Application: systemsettings5 (5.3.2)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-31-generic x86_64
Distribution: Ubuntu 15.04

-- Information about the crash:
- What I was doing when the application crashed: Just browsing system settings and it crashed.  And my taskbar has frozen this time too

The crash can be reproduced sometimes.

-- 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 0x7ffb06dbe780 (LWP 1935))]

Thread 3 (Thread 0x7ffaf5373700 (LWP 1936)):
#0  0x00007ffb0353a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffb0184eb72 in poll (__timeout=-1, __nfds=1, __fds=0x7ffaf5372d40) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  _xcb_conn_wait (c=c@entry=0x1d0ef30, cond=cond@entry=0x1d0ef70, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:447
#3  0x00007ffb0185064f in xcb_wait_for_event (c=0x1d0ef30) at ../../src/xcb_in.c:622
#4  0x00007ffaf814e099 in QXcbEventReader::run (this=0x1d1d080) at qxcbconnection.cpp:1105
#5  0x00007ffb03bbbb0e in QThreadPrivate::start (arg=0x1d1d080) at thread/qthread_unix.cpp:337
#6  0x00007ffb0076c6aa in start_thread (arg=0x7ffaf5373700) at pthread_create.c:333
#7  0x00007ffb03545eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7ffade0e8700 (LWP 1949)):
#0  0x00007ffb002927a4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007ffb0024ce5e in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffb0024dd75 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffb0024e242 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007ffad70ebaf6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#5  0x00007ffb00274955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007ffb0076c6aa in start_thread (arg=0x7ffade0e8700) at pthread_create.c:333
#7  0x00007ffb03545eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7ffb06dbe780 (LWP 1935)):
[KCrash Handler]
#6  0x00007ffb02642d89 in QQuickItemPrivate::addToDirtyList() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007ffb02642e28 in QQuickItemPrivate::dirty(QQuickItemPrivate::DirtyType) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007ffb0264d045 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007ffb03e2b73a in QObject::event (this=0x2204330, e=<optimized out>) at kernel/qobject.cpp:1245
#10 0x00007ffb0264bb6b in QQuickItem::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007ffb04be8b2c in QApplicationPrivate::notify_helper (this=0x1cefba0, receiver=0x2204330, e=0x7ffac814ffc0) at kernel/qapplication.cpp:3720
#12 0x00007ffb04bee000 in QApplication::notify (this=0x7ffe1c1031a0, receiver=0x2204330, e=0x7ffac814ffc0) at kernel/qapplication.cpp:3503
#13 0x00007ffb03df9c2b in QCoreApplication::notifyInternal (this=0x7ffe1c1031a0, receiver=0x2204330, event=event@entry=0x7ffac814ffc0) at kernel/qcoreapplication.cpp:935
#14 0x00007ffb03dfbc9b in sendEvent (event=0x7ffac814ffc0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#15 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1ceedc0) at kernel/qcoreapplication.cpp:1552
#16 0x00007ffb03dfc298 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410
#17 0x00007ffb03e52843 in postEventSourceDispatch (s=0x1d5bd30) at kernel/qeventdispatcher_glib.cpp:271
#18 0x00007ffb0024dc3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007ffb0024df20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007ffb0024dfcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007ffb03e52c57 in QEventDispatcherGlib::processEvents (this=0x1d5b7e0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#22 0x00007ffb03df73e2 in QEventLoop::exec (this=this@entry=0x7ffe1c103080, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#23 0x00007ffb03dff02c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#24 0x00007ffb0462331c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#25 0x00007ffb04be47a5 in QApplication::exec () at kernel/qapplication.cpp:2956
#26 0x000000000040ef6b in main (argc=1, argv=<optimized out>) at ../../app/main.cpp:55

Possible duplicates by query: bug 353782, bug 353583, bug 353472, bug 353163, bug 353100.

Reported using DrKonqi