Application: systemsettings5 (5.13.5)

Qt Version: 5.11.1
Frameworks Version: 5.50.0
Operating System: Linux 4.18.0-17-generic x86_64
Distribution: Ubuntu 18.10

-- Information about the crash:
- Unusual behavior I noticed: in "Applications" -> "Launch feedback" the title of the windows flickers. After clicking the next option "Diagnostic", it crashes. Using kubuntu 18.10 installed yesterday.

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f179345a840 (LWP 5509))]

Thread 9 (Thread 0x7f174efe6700 (LWP 5628)):
#0  0x00007f1799822f64 in __GI___libc_read (fd=92, buf=0x7f174efe5c90, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f179699c180 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f179695691f in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1796956df0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f17969571d2 in g_main_loop_run () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f17547d77b6 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007f179697f135 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f1797ccc164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f1799833def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f175866f700 (LWP 5627)):
#0  0x00007f1796956808 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f1796956df0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f1796956f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1796956fb1 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f179697f135 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f1797ccc164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f1799833def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f1775b8c700 (LWP 5546)):
#0  0x00007f17998276d9 in __GI___poll (fds=0x7f1768004e00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f1796956e46 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f1796956f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1799d4a15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f1799cf716b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f1799b460b6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f1798e071f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f1799b4fc87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f1797ccc164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007f1799833def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f1777fff700 (LWP 5516)):
#0  0x00007f1799822f64 in __GI___libc_read (fd=14, buf=0x7f1777ffeb20, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f179699c180 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f179695691f in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1796956df0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f1796956f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f1799d4a15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f1799cf716b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f1799b460b6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f1798e071f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f1799b4fc87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f1797ccc164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#11 0x00007f1799833def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f1781bfc700 (LWP 5515)):
#0  0x00007f1799822f64 in __GI___libc_read (fd=13, buf=0x7f1781bfbb20, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f179699c180 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f179695691f in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1796956df0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f1796956f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f1799d4a15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f1799cf716b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f1799b460b6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f1798e071f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f1799b4fc87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f1797ccc164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#11 0x00007f1799833def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f1789815700 (LWP 5513)):
#0  0x00007f1797cd22eb in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55b2da183b88) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f1797cd22eb in __pthread_cond_wait_common (abstime=0x0, mutex=0x55b2da183b38, cond=0x55b2da183b60) at pthread_cond_wait.c:502
#2  0x00007f1797cd22eb in __pthread_cond_wait (cond=0x55b2da183b60, mutex=0x55b2da183b38) at pthread_cond_wait.c:655
#3  0x00007f1789ec8ebb in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f1789ec8c27 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f1797ccc164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f1799833def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f178bfff700 (LWP 5512)):
#0  0x00007f1799822f64 in __GI___libc_read (fd=7, buf=0x7f178bffeb10, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f179699c180 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f179695691f in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1796956df0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f1796956f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f1799d4a15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f1799cf716b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f1799b460b6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f179a003545 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007f1799b4fc87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f1797ccc164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#11 0x00007f1799833def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f1791df5700 (LWP 5511)):
#0  0x00007f17998276d9 in __GI___poll (fds=0x7f1791df4c78, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f1797c8a917 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f1797c8c53a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f1792d97159 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f1799b4fc87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f1797ccc164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f1799833def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f179345a840 (LWP 5509)):
[KCrash Handler]
#6  0x00007f179b10d300 in KQuickAddons::ConfigModule::needsSave() () at /usr/lib/x86_64-linux-gnu/libKF5QuickAddons.so.5
#7  0x00007f179b2434bb in  () at /usr/lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#8  0x00007f1799d21830 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f1757342d43 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kcms/kcm_launchfeedback.so
#10 0x00007f17573453e3 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/kcms/kcm_launchfeedback.so
#11 0x00007f1798d23084 in QV4::QObjectWrapper::setProperty(QV4::ExecutionEngine*, QObject*, QQmlPropertyData*, QV4::Value const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007f1798d23dde in QV4::QObjectWrapper::setQmlProperty(QV4::ExecutionEngine*, QQmlContextData*, QObject*, QV4::String*, QV4::QObjectWrapper::RevisionMode, QV4::Value const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007f1798d23ed4 in QV4::QObjectWrapper::put(QV4::Managed*, QV4::String*, QV4::Value const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#14 0x00007f1798d36eac in QV4::Runtime::method_storeProperty(QV4::ExecutionEngine*, QV4::Value const&, int, QV4::Value const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#15 0x00007f1798d42789 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007f175731cc4d in  ()
#17 0x00007f1774f4d320 in  ()
#18 0x00007f1774f4d328 in  ()
#19 0x000055b2dee56c70 in  ()
#20 0x0000000000000000 in  ()
[Inferior 1 (process 5509) detached]

Reported using DrKonqi