Bug 407451

Summary: System Settings crashes when opening something related to appearance
Product: [Applications] systemsettings Reporter: Robin <robin.lahtinen>
Component: generalAssignee: Plasma Bugs List <plasma-bugs>
Status: RESOLVED DUPLICATE    
Severity: major CC: mail
Priority: NOR    
Version: 5.15.5   
Target Milestone: ---   
Platform: Neon   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Robin 2019-05-12 09:47:08 UTC 
System Settings crashes when opening something related to desktop appearance, like Look and Feel, Workspace Theme, Colors and Icons.


Steps to reproduce:
1. Open System Settings
2. Click on "Look and Feel" section
3. Crash

Observed result:
System Settings crashes.

EXPECTED RESULT
Section opens without a crash.

Operating System: KDE neon Unstable Edition
KDE Plasma Version: 5.15.80
KDE Frameworks Version: 5.58.0
Qt Version: 5.12.0
Kernel Version: 5.1.1-050101-generic
OS Type: 64-bit
Processors: 8 × Intel® Core™ i7-6700 CPU @ 3.40GHz
Memory: 22,5 GiB of RAM 


Crash information:

Application: System Settings (systemsettings5), signal: Floating point exception
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7efec2707680 (LWP 21688))]

Thread 7 (Thread 0x7efe82a87700 (LWP 21698)):
#0  0x00007efebdc82bf9 in __GI___poll (fds=0x7efe7c004e00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007efeb6ceb5c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efeb6ceb6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efebe5c515b in QEventDispatcherGlib::processEvents (this=0x7efe7c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007efebe56664a in QEventLoop::exec (this=this@entry=0x7efe82a86d40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007efebe38e41a in QThread::exec (this=this@entry=0x555ea0f27950) at thread/qthread.cpp:531
#6  0x00007efebc1492e5 in QQmlThreadPrivate::run (this=0x555ea0f27950) at qml/ftw/qqmlthread.cpp:148
#7  0x00007efebe38fbc2 in QThreadPrivate::start (arg=0x555ea0f27950) at thread/qthread_unix.cpp:361
#8  0x00007efeb90aa6db in start_thread (arg=0x7efe82a87700) at pthread_create.c:463
#9  0x00007efebdc8f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7efe8a6bc700 (LWP 21695)):
#0  0x00007efebdc82bf9 in __GI___poll (fds=0x7efe84003ce0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007efeb6ceb5c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efeb6ceb6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efebe5c515b in QEventDispatcherGlib::processEvents (this=0x7efe84000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007efebe56664a in QEventLoop::exec (this=this@entry=0x7efe8a6bbd40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007efebe38e41a in QThread::exec (this=this@entry=0x555e9b2a9b00) at thread/qthread.cpp:531
#6  0x00007efebc1492e5 in QQmlThreadPrivate::run (this=0x555e9b2a9b00) at qml/ftw/qqmlthread.cpp:148
#7  0x00007efebe38fbc2 in QThreadPrivate::start (arg=0x555e9b2a9b00) at thread/qthread_unix.cpp:361
#8  0x00007efeb90aa6db in start_thread (arg=0x7efe8a6bc700) at pthread_create.c:463
#9  0x00007efebdc8f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7efe93463700 (LWP 21694)):
