Version:           unspecified (using Devel) 
OS:                Linux

This is the bt:

Application: Plasma-Desktop-Umgebung (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7ff63247f780 (LWP 7910))]

Thread 2 (Thread 0x7ff61632a700 (LWP 7939)):
#0  0x00007ff630d76f6d in pthread_mutex_unlock () from /lib/libpthread.so.0
#1  0x00007ff62c910741 in g_main_context_prepare (context=0x16cef10, priority=0x7ff616329cac) at gmain.c:2467
#2  0x00007ff62c911639 in g_main_context_iterate (context=0x16cef10, block=1, dispatch=1, self=<value optimized out>) at gmain.c:2760
#3  0x00007ff62c911cdd in g_main_context_iteration (context=0x16cef10, may_block=1) at gmain.c:2843
#4  0x00007ff6311226a6 in QEventDispatcherGlib::processEvents (this=0x1776ae0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:417
#5  0x00007ff6310f5342 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#6  0x00007ff6310f5724 in QEventLoop::exec (this=0x7ff616329dc0, flags=) at kernel/qeventloop.cpp:201
#7  0x00007ff631001f2d in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:490
#8  0x00007ff6310d5538 in QInotifyFileSystemWatcherEngine::run (this=0x16b7b50) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007ff631004ebe in QThreadPrivate::start (arg=0x16b7b50) at thread/qthread_unix.cpp:285
#10 0x00007ff630d72e1c in start_thread () from /lib/libpthread.so.0
#11 0x00007ff62fb0ce1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 1 (Thread 0x7ff63247f780 (LWP 7910)):
[KCrash Handler]
#6  0x00007ff61962add7 in TaskItemLayout::layoutItems (this=0x168abf0) at /var/tmp/portage/kde-base/plasma-workspace-4.6.9999/work/plasma-workspace-4.6.9999/plasma/desktop/applets/tasks/taskitemlayout.cpp:347
#7  0x00007ff61962b5b9 in TaskItemLayout::insert (this=0x168abf0, index=<value optimized out>, item=0x2c475b0) at /var/tmp/portage/kde-base/plasma-workspace-4.6.9999/work/plasma-workspace-4.6.9999/plasma/desktop/applets/tasks/taskitemlayout.cpp:149
#8  0x00007ff61962b70c in TaskItemLayout::addTaskItem (this=0x168abf0, item=0x2c475b0) at /var/tmp/portage/kde-base/plasma-workspace-4.6.9999/work/plasma-workspace-4.6.9999/plasma/desktop/applets/tasks/taskitemlayout.cpp:102
#9  0x00007ff619637c90 in TaskGroupItem::itemAdded (this=0x168d660, groupableItem=<value optimized out>) at /var/tmp/portage/kde-base/plasma-workspace-4.6.9999/work/plasma-workspace-4.6.9999/plasma/desktop/applets/tasks/taskgroupitem.cpp:509
#10 0x00007ff619637fc1 in TaskGroupItem::reload (this=0x168d660) at /var/tmp/portage/kde-base/plasma-workspace-4.6.9999/work/plasma-workspace-4.6.9999/plasma/desktop/applets/tasks/taskgroupitem.cpp:330
#11 0x00007ff619638367 in TaskGroupItem::setGroup (this=0x168d660, group=0x15dab50) at /var/tmp/portage/kde-base/plasma-workspace-4.6.9999/work/plasma-workspace-4.6.9999/plasma/desktop/applets/tasks/taskgroupitem.cpp:379
#12 0x00007ff619627dac in Tasks::qt_metacall (this=0x1363660, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff68dcb290) at /var/tmp/portage/kde-base/plasma-workspace-4.6.9999/work/plasma-workspace-4.6.9999_build/plasma/desktop/applets/tasks/tasks.moc:99
#13 0x00007ff63110e24f in QMetaObject::activate (sender=0x1677ed0, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x1) at kernel/qobject.cpp:3272
#14 0x00007ff61986673b in TaskManager::GroupManagerPrivate::actuallyReloadTasks (this=0x1684c40) at /var/tmp/portage/kde-base/libtaskmanager-4.6.9999/work/libtaskmanager-4.6.9999/libs/taskmanager/groupmanager.cpp:191
