SUMMARY
Application: xdg-desktop-portal-kde (xdg-desktop-portal-kde), signal: Segmentation fault

STEPS TO REPRODUCE
1. browsing KDE file picker window to attach an image file in Firefox 96.0
2. going to the directory above (maybe related)

SOFTWARE/OS VERSIONS
Linux: Kubuntu 21.10
KDE Plasma Version: 5.23.5
KDE Frameworks Version: 5.90.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION
[KCrash Handler]
#4  __memmove_avx_unaligned_erms () at ../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:502
#5  0x00007f0c059fbb9e in memmove (__len=<optimized out>, __src=<optimized out>, __dest=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/string_fortified.h:36
#6  QVector<int>::erase (aend=<optimized out>, abegin=<optimized out>, this=0x561a15e8ac00) at ../../include/QtCore/../../src/corelib/tools/qvector.h:942
#7  QVector<int>::remove (n=78, i=<optimized out>, this=0x561a15e8ac00) at ../../include/QtCore/../../src/corelib/tools/qvector.h:479
#8  QSortFilterProxyModelPrivate::remove_proxy_interval (emit_signal=true, orient=Qt::Vertical, proxy_parent=..., proxy_end=<optimized out>, proxy_start=<optimized out>, proxy_to_source=..., source_to_proxy=..., this=0x561a15be33d0) at itemmodels/qsortfilterproxymodel.cpp:790
#9  QSortFilterProxyModelPrivate::remove_source_items (this=0x561a15be33d0, source_to_proxy=..., proxy_to_source=..., source_items=..., source_parent=..., orient=Qt::Vertical, emit_signal=true) at itemmodels/qsortfilterproxymodel.cpp:765
#10 0x00007f0c059fbd99 in QSortFilterProxyModelPrivate::source_items_about_to_be_removed (this=0x561a15be33d0, source_parent=..., start=0, end=77, orient=Qt::Vertical) at itemmodels/qsortfilterproxymodel.cpp:1066
#11 0x00007f0c05a60a88 in doActivate<false> (sender=0x561a13967600, signal_index=14, argv=0x7ffd3e568170) at kernel/qobject.cpp:3898
#12 0x00007f0c05a59d67 in QMetaObject::activate (sender=sender@entry=0x561a13967600, m=m@entry=0x7f0c05cc4660 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7ffd3e568170) at kernel/qobject.cpp:3946
#13 0x00007f0c059c21b2 in QAbstractItemModel::rowsAboutToBeRemoved (this=this@entry=0x561a13967600, _t1=..., _t2=<optimized out>, _t2@entry=0, _t3=<optimized out>, _t3@entry=77, _t4=...) at .moc/moc_qabstractitemmodel.cpp:599
#14 0x00007f0c059ca136 in QAbstractItemModel::beginRemoveRows (this=0x561a13967600, parent=..., first=0, last=77) at itemmodels/qabstractitemmodel.cpp:2818
#15 0x00007f0c07c0d3e6 in KDirModelPrivate::_k_slotClear (this=0x561a15df9390) at ./src/widgets/kdirmodel.cpp:737
#16 0x00007f0c05a60a53 in QtPrivate::QSlotObjectBase::call (a=0x7ffd3e5682f0, r=0x561a13967600, this=0x561a141c1390) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#17 doActivate<false> (sender=0x561a14635830, signal_index=12, argv=0x7ffd3e5682f0) at kernel/qobject.cpp:3886
#18 0x00007f0c05a59d67 in QMetaObject::activate (sender=sender@entry=0x561a14635830, m=m@entry=0x7f0c060d5c20 <KCoreDirLister::staticMetaObject>, local_signal_index=local_signal_index@entry=9, argv=argv@entry=0x0) at kernel/qobject.cpp:3946
#19 0x00007f0c0604c577 in KCoreDirLister::clear (this=this@entry=0x561a14635830) at ./obj-x86_64-linux-gnu/src/core/KF5KIOCore_autogen/include/moc_kcoredirlister.cpp:533
#20 0x00007f0c0605f9ee in KCoreDirListerCache::forgetDirs (this=this@entry=0x7f0c060d9540 <(anonymous namespace)::Q_QGS_kDirListerCache::innerFunction()::holder>, lister=lister@entry=0x561a14635830) at ./src/core/kcoredirlister.cpp:469
#21 0x00007f0c06060d5d in KCoreDirListerCache::listDir (this=0x7f0c060d9540 <(anonymous namespace)::Q_QGS_kDirListerCache::innerFunction()::holder>, lister=<optimized out>, dirUrl=..., _keep=<optimized out>, _reload=<optimized out>) at ./src/core/kcoredirlister.cpp:124