#0  0x00007efebdc82bf9 in __GI___poll (fds=0x7efe8c004a00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007efeb6ceb5c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efeb6ceb6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efebe5c515b in QEventDispatcherGlib::processEvents (this=0x7efe8c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007efebe56664a in QEventLoop::exec (this=this@entry=0x7efe93462d40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007efebe38e41a in QThread::exec (this=this@entry=0x555e9af65470) at thread/qthread.cpp:531
#6  0x00007efebc1492e5 in QQmlThreadPrivate::run (this=0x555e9af65470) at qml/ftw/qqmlthread.cpp:148
#7  0x00007efebe38fbc2 in QThreadPrivate::start (arg=0x555e9af65470) at thread/qthread_unix.cpp:361
#8  0x00007efeb90aa6db in start_thread (arg=0x7efe93463700) at pthread_create.c:463
#9  0x00007efebdc8f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7efe9f7bd700 (LWP 21692)):
#0  0x00007efeb90b09f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x555e9ab3b0cc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x555e9ab3b078, cond=0x555e9ab3b0a0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x555e9ab3b0a0, mutex=0x555e9ab3b078) at pthread_cond_wait.c:655
#3  0x00007efea4d5770b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007efea4d523a7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007efeb90aa6db in start_thread (arg=0x7efe9f7bd700) at pthread_create.c:463
#6  0x00007efebdc8f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7efea7fff700 (LWP 21691)):
#0  0x00007efebdc7e0b4 in __GI___libc_read (fd=7, buf=0x7efea7ffeb20, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007efeb6d302d0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efeb6ceb0b7 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efeb6ceb570 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007efeb6ceb6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007efebe5c515b in QEventDispatcherGlib::processEvents (this=0x7efea0000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007efebe56664a in QEventLoop::exec (this=this@entry=0x7efea7ffed30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#7  0x00007efebe38e41a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#8  0x00007efebea33015 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007efebe38fbc2 in QThreadPrivate::start (arg=0x7efebecaad80) at thread/qthread_unix.cpp:361
#10 0x00007efeb90aa6db in start_thread (arg=0x7efea7fff700) at pthread_create.c:463
#11 0x00007efebdc8f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7efeb05c8700 (LWP 21690)):
#0  0x00007efebdc82bf9 in __GI___poll (fds=0x7efeb05c7c78, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007efeb8c6e747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007efeb8c7036a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007efeb151932a in QXcbEventQueue::run (this=0x555e9aae0690) at qxcbeventqueue.cpp:225
#4  0x00007efebe38fbc2 in QThreadPrivate::start (arg=0x555e9aae0690) at thread/qthread_unix.cpp:361
#5  0x00007efeb90aa6db in start_thread (arg=0x7efeb05c8700) at pthread_create.c:463
#6  0x00007efebdc8f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7efec2707680 (LWP 21688)):
[KCrash Handler]
#6  0x00007efebf664e19 in QCommonStyle::subControlRect (this=this@entry=0x555e9ab2d040, cc=cc@entry=QStyle::CC_ScrollBar, opt=opt@entry=0x7ffd0b6f6840, sc=QStyle::SC_ScrollBarFirst, widget=widget@entry=0x0) at styles/qcommonstyle.cpp:4036
#7  0x00007efeacb5a571 in Breeze::Style::scrollBarSubControlRect (this=0x555e9ab2d040, option=0x7ffd0b6f6840, subControl=<optimized out>, widget=0x0) at ./kstyle/breezestyle.cpp:2433
