.h:320
#6 QSignalMapper::mappedInt (this=, _t1=)
at /usr/src/debug/qt6-base/build/src/corelib/Core_autogen/include/moc_qsignalmapper.cpp:144
#7 QSignalMapperPrivate::emitMappedValue<void (QSignalMapper::*)(int), QHash<QObject*, int> > (this=0x555555d173f0, sender=0x555555f0cec0,
signal=, mappedValues=…) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qsignalmapper.cpp:25
#8 QSignalMapperPrivate::emitMappedValues (this=0x555555d173f0, sender=0x555555f0cec0)
at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qsignalmapper.cpp:30
#9 0x00007fffe87f081b in QtPrivate::QSlotObjectBase::call (this=, r=, a=, this=,
r=, a=) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobjectdefs_impl.h:462
#10 doActivate (sender=0x555555f0cec0, signal_index=7, argv=0x7fffffffc870) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobject.cpp:4372
#11 0x00007fffe965d7ae in QMetaObject::activate<void, bool> (sender=, mo=, local_signal_index=,
ret=, sender=, mo=, local_signal_index=, ret=)
at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobjectdefs.h:320
#12 QAction::triggered (this=, _t1=) at /usr/src/debug/qt6-base/build/src/gui/Gui_autogen/include/moc_qaction.cpp:374
#13 QAction::activate (this=0x555555f0cec0, event=) at /usr/src/debug/qt6-base/qtbase/src/gui/kernel/qaction.cpp:1106
#14 0x00007fffe9d2ba30 in QMenuPrivate::activateCausedStack (this=0x555556971070, causedStack=…, action=0x555555f0cec0, action_e=QAction::Trigger,
self=true) at /usr/src/debug/qt6-base/qtbase/src/widgets/widgets/qmenu.cpp:1413
#15 0x00007fffe9d2e45f in QMenuPrivate::activateAction (this=0x555556971070, action=0x555555f0cec0, action_e=QAction::Trigger, self=true)
at /usr/src/debug/qt6-base/qtbase/src/widgets/widgets/qmenu.cpp:1495
#16 0x00007fffe9b63e5e in QWidget::event (this=0x555557167d80, event=0x7fffffffcf90)
at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qwidget.cpp:9029
#17 0x00007fffe9b0411f in QApplicationPrivate::notify_helper (this=this@entry=0x555555aadbe0, receiver=receiver@entry=0x555557167d80,
e=e@entry=0x7fffffffcf90) at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qapplication.cpp:3276
–Type for more, q to quit, c to continue without paging–c
#18 0x00007fffe9b05bc6 in QApplication::notify (this=, receiver=, e=)
at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qapplication.cpp:2756
#19 0x00007fffe8783658 in QCoreApplication::notifyInternal2 (receiver=0x555557167d80, event=0x7fffffffcf90)
at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1114
#20 0x00007fffe87836ad in QCoreApplication::sendSpontaneousEvent (receiver=, event=)
at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1573
#21 0x00007fffe9afb4c6 in QApplicationPrivate::sendMouseEvent (receiver=0x555557167d80, event=0x7fffffffcf90, alienWidget=,
nativeWidget=0x555557167d80, buttonDown=0x7fffea1a1950 <qt_button_down>, lastMouseReceiver=…, spontaneous=true,
onlyDispatchEnterLeave=) at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qapplication.cpp:2355
#22 0x00007fffe9b86191 in QWidgetWindow::handleMouseEvent (this=0x5555568d21d0, event=0x7fffffffd3c0)
at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qwidgetwindow.cpp:578
#23 0x00007fffe9b8059b in QWidgetWindow::event (this=, event=0x7fffffffd3c0)
at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qwidgetwindow.cpp:293
#24 0x00007fffe9b0411f in QApplicationPrivate::notify_helper (this=, receiver=0x5555568d21d0, e=0x7fffffffd3c0)
at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qapplication.cpp:3276
#25 0x00007fffe8783658 in QCoreApplication::notifyInternal2 (receiver=0x5555568d21d0, event=0x7fffffffd3c0)
at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1114
#26 0x00007fffe87836ad in QCoreApplication::sendSpontaneousEvent (receiver=, event=)
at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1573
#27 0x00007fffe91b82c0 in QGuiApplicationPrivate::processMouseEvent (e=0x5555568f4800)
at /usr/src/debug/qt6-base/qtbase/src/gui/kernel/qguiapplication.cpp:2500
#28 0x00007fffe923384c in QWindowSystemInterface::sendWindowSystemEvents (flags=…)
at /usr/src/debug/qt6-base/qtbase/src/gui/kernel/qwindowsysteminterface.cpp:1117
#29 0x00007fffe9783524 in userEventSourceDispatch (source=)
at /usr/src/debug/qt6-base/qtbase/src/gui/platform/unix/qeventdispatcher_glib.cpp:39
#30 0x00007fffe62febfd in g_main_dispatch (context=0x7fffc8000f00) at ../glib/glib/gmain.c:3591
#31 0x00007fffe6300e57 in g_main_context_dispatch_unlocked (context=0x7fffc8000f00) at ../glib/glib/gmain.c:4451
#32 g_main_context_iterate_unlocked (context=context@entry=0x7fffc8000f00, block=block@entry=1, dispatch=dispatch@entry=1, self=)
at ../glib/glib/gmain.c:4516
#33 0x00007fffe6300fe5 in g_main_context_iteration (context=0x7fffc8000f00, may_block=1) at ../glib/glib/gmain.c:4582
#34 0x00007fffe8a9d0b2 in QEventDispatcherGlib::processEvents (this=0x555555a81b80, flags=…)
at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:402
#35 0x00007fffe8791983 in QEventLoop::processEvents (this=0x7fffffffd800, flags=…)
at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:109
#36 QEventLoop::exec (this=0x7fffffffd800, flags=…) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:198
#37 0x00007fffe8786eaa in QCoreApplication::exec () at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1457
#38 0x00007fffe9b0033a in QApplication::exec () at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qapplication.cpp:2546
#39 0x00005555555d8a52 in main (argc=, argv=) at /usr/src/debug/tellico/tellico-4.2.1/src/main.cpp:193