Jonathan, I've got the same symptoms (since upgrading to maverick last week) so I imagine my backtrace does little more than duplicate Konrad's, but here it is anyway.
Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault [Current thread is 1 (Thread 0x7ff46528e780 (LWP 8128))]
Thread 2 (Thread 0x7ff4445ba710 (LWP 8132)): #0 0x00007ff464ba1203 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87 #1 0x00007ff45981f009 in g_main_context_poll (context=0x1c048d0, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at /build/buildd/glib2.0-2.26.0/glib/gmain.c:3093 #2 g_main_context_iterate (context=0x1c048d0, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at /build/buildd/glib2.0-2.26.0/glib/gmain.c:2775 #3 0x00007ff45981f45c in g_main_context_iteration (context=0x1c048d0, may_block=1) at /build/buildd/glib2.0-2.26.0/glib/gmain.c:2843 #4 0x00007ff4622561e6 in QEventDispatcherGlib::processEvents (this=0x1ab3660, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:417 #5 0x00007ff462228a02 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149 #6 0x00007ff462228dec in QEventLoop::exec (this=0x7ff4445b9d90, flags=) at kernel/qeventloop.cpp:201 #7 0x00007ff4621332fd in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:490 #8 0x00007ff4622085f8 in QInotifyFileSystemWatcherEngine::run (this=0x1b8f450) at io/qfilesystemwatcher_inotify.cpp:248 #9 0x00007ff46213627e in QThreadPrivate::start (arg=0x1b8f450) at thread/qthread_unix.cpp:266 #10 0x00007ff461eab971 in start_thread (arg=<value optimized out>) at pthread_create.c:304 #11 0x00007ff464bad94d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112 #12 0x0000000000000000 in ?? ()
Thread 1 (Thread 0x7ff46528e780 (LWP 8128)): [KCrash Handler] #6 findActionItemForAction (this=0x22e5600, event=<value optimized out>) at /build/buildd/plasma-widget-message-indicator-0.5.6/src/listenermodel.cpp:189 #7 removeAction (this=0x22e5600, event=<value optimized out>) at /build/buildd/plasma-widget-message-indicator-0.5.6/src/listenermodel.cpp:177 #8 ServerItem::eventFilter (this=0x22e5600, event=<value optimized out>) at /build/buildd/plasma-widget-message-indicator-0.5.6/src/listenermodel.cpp:150 #9 0x00007ff462229507 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0x278ed00, event=0x7fffc1681e90) at kernel/qcoreapplication.cpp:847 #10 0x00007ff461373fac in QApplicationPrivate::notify_helper (this=0x126bbb0, receiver=0x278ed00, e=0x7fffc1681e90) at kernel/qapplication.cpp:4392 #11 0x00007ff461379aed in QApplication::notify (this=0x1254660, receiver=0x278ed00, e=0x7fffc1681e90) at kernel/qapplication.cpp:4277 #12 0x00007ff462ec5156 in KApplication::notify (this=0x1254660, receiver=0x278ed00, event=0x7fffc1681e90) at ../../kdeui/kernel/kapplication.cpp:310 #13 0x00007ff462229cdc in QCoreApplication::notifyInternal (this=0x1254660, receiver=0x278ed00, event=0x7fffc1681e90) at kernel/qcoreapplication.cpp:732 #14 0x00007ff4613bfbf1 in sendEvent (this=0x278ed00, action=0x265f900) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215 #15 QWidget::removeAction (this=0x278ed00, action=0x265f900) at kernel/qwidget.cpp:3169 #16 0x00007ff4617d4350 in QMenu::clear (this=<value optimized out>) at widgets/qmenu.cpp:1714 #17 0x00007ff45ab42324 in DBusMenuImporter::GetChildrenCallback(int, QDBusPendingCallWatcher*) () from /usr/lib/libdbusmenu-qt.so.2 #18 0x00007ff45ab41315 in