#8  0x00007efebf675e02 in QCommonStyle::drawComplexControl (this=this@entry=0x555e9ab2d040, cc=cc@entry=QStyle::CC_ScrollBar, opt=opt@entry=0x555ea2126ee0, p=p@entry=0x7ffd0b6f6bb0, widget=widget@entry=0x0) at styles/qcommonstyle.cpp:3272
#9  0x00007efeacb5c371 in Breeze::Style::drawScrollBarComplexControl (this=0x555e9ab2d040, option=0x555ea2126ee0, painter=0x7ffd0b6f6bb0, widget=0x0) at ./kstyle/breezestyle.cpp:6589
#10 0x00007efeacb5bf94 in std::function<bool (Breeze::Style const&, QStyleOptionComplex const*, QPainter*, QWidget const*)>::operator()(Breeze::Style const&, QStyleOptionComplex const*, QPainter*, QWidget const*) const (__args#3=<optimized out>, __args#2=<optimized out>, __args#1=<optimized out>, __args#0=..., this=0x7ffd0b6f6a50) at /usr/include/c++/7/bits/std_function.h:706
#11 Breeze::Style::drawComplexControl (this=0x555e9ab2d040, element=QStyle::CC_ScrollBar, option=0x555ea2126ee0, painter=0x7ffd0b6f6bb0, widget=0x0) at ./kstyle/breezestyle.cpp:979
#12 0x00007efe8b909dee in KQuickStyleItem::paint (this=this@entry=0x555ea2118e20, painter=painter@entry=0x7ffd0b6f6bb0) at ./plugin/kquickstyleitem.cpp:1557
#13 0x00007efe8b90a7cc in KQuickStyleItem::updatePolish (this=0x555ea2118e20) at ./plugin/kquickstyleitem.cpp:1720
#14 0x00007efebc6e7e83 in QQuickWindowPrivate::polishItems (this=0x555e9f85ff60) at items/qquickwindow.cpp:310
#15 0x00007efebc7a98d4 in QQuickRenderControl::polishItems (this=<optimized out>) at items/qquickrendercontrol.cpp:266
#16 0x00007efebcd91fb5 in QQuickWidgetPrivate::render (this=this@entry=0x555ea0f10fd0, needsSync=<optimized out>) at qquickwidget.cpp:284
#17 0x00007efebcd94e2b in QQuickWidget::resizeEvent (this=0x555ea0f554f0, e=<optimized out>) at qquickwidget.cpp:1227
#18 0x00007efebf62e452 in QWidget::event (this=this@entry=0x555ea0f554f0, event=event@entry=0x7ffd0b6f7130) at kernel/qwidget.cpp:9052
#19 0x00007efebcd95dbb in QQuickWidget::event (this=0x555ea0f554f0, e=0x7ffd0b6f7130) at qquickwidget.cpp:1525
#20 0x00007efebf5ed8ac in QApplicationPrivate::notify_helper (this=this@entry=0x555e9aad9900, receiver=receiver@entry=0x555ea0f554f0, e=e@entry=0x7ffd0b6f7130) at kernel/qapplication.cpp:3752
#21 0x00007efebf5f4e40 in QApplication::notify (this=0x7ffd0b6fc0c0, receiver=0x555ea0f554f0, e=0x7ffd0b6f7130) at kernel/qapplication.cpp:3499
#22 0x00007efebe568328 in QCoreApplication::notifyInternal2 (receiver=0x555ea0f554f0, event=0x7ffd0b6f7130) at kernel/qcoreapplication.cpp:1061
#23 0x00007efebe5684fe in QCoreApplication::sendEvent (receiver=receiver@entry=0x555ea0f554f0, event=event@entry=0x7ffd0b6f7130) at kernel/qcoreapplication.cpp:1451
#24 0x00007efebf6263e6 in QWidgetPrivate::sendPendingMoveAndResizeEvents (this=this@entry=0x555ea0f10fd0, recursive=recursive@entry=false, disableUpdates=<optimized out>, disableUpdates@entry=false) at kernel/qwidget.cpp:7916
#25 0x00007efebf62a2e3 in QWidgetPrivate::show_helper (this=this@entry=0x555ea0f10fd0) at kernel/qwidget.cpp:7967
#26 0x00007efebf62d45b in QWidget::setVisible (this=0x555ea0f554f0, visible=<optimized out>) at kernel/qwidget.cpp:8322
#27 0x00007efebf62a250 in QWidgetPrivate::showChildren (this=this@entry=0x555ea0e8bfb0, spontaneous=spontaneous@entry=false) at kernel/qwidget.cpp:8405