#22 0x00007f0c07cabdaf in KDirOperatorPrivate::openUrl (this=0x561a16ef0ee0, url=..., flags=flags@entry=...) at ./src/filewidgets/kdiroperator.cpp:1077
#23 0x00007f0c07cb7094 in KDirOperator::setUrl (this=this@entry=0x561a161d6f00, _newurl=..., clearforward=clearforward@entry=true) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qflags.h:121
#24 0x00007f0c07caae17 in KDirOperator::cdUp (this=0x561a161d6f00) at ./src/filewidgets/kdiroperator.cpp:1240
#25 0x00007f0c05a60a88 in doActivate<false> (sender=0x561a15c5e150, signal_index=4, argv=0x7ffd3e5686e0) at kernel/qobject.cpp:3898
#26 0x00007f0c05a59d67 in QMetaObject::activate (sender=sender@entry=0x561a15c5e150, m=m@entry=0x7f0c07847d40 <QAction::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffd3e5686e0) at kernel/qobject.cpp:3946
#27 0x00007f0c0731cb86 in QAction::triggered (this=this@entry=0x561a15c5e150, _t1=<optimized out>) at .moc/moc_qaction.cpp:376
#28 0x00007f0c0731f89c in QAction::activate (this=0x561a15c5e150, event=<optimized out>) at kernel/qaction.cpp:1161
#29 0x00007f0c0741a7ba in QAbstractButtonPrivate::click (this=0x561a160fe080) at widgets/qabstractbutton.cpp:398
#30 0x00007f0c0741a917 in QAbstractButton::mouseReleaseEvent (this=0x561a14bb7450, e=0x7ffd3e568c80) at widgets/qabstractbutton.cpp:1044
#31 0x00007f0c07516f3e in QToolButton::mouseReleaseEvent (this=<optimized out>, e=<optimized out>) at widgets/qtoolbutton.cpp:622
#32 0x00007f0c0736617e in QWidget::event (this=0x561a14bb7450, event=0x7ffd3e568c80) at kernel/qwidget.cpp:9019
#33 0x00007f0c073236b3 in QApplicationPrivate::notify_helper (this=this@entry=0x561a133f0360, receiver=receiver@entry=0x561a14bb7450, e=e@entry=0x7ffd3e568c80) at kernel/qapplication.cpp:3632
#34 0x00007f0c0732b2e4 in QApplication::notify (this=0x7ffd3e5689a0, receiver=0x561a14bb7450, e=0x7ffd3e568c80) at kernel/qapplication.cpp:3076
#35 0x00007f0c05a2916a in QCoreApplication::notifyInternal2 (receiver=0x561a14bb7450, event=0x7ffd3e568c80) at kernel/qcoreapplication.cpp:1063
#36 0x00007f0c07329dc7 in QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x561a14bb7450, event=event@entry=0x7ffd3e568c80, alienWidget=alienWidget@entry=0x561a14bb7450, nativeWidget=0x561a169454f0, buttonDown=<optimized out>, lastMouseReceiver=..., spontaneous=true, onlyDispatchEnterLeave=false) at kernel/qapplication.cpp:2614
#37 0x00007f0c0737f9b0 in QWidgetWindow::handleMouseEvent (this=0x561a166286c0, event=0x7ffd3e568f50) at kernel/qwidgetwindow.cpp:683
#38 0x00007f0c07382c45 in QWidgetWindow::event (this=0x561a166286c0, event=0x7ffd3e568f50) at kernel/qwidgetwindow.cpp:300
#39 0x00007f0c073236b3 in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x561a166286c0, e=0x7ffd3e568f50) at kernel/qapplication.cpp:3632
#40 0x00007f0c05a2916a in QCoreApplication::notifyInternal2 (receiver=0x561a166286c0, event=0x7ffd3e568f50) at kernel/qcoreapplication.cpp:1063
#41 0x00007f0c066a4257 in QGuiApplicationPrivate::processMouseEvent (e=0x561a16dcfdb0) at kernel/qguiapplication.cpp:2282
#42 0x00007f0c066799bc in QWindowSystemInterface::sendWindowSystemEvents (flags=flags@entry=...) at kernel/qwindowsysteminterface.cpp:1169
#43 0x00007f0c00c7ab9e in xcbSourceDispatch (source=<optimized out>) at ./src/plugins/platforms/xcb/qxcbeventdispatcher.cpp:105
