Application: kded4 (4.11.4)
KDE Platform Version: 4.11.4
Qt Version: 4.8.4
Operating System: Linux 3.12.0-7-generic x86_64
Distribution: Ubuntu Trusty Tahr (development branch)

-- Information about the crash:
<In detail, tell us what you were doing  when the application crashed.>

The crash can be reproduced every time.

-- Backtrace:
Application: KDE Daemon (kded4), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f926aba47c0 (LWP 3568))]

Thread 7 (Thread 0x7f924d967700 (LWP 3570)):
#0  0x00007f92654f0dda in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f92654f1119 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f92654b0267 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f92654b0c13 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f92654b0dfc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f926982f6c6 in QEventDispatcherGlib::processEvents (this=0x7f92480008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f926980127f in QEventLoop::processEvents (this=this@entry=0x7f924d966e20, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f9269801575 in QEventLoop::exec (this=this@entry=0x7f924d966e20, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f926970085f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#9  0x00007f9269702eff in QThreadPrivate::start (arg=0x230f770) at thread/qthread_unix.cpp:338
#10 0x00007f9265b98182 in start_thread (arg=0x7f924d967700) at pthread_create.c:312
#11 0x00007f92683faa6d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7f9240887700 (LWP 3581)):
#0  0x00007f92683ebd5d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9257d39e61 in ?? () from /usr/lib/nvidia-331/tls/libnvidia-tls.so.331.20
#2  0x00007f92654f03d0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f92654b0824 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f92654b0c8b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f92654b0dfc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f926982f6c6 in QEventDispatcherGlib::processEvents (this=0x7f92180008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#7  0x00007f926980127f in QEventLoop::processEvents (this=this@entry=0x7f9240886e20, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007f9269801575 in QEventLoop::exec (this=this@entry=0x7f9240886e20, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007f926970085f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#10 0x00007f9269702eff in QThreadPrivate::start (arg=0x23b5df0) at thread/qthread_unix.cpp:338
#11 0x00007f9265b98182 in start_thread (arg=0x7f9240887700) at pthread_create.c:312
#12 0x00007f92683faa6d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7f923973f700 (LWP 3588)):
#0  0x00007f92683ed65d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f92654b0cf4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f92654b115a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9239c4dd26 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f92654d5ca5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f9265b98182 in start_thread (arg=0x7f923973f700) at pthread_create.c:312
#6  0x00007f92683faa6d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7f9238d2f700 (LWP 3589)):
#0  0x00007f92654f0dda in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f92654f1119 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f92654afe40 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f92654b0bb5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f92654b0dfc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f926982f6c6 in QEventDispatcherGlib::processEvents (this=0x7f92100008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f926980127f in QEventLoop::processEvents (this=this@entry=0x7f9238d2ede0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f9269801575 in QEventLoop::exec (this=this@entry=0x7f9238d2ede0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f926970085f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#9  0x00007f92470cf0c7 in KCupsConnection::run() () from /usr/lib/libkcupslib.so
#10 0x00007f9269702eff in QThreadPrivate::start (arg=0x2449e80) at thread/qthread_unix.cpp:338
#11 0x00007f9265b98182 in start_thread (arg=0x7f9238d2f700) at pthread_create.c:312
#12 0x00007f92683faa6d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f9233fff700 (LWP 3590)):
#0  0x00007f92683ed65d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f92654b0cf4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f92654b0dfc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f926982f6c6 in QEventDispatcherGlib::processEvents (this=0x7f92040008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f926980127f in QEventLoop::processEvents (this=this@entry=0x7f9233ffee20, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f9269801575 in QEventLoop::exec (this=this@entry=0x7f9233ffee20, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f926970085f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#7  0x00007f9269702eff in QThreadPrivate::start (arg=0x2300580) at thread/qthread_unix.cpp:338