#28 0x00007efebf62a2ff in QWidgetPrivate::show_helper (this=this@entry=0x555ea0e8bfb0) at kernel/qwidget.cpp:7973
#29 0x00007efebf62d45b in QWidget::setVisible (this=0x555ea0f16210, visible=<optimized out>) at kernel/qwidget.cpp:8322
#30 0x00007efebf62a250 in QWidgetPrivate::showChildren (this=this@entry=0x555ea0e8bde0, spontaneous=spontaneous@entry=false) at kernel/qwidget.cpp:8405
#31 0x00007efebf62a2ff in QWidgetPrivate::show_helper (this=0x555ea0e8bde0) at kernel/qwidget.cpp:7973
#32 0x00007efebf62a151 in QWidgetPrivate::show_recursive (this=<optimized out>) at kernel/qwidget.cpp:7897
#33 0x00007efebf62a1fe in QWidgetPrivate::showChildren (this=this@entry=0x555ea0e8a6b0, spontaneous=spontaneous@entry=false) at kernel/qwidget.cpp:8403
#34 0x00007efebf62a2ff in QWidgetPrivate::show_helper (this=this@entry=0x555ea0e8a6b0) at kernel/qwidget.cpp:7973
#35 0x00007efebf62d45b in QWidget::setVisible (this=0x555ea0efdd20, visible=<optimized out>) at kernel/qwidget.cpp:8322
#36 0x00007efebf62a250 in QWidgetPrivate::showChildren (this=this@entry=0x555e9e1f4e20, spontaneous=spontaneous@entry=false) at kernel/qwidget.cpp:8405
#37 0x00007efebf62a2ff in QWidgetPrivate::show_helper (this=0x555e9e1f4e20) at kernel/qwidget.cpp:7973
#38 0x00007efebf62a151 in QWidgetPrivate::show_recursive (this=<optimized out>) at kernel/qwidget.cpp:7897
#39 0x00007efebf62a1fe in QWidgetPrivate::showChildren (this=this@entry=0x555e9aef4500, spontaneous=spontaneous@entry=false) at kernel/qwidget.cpp:8403
#40 0x00007efebf62a2ff in QWidgetPrivate::show_helper (this=0x555e9aef4500) at kernel/qwidget.cpp:7973
#41 0x00007efebf62a151 in QWidgetPrivate::show_recursive (this=<optimized out>) at kernel/qwidget.cpp:7897
#42 0x00007efebf62a1fe in QWidgetPrivate::showChildren (this=this@entry=0x555e9af226b0, spontaneous=spontaneous@entry=false) at kernel/qwidget.cpp:8403
#43 0x00007efebf62a2ff in QWidgetPrivate::show_helper (this=this@entry=0x555e9af226b0) at kernel/qwidget.cpp:7973
#44 0x00007efebf62d45b in QWidget::setVisible (this=0x555e9af19f80, visible=<optimized out>) at kernel/qwidget.cpp:8322
#45 0x00007efebf62a250 in QWidgetPrivate::showChildren (this=this@entry=0x555e9af19bb0, spontaneous=spontaneous@entry=false) at kernel/qwidget.cpp:8405
#46 0x00007efebf62a2ff in QWidgetPrivate::show_helper (this=this@entry=0x555e9af19bb0) at kernel/qwidget.cpp:7973
#47 0x00007efebf62d45b in QWidget::setVisible (this=0x555e9af19b70, visible=<optimized out>) at kernel/qwidget.cpp:8322
#48 0x00007efebe597f3f in QtPrivate::QSlotObjectBase::call (a=0x7ffd0b6f7ad0, r=0x555e9aefcdf0, this=0x555e9af3fc60) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:394
#49 QMetaObject::activate (sender=sender@entry=0x555e9af19b70, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd0b6f7ad0) at kernel/qobject.cpp:3759
#50 0x00007efebe5984f7 in QMetaObject::activate (sender=sender@entry=0x555e9af19b70, m=m@entry=0x7efec2530ae0 <ModuleView::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd0b6f7ad0) at kernel/qobject.cpp:3631
#51 0x00007efec232c27f in ModuleView::moduleChanged (this=this@entry=0x555e9af19b70, _t1=<optimized out>, _t1@entry=false) at ./obj-x86_64-linux-gnu/core/systemsettingsview_autogen/EWIEGA46WW/moc_ModuleView.cpp:196
#52 0x00007efec23297f1 in ModuleView::stateChanged (this=this@entry=0x555e9af19b70) at ./core/ModuleView.cpp:392
