Program received signal SIGSEGV, Segmentation fault.
QGraphicsLayoutItem::setParentLayoutItem (this=0x24086b0, parent=0x0) at graphicsview/qgraphicslayoutitem.cpp:856
856     graphicsview/qgraphicslayoutitem.cpp: No such file or directory.
        in graphicsview/qgraphicslayoutitem.cpp
(gdb) backtrace
#0  QGraphicsLayoutItem::setParentLayoutItem (this=0x24086b0, parent=0x0) at graphicsview/qgraphicslayoutitem.cpp:856
#1  0x00007f11aa7166c4 in QGraphicsGridLayout::removeAt (this=0x2417a10, index=<optimized out>) at graphicsview/qgraphicsgridlayout.cpp:583
#2  0x00007f1194b57bb3 in SystemTray::TaskArea::relayoutHiddenTasks (this=0x2415350) at ../../../../../plasma/generic/applets/systemtray/ui/taskarea.cpp:422
#3  0x00007f1194b580cc in SystemTray::TaskArea::qt_metacall (this=0x2415350, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x7fff945c21d0) at ./taskarea.moc:93
#4  0x00007f11aada6e8a in QMetaObject::activate (sender=0x2415430, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3278
#5  0x00007f11aadaa759 in QObject::event (this=0x2415430, e=<optimized out>) at kernel/qobject.cpp:1181
#6  0x00007f11aa160f64 in notify_helper (e=0x7fff945c2730, receiver=0x2415430, this=0xa66090) at kernel/qapplication.cpp:4486
#7  QApplicationPrivate::notify_helper (this=0xa66090, receiver=0x2415430, e=0x7fff945c2730) at kernel/qapplication.cpp:4458
#8  0x00007f11aa165dd1 in QApplication::notify (this=0xa58d90, receiver=0x2415430, e=0x7fff945c2730) at kernel/qapplication.cpp:4365
#9  0x00007f11aba3c126 in KApplication::notify (this=0xa58d90, receiver=0x2415430, event=0x7fff945c2730) at ../../kdeui/kernel/kapplication.cpp:311
#10 0x00007f11aad93c2c in QCoreApplication::notifyInternal (this=0xa58d90, receiver=0x2415430, event=0x7fff945c2730) at kernel/qcoreapplication.cpp:787
#11 0x00007f11aadc0d32 in sendEvent (event=0x7fff945c2730, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#12 QTimerInfoList::activateTimers (this=0xa6c2c0) at kernel/qeventdispatcher_unix.cpp:603
#13 0x00007f11aadbe4e4 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#14 0x00007f11a2188a0d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#15 0x00007f11a2189208 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#16 0x00007f11a21893d9 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007f11aadbeea6 in QEventDispatcherGlib::processEvents (this=0x9f9f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#18 0x00007f11aa208bbe in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#19 0x00007f11aad92e22 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#20 0x00007f11aad93027 in QEventLoop::exec (this=0x7fff945c29c0, flags=...) at kernel/qeventloop.cpp:201
#21 0x00007f11aad97759 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#22 0x00007f11aded21a3 in kdemain (argc=1, argv=0x7fff945c2da8) at ../../../../plasma/desktop/shell/main.cpp:120
#23 0x00007f11adb1330d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff945c2da8, init=<optimized out>, fini=<optimized out>, 
    rtld_fini=<optimized out>, stack_end=0x7fff945c2d98) at libc-start.c:226
#24 0x0000000000400671 in _start ()