#8  0x00007f9265b98182 in start_thread (arg=0x7f9233fff700) at pthread_create.c:312
#9  0x00007f92683faa6d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f92337fe700 (LWP 3591)):
#0  0x00007f92683ed65d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f92654b0cf4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f92654b0dfc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f926982f6c6 in QEventDispatcherGlib::processEvents (this=0x7f92080008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f926980127f in QEventLoop::processEvents (this=this@entry=0x7f92337fdde0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f9269801575 in QEventLoop::exec (this=this@entry=0x7f92337fdde0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f926970085f in QThread::exec (this=this@entry=0x22edb40) at thread/qthread.cpp:542
#7  0x00007f92697e2ab3 in QInotifyFileSystemWatcherEngine::run (this=0x22edb40) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007f9269702eff in QThreadPrivate::start (arg=0x22edb40) at thread/qthread_unix.cpp:338
#9  0x00007f9265b98182 in start_thread (arg=0x7f92337fe700) at pthread_create.c:312
#10 0x00007f92683faa6d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f926aba47c0 (LWP 3568)):
[KCrash Handler]
#6  nl_object_get_id_attrs (obj=0x7f92329de3c0 <route_obj_ops>) at /build/buildd/libnl3-3.2.21/./lib/object.c:523
#7  0x00007f92329e9ba1 in ?? () from /usr/lib/ntrack/modules/ntrack-libnl3_x.so
#8  0x00007f92329ea18d in _ntrack_arch_process_data () from /usr/lib/ntrack/modules/ntrack-libnl3_x.so
#9  0x00007f9232dfa08b in QNtrack::socketActivated(int) () from /usr/lib/libntrack-qt4.so.1
#10 0x00007f92698166d8 in QMetaObject::activate (sender=sender@entry=0x223aca0, m=m@entry=0x7f9269b65a40 <QSocketNotifier::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff07b82250) at kernel/qobject.cpp:3539
#11 0x00007f9269860f7e in QSocketNotifier::activated (this=this@entry=0x223aca0, _t1=34) at .moc/release-shared/moc_qsocketnotifier.cpp:103
#12 0x00007f926981f44b in QSocketNotifier::event (this=0x223aca0, e=0x7fff07b82580) at kernel/qsocketnotifier.cpp:317
#13 0x00007f9268b99dac in QApplicationPrivate::notify_helper (this=this@entry=0x21414c0, receiver=receiver@entry=0x223aca0, e=e@entry=0x7fff07b82580) at kernel/qapplication.cpp:4567
#14 0x00007f9268ba0420 in QApplication::notify (this=this@entry=0x7fff07b828f0, receiver=receiver@entry=0x223aca0, e=e@entry=0x7fff07b82580) at kernel/qapplication.cpp:4353
#15 0x00007f926a5918ba in KApplication::notify (this=0x7fff07b828f0, receiver=0x223aca0, event=0x7fff07b82580) at ../../kdeui/kernel/kapplication.cpp:311
#16 0x00007f926980254d in QCoreApplication::notifyInternal (this=0x7fff07b828f0, receiver=0x223aca0, event=event@entry=0x7fff07b82580) at kernel/qcoreapplication.cpp:946
#17 0x00007f92698301e0 in sendEvent (event=0x7fff07b82580, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#18 socketNotifierSourceDispatch (source=0x2140b60) at kernel/qeventdispatcher_glib.cpp:110
#19 0x00007f92654b0b14 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f92654b0d58 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f92654b0dfc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f926982f6a5 in QEventDispatcherGlib::processEvents (this=0x1ef0670, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#23 0x00007f9268c3b8c6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#24 0x00007f926980127f in QEventLoop::processEvents (this=this@entry=0x7fff07b827c0, flags=...) at kernel/qeventloop.cpp:149
#25 0x00007f9269801575 in QEventLoop::exec (this=this@entry=0x7fff07b827c0, flags=...) at kernel/qeventloop.cpp:204
#26 0x00007f9269806ad9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#27 0x00007f9268b982fc in QApplication::exec () at kernel/qapplication.cpp:3828
#28 0x00007f925389a97b in kdemain (argc=1, argv=0x211ee00) at ../../kded/kded.cpp:925
#29 0x0000000000408427 in launch (argc=argc@entry=1, _name=_name@entry=0x40b007 "kded4", args=args@entry=0x0, cwd=cwd@entry=0x0, envc=envc@entry=0, envs=<optimized out>, envs@entry=0x0, reset_env=reset_env@entry=false, tty=tty@entry=0x0, avoid_loops=avoid_loops@entry=false, startup_id_str=startup_id_str@entry=0x40ae96 "0") at ../../kinit/kinit.cpp:738
#30 0x00000000004059d3 in main (argc=4, argv=<optimized out>, envp=0x7fff07b83050) at ../../kinit/kinit.cpp:1853


Reproducible: Always

Steps to Reproduce:
1.log in
2.
3.
Actual Results:  
kded4 crashes, icons in panels revert to gtk, unable to submit bug report due to "kded not running". Unable to "sudo service kded (or kded4) start" "unrecognized service kded (or kded4)