#53 0x00007efec2329968 in ModuleView::activeModuleChanged (this=0x555e9af19b70, current=0x555ea0ee6b40, previous=0x0) at ./core/ModuleView.cpp:346
#54 0x00007efebe597e25 in QMetaObject::activate (sender=0x555e9af19f80, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd0b6f7cf0) at kernel/qobject.cpp:3778
#55 0x00007efebe5984f7 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7efec0e86fa0 <KPageWidget::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd0b6f7cf0) at kernel/qobject.cpp:3631
#56 0x00007efec0c2f2db in KPageWidget::currentPageChanged (this=<optimized out>, _t1=<optimized out>, _t2=<optimized out>) at ./obj-x86_64-linux-gnu/src/KF5WidgetsAddons_autogen/include/moc_kpagewidget.cpp:195
#57 0x00007efec0c2f444 in KPageWidgetPrivate::_k_slotCurrentPageChanged (this=<optimized out>, current=..., before=...) at ./src/kpagewidget.cpp:45
#58 0x00007efec0c2f49c in KPageWidget::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./obj-x86_64-linux-gnu/src/KF5WidgetsAddons_autogen/include/moc_kpagewidget.cpp:96
#59 0x00007efebe597e25 in QMetaObject::activate (sender=0x555e9af19f80, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd0b6f7e60) at kernel/qobject.cpp:3778
#60 0x00007efebe5984f7 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7efec0e86d40 <KPageView::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd0b6f7e60) at kernel/qobject.cpp:3631
#61 0x00007efec0c29a87 in KPageView::currentPageChanged (this=<optimized out>, _t1=..., _t2=...) at ./obj-x86_64-linux-gnu/src/KF5WidgetsAddons_autogen/include/moc_kpageview.cpp:215
#62 0x00007efec0c2aec9 in KPageViewPrivate::_k_pageSelected (this=0x555e9af19fc0, index=..., previous=...) at ./src/kpageview.cpp:256
#63 0x00007efebe597e25 in QMetaObject::activate (sender=sender@entry=0x555e9af3f6b0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd0b6f8030) at kernel/qobject.cpp:3778
#64 0x00007efebe5984f7 in QMetaObject::activate (sender=sender@entry=0x555e9af3f6b0, m=m@entry=0x7efebea136a0 <QItemSelectionModel::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd0b6f8030) at kernel/qobject.cpp:3631
#65 0x00007efebe51ddf7 in QItemSelectionModel::selectionChanged (this=this@entry=0x555e9af3f6b0, _t1=..., _t2=...) at .moc/moc_qitemselectionmodel.cpp:458
#66 0x00007efebe522960 in QItemSelectionModel::emitSelectionChanged (this=this@entry=0x555e9af3f6b0, newSelection=..., oldSelection=...) at itemmodels/qitemselectionmodel.cpp:1871
#67 0x00007efebe525eab in QItemSelectionModel::select (this=0x555e9af3f6b0, selection=..., command=...) at itemmodels/qitemselectionmodel.cpp:1338
#68 0x00007efebe51fe5c in QItemSelectionModel::select (this=this@entry=0x555e9af3f6b0, index=..., command=command@entry=...) at itemmodels/qitemselectionmodel.cpp:1188
#69 0x00007efebe51e1a4 in QItemSelectionModel::setCurrentIndex (this=this@entry=0x555e9af3f6b0, index=..., command=command@entry=...) at itemmodels/qitemselectionmodel.cpp:1413
#70 0x00007efec0c29f3a in KPageViewPrivate::updateSelection (this=<optimized out>) at ./src/kpageview.cpp:111
#71 0x00007efec0c2ace5 in KPageViewPrivate::_k_modelChanged (this=0x555e9af19fc0) at ./src/kpageview.cpp:218
#72 0x00007efebe597e25 in QMetaObject::activate (sender=sender@entry=0x555e9af291f0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7ffd0b6f8490) at kernel/qobject.cpp:3778
