Application: systemsettings5 (5.5.4)

Qt Version: 5.5.1
Operating System: Linux 4.4.3-300.fc23.x86_64 x86_64
Distribution: "Fedora release 23 (Twenty Three)"

-- Information about the crash:
- What I was doing when the application crashed:
crashed after deleting the a online account (google) . 
taskbar became irresponsive.  Clicking(left/right) on taskbar or dekstop does not produce anything.
Could'nt  reproduce it.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Aborted
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f54c9d6d8c0 (LWP 20342))]

Thread 6 (Thread 0x7f549f4a0700 (LWP 20345)):
#0  0x00007f54bf95f734 in g_mutex_unlock () at /lib64/libglib-2.0.so.0
#1  0x00007f54bf91a700 in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#2  0x00007f54bf91b09b in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007f54bf91b27c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f54c4e8eecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f54c4e35eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f54c4c52434 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f54c342a9b5 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#8  0x00007f54c4c573de in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x00007f54c074f60a in start_thread () at /lib64/libpthread.so.0
#10 0x00007f54c405aa4d in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f5492b3b700 (LWP 20348)):
#0  0x00007f54c404efdd in poll () at /lib64/libc.so.6
#1  0x00007f54bf91b16c in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f54bf91b27c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f54c4e8eecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f54c4e35eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f54c4c52434 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f54c342a9b5 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f54c4c573de in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f54c074f60a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f54c405aa4d in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f5497df7700 (LWP 20349)):
#0  0x00007f54bf95f719 in g_mutex_lock () at /lib64/libglib-2.0.so.0
#1  0x00007f54bf91a719 in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#2  0x00007f54bf91b09b in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007f54bf91b27c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f54c4e8eecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f54c4e35eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f54c4c52434 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f54c342a9b5 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#8  0x00007f54c4c573de in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x00007f54c074f60a in start_thread () at /lib64/libpthread.so.0
#10 0x00007f54c405aa4d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f5495cf8700 (LWP 20492)):
#0  0x00007f54c404efdd in poll () at /lib64/libc.so.6
#1  0x00007f54bf91b16c in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f54bf91b27c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f54bf91b2b9 in glib_worker_main () at /lib64/libglib-2.0.so.0
#4  0x00007f54bf941835 in g_thread_proxy () at /lib64/libglib-2.0.so.0
#5  0x00007f54c074f60a in start_thread () at /lib64/libpthread.so.0
#6  0x00007f54c405aa4d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f54954f7700 (LWP 20493)):
#0  0x00007f54c404efdd in poll () at /lib64/libc.so.6
#1  0x00007f54bf91b16c in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f54bf91b4f2 in g_main_loop_run () at /lib64/libglib-2.0.so.0
#3  0x00007f5495dd9336 in gdbus_shared_thread_func () at /lib64/libgio-2.0.so.0
#4  0x00007f54bf941835 in g_thread_proxy () at /lib64/libglib-2.0.so.0
#5  0x00007f54c074f60a in start_thread () at /lib64/libpthread.so.0
#6  0x00007f54c405aa4d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f54c9d6d8c0 (LWP 20342)):
[KCrash Handler]
#5  0x00007f54c3f8ca98 in raise () at /lib64/libc.so.6
#6  0x00007f54c3f8e69a in abort () at /lib64/libc.so.6
#7  0x00007f54c3fcfdaa in  () at /lib64/libc.so.6
#8  0x00007f54c3fd84fa in _int_free () at /lib64/libc.so.6
#9  0x00007f54c3fdbcac in free () at /lib64/libc.so.6
#10 0x00007f54c59f62ee in QDBusAbstractInterfacePrivate::~QDBusAbstractInterfacePrivate() () at /lib64/libQt5DBus.so.5
#11 0x00007f54c4e6f0b8 in QObject::~QObject() () at /lib64/libQt5Core.so.5
#12 0x00007f5483b67737 in Tp::Client::DBus::PropertiesInterface::~PropertiesInterface() () at /lib64/libtelepathy-qt5.so.0
#13 0x00007f54c4e6580b in QObjectPrivate::deleteChildren() () at /lib64/libQt5Core.so.5
#14 0x00007f54c4e6f070 in QObject::~QObject() () at /lib64/libQt5Core.so.5
#15 0x00007f5483ae5269 in Tp::Connection::~Connection() () at /lib64/libtelepathy-qt5.so.0
#16 0x00007f54839dee51 in Tp::Account::Private::~Private() () at /lib64/libtelepathy-qt5.so.0
#17 0x00007f54839df09d in Tp::Account::~Account() () at /lib64/libtelepathy-qt5.so.0
#18 0x00007f54839df129 in Tp::Account::~Account() () at /lib64/libtelepathy-qt5.so.0
#19 0x00007f5492fc79b3 in KAccountsUiProvider::~KAccountsUiProvider() () at /usr/lib64/qt5/plugins/kaccounts/ui/ktpaccountskcm_plugin_kaccounts.so
#20 0x00007f5492fc7b29 in KAccountsUiProvider::~KAccountsUiProvider() () at /usr/lib64/qt5/plugins/kaccounts/ui/ktpaccountskcm_plugin_kaccounts.so
#21 0x00007f5493dd6c96 in UiPluginsManagerPrivate::~UiPluginsManagerPrivate() () at /usr/lib64/qt5/plugins/kcm_kaccounts.so
#22 0x00007f5493dd6d79 in (anonymous namespace)::Q_QGS_s_instance::innerFunction()::Holder::~Holder() () at /usr/lib64/qt5/plugins/kcm_kaccounts.so
#23 0x00007f54c3f91658 in __run_exit_handlers () at /lib64/libc.so.6
#24 0x00007f54c3f916a5 in  () at /lib64/libc.so.6
#25 0x00007f54c3f78587 in __libc_start_main () at /lib64/libc.so.6
#26 0x0000559a5bf1fd19 in _start ()

Reported using DrKonqi