#15 0x00007ff619867ba9 in TaskManager::GroupManager::qt_metacall (this=0x1677ed0, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0x7fff68dcb4b0) at /var/tmp/portage/kde-base/libtaskmanager-4.6.9999/work/libtaskmanager-4.6.9999_build/libs/taskmanager/groupmanager.moc:117
#16 0x00007ff63110e24f in QMetaObject::activate (sender=0x1684c98, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x1) at kernel/qobject.cpp:3272
#17 0x00007ff631108009 in QObject::event (this=0x1684c98, e=0x7fff68dcac80) at kernel/qobject.cpp:1175
#18 0x00007ff6302804ac in QApplicationPrivate::notify_helper (this=0xe936d0, receiver=0x1684c98, e=0x7fff68dcbbf0) at kernel/qapplication.cpp:4445
#19 0x00007ff6302858ed in QApplication::notify (this=0xe89610, receiver=0x1684c98, e=0x7fff68dcbbf0) at kernel/qapplication.cpp:4324
#20 0x00007ff631e8dfe6 in KApplication::notify (this=0xe89610, receiver=0x1684c98, event=0x7fff68dcbbf0) at /var/tmp/portage/kde-base/kdelibs-4.6.9999/work/kdelibs-4.6.9999/kdeui/kernel/kapplication.cpp:311
#21 0x00007ff6310f65eb in QCoreApplication::notifyInternal (this=0xe89610, receiver=0x1684c98, event=0x7fff68dcbbf0) at kernel/qcoreapplication.cpp:732
#22 0x00007ff63112572a in sendEvent (this=0xe96df0) at kernel/qcoreapplication.h:215
#23 QTimerInfoList::activateTimers (this=0xe96df0) at kernel/qeventdispatcher_unix.cpp:603
#24 0x00007ff631122964 in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#25 0x00007ff62c911262 in g_main_dispatch (context=0xe95d20) at gmain.c:2149
#26 g_main_context_dispatch (context=0xe95d20) at gmain.c:2702
#27 0x00007ff62c911a40 in g_main_context_iterate (context=0xe95d20, block=1, dispatch=1, self=<value optimized out>) at gmain.c:2780
#28 0x00007ff62c911cdd in g_main_context_iteration (context=0xe95d20, may_block=1) at gmain.c:2843
#29 0x00007ff631122653 in QEventDispatcherGlib::processEvents (this=0xe8a050, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:415
#30 0x00007ff630331dae in QGuiEventDispatcherGlib::processEvents (this=0x3c70c80, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#31 0x00007ff6310f5342 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#32 0x00007ff6310f5724 in QEventLoop::exec (this=0x7fff68dcbe80, flags=) at kernel/qeventloop.cpp:201
#33 0x00007ff6310f979b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009
#34 0x00007ff62209dc58 in kdemain (argc=1, argv=0xe3d8b0) at /var/tmp/portage/kde-base/plasma-workspace-4.6.9999/work/plasma-workspace-4.6.9999/plasma/desktop/shell/main.cpp:118
#35 0x0000000000407659 in launch (argc=1, _name=0xe14de8 "/usr/bin/plasma-desktop", args=<value optimized out>, cwd=0x0, envc=<value optimized out>, envs=<value optimized out>, reset_env=false, tty=0x0, avoid_loops=false, startup_id_str=0x40b62e "0") at /var/tmp/portage/kde-base/kdelibs-4.6.9999/work/kdelibs-4.6.9999/kinit/kinit.cpp:730
#36 0x00000000004081a7 in handle_launcher_request (sock=<value optimized out>, who=<value optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.6.9999/work/kdelibs-4.6.9999/kinit/kinit.cpp:1222
#37 0x00000000004088b5 in handle_requests (waitForPid=0) at /var/tmp/portage/kde-base/kdelibs-4.6.9999/work/kdelibs-4.6.9999/kinit/kinit.cpp:1415
#38 0x00000000004094c7 in main (argc=4, argv=0x7fff68dcd328, envp=0x7fff68dcd350) at /var/tmp/portage/kde-base/kdelibs-4.6.9999/work/kdelibs-4.6.9999/kinit/kinit.cpp:1903


Reproducible: Didn't try