#73 0x00007efebe5984f7 in QMetaObject::activate (sender=sender@entry=0x555e9af291f0, m=m@entry=0x7efebea135a0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7ffd0b6f8490) at kernel/qobject.cpp:3631
#74 0x00007efebe50fa66 in QAbstractItemModel::layoutChanged (this=this@entry=0x555e9af291f0, _t1=..., _t2=<optimized out>, _t2@entry=QAbstractItemModel::NoLayoutChangeHint) at .moc/moc_qabstractitemmodel.cpp:570
#75 0x00007efec0c31106 in KPageWidgetModel::addPage (this=0x555e9af291f0, item=item@entry=0x555ea0ee6b40) at ./src/kpagewidgetmodel.cpp:440
#76 0x00007efec0c2fafd in KPageWidget::addPage (this=<optimized out>, item=item@entry=0x555ea0ee6b40) at ./src/kpagewidget.cpp:94
#77 0x00007efec232a166 in ModuleView::addModule (this=this@entry=0x555e9af19b70, module=0x555e9aec86d8) at ./core/ModuleView.cpp:198
#78 0x00007efec232a4ed in ModuleView::loadModule (this=0x555e9af19b70, menuItem=...) at ./core/ModuleView.cpp:151
#79 0x00007efe96608fbe in SidebarMode::changeModule (this=this@entry=0x555e9aefcdf0, activeModule=...) at ./sidebar/SidebarMode.cpp:405
#80 0x00007efe966090a6 in SidebarMode::setActiveCategory (this=0x555e9aefcdf0, cat=<optimized out>) at ./sidebar/SidebarMode.cpp:439
#81 0x00007efe9660db87 in SidebarMode::qt_static_metacall (_o=_o@entry=0x555e9aefcdf0, _c=_c@entry=QMetaObject::WriteProperty, _id=_id@entry=3, _a=_a@entry=0x7ffd0b6f8870) at ./obj-x86_64-linux-gnu/sidebar/systemsettings_sidebar_mode_autogen/EWIEGA46WW/moc_SidebarMode.cpp:312
#82 0x00007efe9660ddc3 in SidebarMode::qt_metacall (this=0x555e9aefcdf0, _c=QMetaObject::WriteProperty, _id=3, _a=0x7ffd0b6f8870) at ./obj-x86_64-linux-gnu/sidebar/systemsettings_sidebar_mode_autogen/EWIEGA46WW/moc_SidebarMode.cpp:361
#83 0x00007efebbff42cb in QV4::QObjectWrapper::setProperty (engine=engine@entry=0x555e9af69730, object=object@entry=0x555e9aefcdf0, property=0x555e9b0f4cf8, value=...) at jsruntime/qv4qobjectwrapper.cpp:534
#84 0x00007efebbff4d6e in QV4::QObjectWrapper::setQmlProperty (engine=0x555e9af69730, qmlContext=<optimized out>, object=0x555e9aefcdf0, name=<optimized out>, revisionMode=QV4::QObjectWrapper::IgnoreRevision, value=...) at jsruntime/qv4qobjectwrapper.cpp:435
#85 0x00007efebbff4f09 in QV4::QObjectWrapper::virtualPut (m=0x7efe92824590, id=..., value=..., receiver=0x7efe92824590) at jsruntime/qv4qobjectwrapper.cpp:721
#86 0x00007efebc071bf1 in QV4::Object::put (receiver=<optimized out>, v=..., name=0x7efe92824588, this=0x7efe92824590) at jsruntime/qv4object_p.h:318
#87 QV4::Runtime::method_storeProperty (engine=0x555e9af69730, object=..., nameIndex=<optimized out>, value=...) at jsruntime/qv4runtime.cpp:611
#88 0x00007efebc00c93e in QV4::Moth::VME::interpret (frame=0x7ffd0b6f8bc0, engine=0x555e9af69730, code=0x7efe9c18a369 "+\243") at jsruntime/qv4vme_moth.cpp:604
#89 0x00007efebc010746 in QV4::Moth::VME::exec (frame=frame@entry=0x7ffd0b6f8bc0, engine=engine@entry=0x555e9af69730) at jsruntime/qv4vme_moth.cpp:441
#90 0x00007efebbfa391b in QV4::Function::call (this=this@entry=0x555e9afbcf50, thisObject=thisObject@entry=0x7efe928244e8, argv=argv@entry=0x7efe92824500, argc=<optimized out>, context=<optimized out>) at jsruntime/qv4function.cpp:68
#91 0x00007efebc117737 in QQmlJavaScriptExpression::evaluate (this=this@entry=0x555e9b267b50, callData=callData@entry=0x7efe928244d0, isUndefined=isUndefined@entry=0x0) at qml/qqmljavascriptexpression.cpp:216