DBusMenuImporter::dispatch(QDBusPendingCallWatcher*) () from /usr/lib/libdbusmenu-qt.so.2 #19 0x00007ff45ab459dc in DBusMenuImporter::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libdbusmenu-qt.so.2 #20 0x00007ff462241b27 in QMetaObject::activate (sender=0x1d8a4c0, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x1) at kernel/qobject.cpp:3280 #21 0x00007ff4625ba37f in QDBusPendingCallWatcher::finished (this=0x22e5600, _t1=0x1d8a4c0) at .moc/release-shared/moc_qdbuspendingcall.cpp:92 #22 0x00007ff4625ba409 in _q_finished (this=0x1d8a4c0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x257b640) at qdbuspendingcall.cpp:482 #23 QDBusPendingCallWatcher::qt_metacall (this=0x1d8a4c0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x257b640) at .moc/release-shared/moc_qdbuspendingcall.cpp:80 #24 0x00007ff46223bbde in QObject::event (this=0x1d8a4c0, e=0x22e5600) at kernel/qobject.cpp:1219 #25 0x00007ff461373fdc in QApplicationPrivate::notify_helper (this=0x126bbb0, receiver=0x1d8a4c0, e=0x2754e20) at kernel/qapplication.cpp:4396 #26 0x00007ff461379aed in QApplication::notify (this=0x1254660, receiver=0x1d8a4c0, e=0x2754e20) at kernel/qapplication.cpp:4277 #27 0x00007ff462ec5156 in KApplication::notify (this=0x1254660, receiver=0x1d8a4c0, event=0x2754e20) at ../../kdeui/kernel/kapplication.cpp:310 #28 0x00007ff462229cdc in QCoreApplication::notifyInternal (this=0x1254660, receiver=0x1d8a4c0, event=0x2754e20) at kernel/qcoreapplication.cpp:732 #29 0x00007ff46222cc22 in sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x1239560) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215 #30 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x1239560) at kernel/qcoreapplication.cpp:1373 #31 0x00007ff462256653 in sendPostedEvents (s=0x126f250) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220 #32 postEventSourceDispatch (s=0x126f250) at kernel/qeventdispatcher_glib.cpp:277 #33 0x00007ff45981b342 in g_main_dispatch (context=0x126e1f0) at /build/buildd/glib2.0-2.26.0/glib/gmain.c:2149 #34 g_main_context_dispatch (context=0x126e1f0) at /build/buildd/glib2.0-2.26.0/glib/gmain.c:2702 #35 0x00007ff45981f2a8 in g_main_context_iterate (context=0x126e1f0, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at /build/buildd/glib2.0-2.26.0/glib/gmain.c:2780 #36 0x00007ff45981f45c in g_main_context_iteration (context=0x126e1f0, may_block=1) at /build/buildd/glib2.0-2.26.0/glib/gmain.c:2843 #37 0x00007ff462256193 in QEventDispatcherGlib::processEvents (this=0x1239070, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:415 #38 0x00007ff461426a4e in QGuiEventDispatcherGlib::processEvents (this=0x22e5600, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204 #39 0x00007ff462228a02 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149 #40 0x00007ff462228dec in QEventLoop::exec (this=0x7fffc1682cc0, flags=) at kernel/qeventloop.cpp:201 #41 0x00007ff46222cebb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009 #42 0x00007ff464e84a56 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../../../plasma/desktop/shell/main.cpp:118 #43 0x00007ff464ae5d8e in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fffc1683088) at libc-start.c:226 #44 0x0000000000400669 in _start ()
Jonathan, I've got the same symptoms (since upgrading to maverick last week) so I imagine my backtrace does little more than duplicate Konrad's, but here it is anyway.
Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7ff46528e780 (LWP 8128))]
Thread 2 (Thread 0x7ff4445ba710 (LWP 8132)): unix/sysv/ linux/poll. c:87 buildd/ glib2.0- 2.26.0/ glib/gmain. c:3093 context_ iterate (context=0x1c048d0, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at /build/ buildd/ glib2.0- 2.26.0/ glib/gmain. c:2775 context_ iteration (context=0x1c048d0, may_block=1) at /build/ buildd/ glib2.0- 2.26.0/ glib/gmain. c:2843 rGlib:: processEvents (this=0x1ab3660, flags=<value optimized out>) at kernel/ qeventdispatche r_glib. cpp:417 :processEvents (this=<value optimized out>, flags=) at kernel/ qeventloop. cpp:149 b9d90, flags=) at kernel/ qeventloop. cpp:201 qthread. cpp:490 temWatcherEngin e::run (this=0x1b8f450) at io/qfilesystemw atcher_ inotify. cpp:248 :start (arg=0x1b8f450) at thread/ qthread_ unix.cpp: 266 create. c:304 unix/sysv/ linux/x86_ 64/clone. S:112
#0 0x00007ff464ba1203 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1) at ../sysdeps/
#1 0x00007ff45981f009 in g_main_context_poll (context=0x1c048d0, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at /build/
#2 g_main_
#3 0x00007ff45981f45c in g_main_
#4 0x00007ff4622561e6 in QEventDispatche
#5 0x00007ff462228a02 in QEventLoop:
#6 0x00007ff462228dec in QEventLoop::exec (this=0x7ff4445
#7 0x00007ff4621332fd in QThread::exec (this=<value optimized out>) at thread/
#8 0x00007ff4622085f8 in QInotifyFileSys
#9 0x00007ff46213627e in QThreadPrivate:
#10 0x00007ff461eab971 in start_thread (arg=<value optimized out>) at pthread_
#11 0x00007ff464bad94d in clone () at ../sysdeps/
#12 0x0000000000000000 in ?? ()
Thread 1 (Thread 0x7ff46528e780 (LWP 8128)): orAction (this=0x22e5600, event=<value optimized out>) at /build/ buildd/ plasma- widget- message- indicator- 0.5.6/src/ listenermodel. cpp:189 buildd/ plasma- widget- message- indicator- 0.5.6/src/ listenermodel. cpp:177 :eventFilter (this=0x22e5600, event=<value optimized out>) at /build/ buildd/ plasma- widget- message- indicator- 0.5.6/src/ listenermodel. cpp:150 nPrivate: :sendThroughObj ectEventFilters (this=<value optimized out>, receiver=0x278ed00, event=0x7fffc16 81e90) at kernel/ qcoreapplicatio n.cpp:847 vate::notify_ helper (this=0x126bbb0, receiver=0x278ed00, e=0x7fffc1681e90) at kernel/ qapplication. cpp:4392 :notify (this=0x1254660, receiver=0x278ed00, e=0x7fffc1681e90) at kernel/ qapplication. cpp:4277 :notify (this=0x1254660, receiver=0x278ed00, event=0x7fffc16 81e90) at ../../kdeui/ kernel/ kapplication. cpp:310 n::notifyIntern al (this=0x1254660, receiver=0x278ed00, event=0x7fffc16 81e90) at kernel/ qcoreapplicatio n.cpp:732 QtCore/ ../../src/ corelib/ kernel/ qcoreapplicatio n.h:215 :removeAction (this=0x278ed00, action=0x265f900) at kernel/ qwidget. cpp:3169 qmenu.cpp: 1714 r::GetChildrenC allback( int, QDBusPendingCal lWatcher* ) () from /usr/lib/ libdbusmenu- qt.so.2 r::dispatch( QDBusPendingCal lWatcher* ) () from /usr/lib/ libdbusmenu- qt.so.2 r::qt_metacall( QMetaObject: :Call, int, void**) () from /usr/lib/ libdbusmenu- qt.so.2 :activate (sender=0x1d8a4c0, m=<value optimized out>, local_signal_ index=< value optimized out>, argv=0x1) at kernel/ qobject. cpp:3280 lWatcher: :finished (this=0x22e5600, _t1=0x1d8a4c0) at .moc/release- shared/ moc_qdbuspendin gcall.cpp: 92 :InvokeMetaMeth od, _id=<value optimized out>, _a=0x257b640) at qdbuspendingcal l.cpp:482 lWatcher: :qt_metacall (this=0x1d8a4c0, _c=QMetaObject: :InvokeMetaMeth od, _id=<value optimized out>, _a=0x257b640) at .moc/release- shared/ moc_qdbuspendin gcall.cpp: 80 qobject. cpp:1219 vate::notify_ helper (this=0x126bbb0, receiver=0x1d8a4c0, e=0x2754e20) at kernel/ qapplication. cpp:4396 :notify (this=0x1254660, receiver=0x1d8a4c0, e=0x2754e20) at kernel/ qapplication. cpp:4277 :notify (this=0x1254660, receiver=0x1d8a4c0, event=0x2754e20) at ../../kdeui/ kernel/ kapplication. cpp:310 n::notifyIntern al (this=0x1254660, receiver=0x1d8a4c0, event=0x2754e20) at kernel/ qcoreapplicatio n.cpp:732 QtCore/ ../../src/ corelib/ kernel/ qcoreapplicatio n.h:215 nPrivate: :sendPostedEven ts (receiver=0x0, event_type=<value optimized out>, data=0x1239560) at kernel/ qcoreapplicatio n.cpp:1373 QtCore/ ../../src/ corelib/ kernel/ qcoreapplicatio n.h:220 Dispatch (s=0x126f250) at kernel/ qeventdispatche r_glib. cpp:277 buildd/ glib2.0- 2.26.0/ glib/gmain. c:2149 context_ dispatch (context=0x126e1f0) at /build/ buildd/ glib2.0- 2.26.0/ glib/gmain. c:2702 context_ iterate (context=0x126e1f0, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at /build/ buildd/ glib2.0- 2.26.0/ glib/gmain. c:2780 context_ iteration (context=0x126e1f0, may_block=1) at /build/ buildd/ glib2.0- 2.26.0/ glib/gmain. c:2843 rGlib:: processEvents (this=0x1239070, flags=<value optimized out>) at kernel/ qeventdispatche r_glib. cpp:415 cherGlib: :processEvents (this=0x22e5600, flags=<value optimized out>) at kernel/ qguieventdispat cher_glib. cpp:204 :processEvents (this=<value optimized out>, flags=) at kernel/ qeventloop. cpp:149 82cc0, flags=) at kernel/ qeventloop. cpp:201 n::exec () at kernel/ qcoreapplicatio n.cpp:1009 ./../plasma/ desktop/ shell/main. cpp:118 0x7fffc1683088) at libc-start.c:226
[KCrash Handler]
#6 findActionItemF
#7 removeAction (this=0x22e5600, event=<value optimized out>) at /build/
#8 ServerItem:
#9 0x00007ff462229507 in QCoreApplicatio
#10 0x00007ff461373fac in QApplicationPri
#11 0x00007ff461379aed in QApplication:
#12 0x00007ff462ec5156 in KApplication:
#13 0x00007ff462229cdc in QCoreApplicatio
#14 0x00007ff4613bfbf1 in sendEvent (this=0x278ed00, action=0x265f900) at ../../include/
#15 QWidget:
#16 0x00007ff4617d4350 in QMenu::clear (this=<value optimized out>) at widgets/
#17 0x00007ff45ab42324 in DBusMenuImporte
#18 0x00007ff45ab41315 in DBusMenuImporte
#19 0x00007ff45ab459dc in DBusMenuImporte
#20 0x00007ff462241b27 in QMetaObject:
#21 0x00007ff4625ba37f in QDBusPendingCal
#22 0x00007ff4625ba409 in _q_finished (this=0x1d8a4c0, _c=QMetaObject:
#23 QDBusPendingCal
#24 0x00007ff46223bbde in QObject::event (this=0x1d8a4c0, e=0x22e5600) at kernel/
#25 0x00007ff461373fdc in QApplicationPri
#26 0x00007ff461379aed in QApplication:
#27 0x00007ff462ec5156 in KApplication:
#28 0x00007ff462229cdc in QCoreApplicatio
#29 0x00007ff46222cc22 in sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x1239560) at ../../include/
#30 QCoreApplicatio
#31 0x00007ff462256653 in sendPostedEvents (s=0x126f250) at ../../include/
#32 postEventSource
#33 0x00007ff45981b342 in g_main_dispatch (context=0x126e1f0) at /build/
#34 g_main_
#35 0x00007ff45981f2a8 in g_main_
#36 0x00007ff45981f45c in g_main_
#37 0x00007ff462256193 in QEventDispatche
#38 0x00007ff461426a4e in QGuiEventDispat
#39 0x00007ff462228a02 in QEventLoop:
#40 0x00007ff462228dec in QEventLoop::exec (this=0x7fffc16
#41 0x00007ff46222cebb in QCoreApplicatio
#42 0x00007ff464e84a56 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../.
#43 0x00007ff464ae5d8e in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=
#44 0x0000000000400669 in _start ()