#44 0x00007f0c03ffc8bb in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#45 0x00007f0c0404ff08 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#46 0x00007f0c03ffa003 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#47 0x00007f0c05a82548 in QEventDispatcherGlib::processEvents (this=0x561a134c1f80, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#48 0x00007f0c05a27a9b in QEventLoop::exec (this=this@entry=0x7ffd3e569280, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:69
#49 0x00007f0c07533642 in QDialog::exec (this=0x561a169454f0) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#50 0x0000561a11837adc in FileChooserPortal::SaveFile(QDBusObjectPath const&, QString const&, QString const&, QString const&, QMap<QString, QVariant> const&, QMap<QString, QVariant>&) [clone .constprop.0] (this=this@entry=0x561a134dc5e0, handle=..., parent_window=..., title=..., options=..., results=..., app_id=...) at ./src/filechooser.cpp:461
#51 0x0000561a117ffec3 in FileChooserPortal::qt_static_metacall (_o=_o@entry=0x561a134dc5e0, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=1, _a=_a@entry=0x7ffd3e569580) at ./obj-x86_64-linux-gnu/src/xdg-desktop-portal-kde_autogen/EWIEGA46WW/moc_filechooser.cpp:164
#52 0x0000561a11807c93 in FileChooserPortal::qt_metacall (this=0x561a134dc5e0, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7ffd3e569580) at ./obj-x86_64-linux-gnu/src/xdg-desktop-portal-kde_autogen/EWIEGA46WW/moc_filechooser.cpp:219
#53 0x00007f0c05cf256b in QDBusConnectionPrivate::deliverCall (this=<optimized out>, object=<optimized out>, msg=..., metaTypes=..., slotIdx=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qvarlengtharray.h:201
#54 0x00007f0c05cf6257 in QDBusConnectionPrivate::activateCall (this=this@entry=0x7f0bf4003a00, object=0x561a134dc5e0, flags=flags@entry=273, msg=...) at ./src/dbus/qdbusintegrator.cpp:911
#55 0x00007f0c05cf6999 in QDBusConnectionPrivate::activateCall (msg=..., flags=273, object=<optimized out>, this=0x7f0bf4003a00) at ./src/dbus/qdbusintegrator.cpp:853
#56 QDBusConnectionPrivate::activateObject (this=0x7f0bf4003a00, node=..., msg=..., pathStartPos=<optimized out>) at ./src/dbus/qdbusintegrator.cpp:1497
#57 0x00007f0c05cf8d4c in QDBusActivateObjectEvent::placeMetaCall (this=0x561a164231b0) at ./src/dbus/qdbusintegrator.cpp:1617
#58 0x00007f0c05a5673e in QObject::event (this=0x561a134f41e0, e=0x561a164231b0) at kernel/qobject.cpp:1314
#59 0x00007f0c073236b3 in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x561a134f41e0, e=0x561a164231b0) at kernel/qapplication.cpp:3632
#60 0x00007f0c05a2916a in QCoreApplication::notifyInternal2 (receiver=0x561a134f41e0, event=0x561a164231b0) at kernel/qcoreapplication.cpp:1063
#61 0x00007f0c05a2c257 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x561a133d24b0) at kernel/qcoreapplication.cpp:1817
#62 0x00007f0c05a82ef7 in postEventSourceDispatch (s=0x561a134ad6c0) at kernel/qeventdispatcher_glib.cpp:277
#63 0x00007f0c03ffc8bb in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#64 0x00007f0c0404ff08 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#65 0x00007f0c03ffa003 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#66 0x00007f0c05a82548 in QEventDispatcherGlib::processEvents (this=0x561a134c1f80, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#67 0x00007f0c05a27a9b in QEventLoop::exec (this=this@entry=0x7ffd3e569b60, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:69
#68 0x00007f0c05a30024 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#69 0x00007f0c06697d10 in QGuiApplication::exec () at kernel/qguiapplication.cpp:1867
#70 0x00007f0c07323629 in QApplication::exec () at kernel/qapplication.cpp:2824
#71 0x0000561a117fdf39 in main (argc=<optimized out>, argv=<optimized out>) at ./src/xdg-desktop-portal-kde.cpp:39
[Inferior 1 (process 7623) detached]