#92 0x00007efebc0b7289 in QQmlBoundSignalExpression::evaluate (this=this@entry=0x555e9b267b50, a=a@entry=0x0) at qml/qqmlboundsignal.cpp:225
#93 0x00007efebc0b860b in QQmlBoundSignal_callback (e=0x555e9b268480, a=0x0) at qml/qqmlboundsignal.cpp:358
#94 0x00007efebc0f8cc3 in QQmlNotifier::emitNotify (endpoint=<optimized out>, a=a@entry=0x0) at qml/qqmlnotifier.cpp:106
#95 0x00007efebc099329 in QQmlData::signalEmitted (object=0x555e9b242f60, index=<optimized out>, a=0x0) at qml/qqmlengine.cpp:880
#96 0x00007efebe59765f in QMetaObject::activate (sender=0x555e9b242f60, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3647
#97 0x00007efeaea26f18 in QQuickAbstractButtonPrivate::handleRelease (this=0x555e9ace7c30, point=...) at qquickabstractbutton.cpp:179
#98 0x00007efeaea440e5 in QQuickControl::mouseReleaseEvent (this=<optimized out>, event=0x7ffd0b6fb160) at qquickcontrol.cpp:2099
#99 0x00007efebc6d5c78 in QQuickItem::event (this=0x555e9b242f60, ev=0x7ffd0b6fb160) at items/qquickitem.cpp:8096
#100 0x00007efebf5ed8ac in QApplicationPrivate::notify_helper (this=this@entry=0x555e9aad9900, receiver=receiver@entry=0x555e9b242f60, e=e@entry=0x7ffd0b6fb160) at kernel/qapplication.cpp:3752
#101 0x00007efebf5f4e40 in QApplication::notify (this=0x7ffd0b6fc0c0, receiver=0x555e9b242f60, e=0x7ffd0b6fb160) at kernel/qapplication.cpp:3499
#102 0x00007efebe568328 in QCoreApplication::notifyInternal2 (receiver=0x555e9b242f60, event=0x7ffd0b6fb160) at kernel/qcoreapplication.cpp:1061
#103 0x00007efebe5684fe in QCoreApplication::sendEvent (receiver=receiver@entry=0x555e9b242f60, event=event@entry=0x7ffd0b6fb160) at kernel/qcoreapplication.cpp:1451
#104 0x00007efebc6ef0ed in QQuickWindowPrivate::deliverMouseEvent (this=this@entry=0x555e9ad8ef00, pointerEvent=0x555e9e0a4900) at items/qquickwindow.cpp:1784
#105 0x00007efebc6f02db in QQuickWindowPrivate::deliverPointerEvent (this=this@entry=0x555e9ad8ef00, event=0x555e9e0a4900) at items/qquickwindow.cpp:2346
#106 0x00007efebc6f0f6e in QQuickWindowPrivate::handleMouseEvent (this=0x555e9ad8ef00, event=0x7ffd0b6fb160) at items/qquickwindow.cpp:2210
#107 0x00007efebedcaac5 in QWindow::event (this=this@entry=0x555e9af11310, ev=ev@entry=0x7ffd0b6fb160) at kernel/qwindow.cpp:2336
#108 0x00007efebc6f2285 in QQuickWindow::event (this=0x555e9af11310, e=0x7ffd0b6fb160) at items/qquickwindow.cpp:1673
#109 0x00007efebf5ed8ac in QApplicationPrivate::notify_helper (this=this@entry=0x555e9aad9900, receiver=receiver@entry=0x555e9af11310, e=e@entry=0x7ffd0b6fb160) at kernel/qapplication.cpp:3752
#110 0x00007efebf5f4e40 in QApplication::notify (this=0x7ffd0b6fc0c0, receiver=0x555e9af11310, e=0x7ffd0b6fb160) at kernel/qapplication.cpp:3499
#111 0x00007efebe568328 in QCoreApplication::notifyInternal2 (receiver=0x555e9af11310, event=0x7ffd0b6fb160) at kernel/qcoreapplication.cpp:1061
#112 0x00007efebe5684fe in QCoreApplication::sendEvent (receiver=<optimized out>, event=event@entry=0x7ffd0b6fb160) at kernel/qcoreapplication.cpp:1451
#113 0x00007efebcd95bdc in QQuickWidget::mouseReleaseEvent (this=<optimized out>, e=0x7ffd0b6fb7b0) at qquickwidget.cpp:1372
#114 0x00007efebf62d8a8 in QWidget::event (this=this@entry=0x555e9af62a10, event=event@entry=0x7ffd0b6fb7b0) at kernel/qwidget.cpp:9268
#115 0x00007efebcd95dbb in QQuickWidget::event (this=0x555e9af62a10, e=0x7ffd0b6fb7b0) at qquickwidget.cpp:1525
#116 0x00007efebf5ed8ac in QApplicationPrivate::notify_helper (this=this@entry=0x555e9aad9900, receiver=receiver@entry=0x555e9af62a10, e=e@entry=0x7ffd0b6fb7b0) at kernel/qapplication.cpp:3752
#117 0x00007efebf5f5d18 in QApplication::notify (this=<optimized out>, receiver=0x555e9af62a10, e=0x7ffd0b6fb7b0) at kernel/qapplication.cpp:3213
#118 0x00007efebe568328 in QCoreApplication::notifyInternal2 (receiver=0x555e9af62a10, event=0x7ffd0b6fb7b0) at kernel/qcoreapplication.cpp:1061
#119 0x00007efebe56850e in QCoreApplication::sendSpontaneousEvent (receiver=receiver@entry=0x555e9af62a10, event=event@entry=0x7ffd0b6fb7b0) at kernel/qcoreapplication.cpp:1463
#120 0x00007efebf5f430f in QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x555e9af62a10, event=event@entry=0x7ffd0b6fb7b0, alienWidget=0x555e9af62a10, nativeWidget=0x555e9ab89ce0, buttonDown=buttonDown@entry=0x7efebfcee8b0 <qt_button_down>, lastMouseReceiver=..., spontaneous=true, onlyDispatchEnterLeave=false) at kernel/qapplication.cpp:2699
#121 0x00007efebf648af0 in QWidgetWindow::handleMouseEvent (this=this@entry=0x555e9ad8f800, event=event@entry=0x7ffd0b6fbc40) at kernel/qwidgetwindow.cpp:661
#122 0x00007efebf64b57a in QWidgetWindow::event (this=0x555e9ad8f800, event=0x7ffd0b6fbc40) at kernel/qwidgetwindow.cpp:281
#123 0x00007efebf5ed8ac in QApplicationPrivate::notify_helper (this=this@entry=0x555e9aad9900, receiver=receiver@entry=0x555e9ad8f800, e=e@entry=0x7ffd0b6fbc40) at kernel/qapplication.cpp:3752
#124 0x00007efebf5f4e40 in QApplication::notify (this=0x7ffd0b6fc0c0, receiver=0x555e9ad8f800, e=0x7ffd0b6fbc40) at kernel/qapplication.cpp:3499
#125 0x00007efebe568328 in QCoreApplication::notifyInternal2 (receiver=0x555e9ad8f800, event=0x7ffd0b6fbc40) at kernel/qcoreapplication.cpp:1061
#126 0x00007efebe56850e in QCoreApplication::sendSpontaneousEvent (receiver=receiver@entry=0x555e9ad8f800, event=event@entry=0x7ffd0b6fbc40) at kernel/qcoreapplication.cpp:1463
#127 0x00007efebedbf52b in QGuiApplicationPrivate::processMouseEvent (e=0x555e9e013190) at kernel/qguiapplication.cpp:2102
#128 0x00007efebedc0695 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x555e9e013190) at kernel/qguiapplication.cpp:1837
#129 0x00007efebed9914b in QWindowSystemInterface::sendWindowSystemEvents (flags=flags@entry=...) at kernel/qwindowsysteminterface.cpp:1068
#130 0x00007efeb151a30a in xcbSourceDispatch (source=<optimized out>) at qxcbeventdispatcher.cpp:105
#131 0x00007efeb6ceb417 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#132 0x00007efeb6ceb650 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#133 0x00007efeb6ceb6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#134 0x00007efebe5c513f in QEventDispatcherGlib::processEvents (this=0x555e9ab2eb70, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#135 0x00007efebe56664a in QEventLoop::exec (this=this@entry=0x7ffd0b6fbfe0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#136 0x00007efebe56f800 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1364
#137 0x0000555e9a501218 in main (argc=<optimized out>, argv=<optimized out>) at ./app/main.cpp:71
Comment 1 Julian Steinmann 2019-05-12 10:30:00 UTC 
Thanks for your report, sadly another reporter with a near identical backtrace was about half an hour faster, so I'll close this bug as a duplicate ;)

*** This bug has been marked as a duplicate of bug 407446 ***