Application: plasma-desktop (4.11.2)
KDE Platform Version: 4.11.2
Qt Version: 4.8.2
Operating System: Linux 3.2.0-54-generic x86_64
Distribution: Ubuntu 12.04.3 LTS

-- Information about the crash:
- What I was doing when the application crashed:
Lgging in.
- Unusual behavior I noticed:
Completely black desktop. Window management normal.
- Custom settings of the application:
Remember the Milk widget installed but not logged in.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fcb1fff1780 (LWP 5578))]

Thread 9 (Thread 0x7fcafca67700 (LWP 5581)):
#0  0x00007fff0bdff8de in ?? ()
#1  0x00007fcb1504615d in __GI_clock_gettime (clock_id=<optimized out>, tp=<optimized out>) at ../sysdeps/unix/clock_gettime.c:116
#2  0x00007fcb1c36fc84 in do_gettime (frac=0x7fcafca66b98, sec=0x7fcafca66b90) at tools/qelapsedtimer_unix.cpp:123
#3  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#4  0x00007fcb1c44808d in QTimerInfoList::updateCurrentTime (this=0x7fcaf8002860) at kernel/qeventdispatcher_unix.cpp:343
#5  0x00007fcb1c4483c3 in QTimerInfoList::timerWait (this=0x7fcaf8002860, tm=...) at kernel/qeventdispatcher_unix.cpp:450
#6  0x00007fcb1c446e7c in timerSourcePrepareHelper (src=<optimized out>, timeout=0x7fcafca66c6c) at kernel/qeventdispatcher_glib.cpp:136
#7  0x00007fcb1c446f25 in timerSourcePrepare (source=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#8  0x00007fcb1338a846 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007fcb1338af5b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007fcb1338b164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007fcb1c447926 in QEventDispatcherGlib::processEvents (this=0x7fcaf80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#12 0x00007fcb1c416e62 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#13 0x00007fcb1c4170b7 in QEventLoop::exec (this=0x7fcafca66dd0, flags=...) at kernel/qeventloop.cpp:204
#14 0x00007fcb1c316077 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#15 0x00007fcb1c3f6b6f in QInotifyFileSystemWatcherEngine::run (this=0x21f4450) at io/qfilesystemwatcher_inotify.cpp:248
#16 0x00007fcb1c31909b in QThreadPrivate::start (arg=0x21f4450) at thread/qthread_unix.cpp:307
#17 0x00007fcb13a87e9a in start_thread (arg=0x7fcafca67700) at pthread_create.c:308
#18 0x00007fcb1f8dfccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#19 0x0000000000000000 in ?? ()

Thread 8 (Thread 0x7fcae948d700 (LWP 5591)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fcb1a8e1dec in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007fcb1a8e1f19 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007fcb13a87e9a in start_thread (arg=0x7fcae948d700) at pthread_create.c:308
#4  0x00007fcb1f8dfccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 7 (Thread 0x7fcae8b8c700 (LWP 5602)):
#0  0x00007fcb1f8d4313 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fcb1338b036 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcb1338b164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fcb1c447926 in QEventDispatcherGlib::processEvents (this=0x7fcae40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007fcb1c416e62 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fcb1c4170b7 in QEventLoop::exec (this=0x7fcae8b8be00, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fcb1c316077 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007fcb1c31909b in QThreadPrivate::start (arg=0x25e0950) at thread/qthread_unix.cpp:307
#8  0x00007fcb13a87e9a in start_thread (arg=0x7fcae8b8c700) at pthread_create.c:308
#9  0x00007fcb1f8dfccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7fcae1b96700 (LWP 5611)):
#0  0x00007fcb1f8d4313 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fcb1338b036 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcb1338b49a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fcae2680406 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fcb133ac9e5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fcb13a87e9a in start_thread (arg=0x7fcae1b96700) at pthread_create.c:308
#6  0x00007fcb1f8dfccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7fcae1395700 (LWP 5612)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fcb191fa022 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007fcb191fa059 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007fcb13a87e9a in start_thread (arg=0x7fcae1395700) at pthread_create.c:308
#4  0x00007fcb1f8dfccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fcad92ea700 (LWP 5673)):
#0  0x00007fcb1f8d4313 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fcb1338b036 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcb1338b164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fcb1c447926 in QEventDispatcherGlib::processEvents (this=0x7fca500008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007fcb1c416e62 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fcb1c4170b7 in QEventLoop::exec (this=0x7fcad92e9dd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fcb1c316077 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007fcb1c3f6b6f in QInotifyFileSystemWatcherEngine::run (this=0x2d32a30) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fcb1c31909b in QThreadPrivate::start (arg=0x2d32a30) at thread/qthread_unix.cpp:307
#9  0x00007fcb13a87e9a in start_thread (arg=0x7fcad92ea700) at pthread_create.c:308
#10 0x00007fcb1f8dfccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fcae2397700 (LWP 5814)):
#0  0x00007fcb13a8b05d in __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x7fcadc00ccc0) at pthread_mutex_unlock.c:290
#2  0x00007fcb133c65d1 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fcb1338a1f8 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fcb1338af04 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fcb1338b164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fcb1c447926 in QEventDispatcherGlib::processEvents (this=0x7fcadc00c880, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#7  0x00007fcb1c416e62 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007fcb1c4170b7 in QEventLoop::exec (this=0x7fcae2396e00, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007fcb1c316077 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#10 0x00007fcb1c31909b in QThreadPrivate::start (arg=0x3aaab50) at thread/qthread_unix.cpp:307
#11 0x00007fcb13a87e9a in start_thread (arg=0x7fcae2397700) at pthread_create.c:308
#12 0x00007fcb1f8dfccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fca4d39e700 (LWP 5815)):
#0  0x00007fcb13a89fc0 in __pthread_mutex_lock (mutex=0x7fca400026c0) at pthread_mutex_lock.c:113
#1  0x00007fcb133c65a1 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcb1338a337 in g_main_context_release () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fcb1338afe9 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fcb1338b164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fcb1c447926 in QEventDispatcherGlib::processEvents (this=0x7fca400013c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007fcb1c416e62 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fcb1c4170b7 in QEventLoop::exec (this=0x7fca4d39de00, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007fcb1c316077 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x00007fcb1c31909b in QThreadPrivate::start (arg=0x234b170) at thread/qthread_unix.cpp:307
#10 0x00007fcb13a87e9a in start_thread (arg=0x7fca4d39e700) at pthread_create.c:308
#11 0x00007fcb1f8dfccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fcb1fff1780 (LWP 5578)):
[KCrash Handler]
#6  0x00007fca4d9ee513 in isEmpty (this=0x0) at /usr/include/qt4/QtCore/qstring.h:705
#7  RTM::Auth::getAuthUrl (this=0x32a51a0) at ../../../libs/rtm/auth.cpp:80
#8  0x00007fca4d9dfef5 in RTM::Session::handleValidToken (this=0x32a4df0, valid=false) at ../../../libs/rtm/session.cpp:131
#9  0x00007fca4d9e25dc in qt_static_metacall (_a=<optimized out>, _id=<optimized out>, _o=<optimized out>, _c=<optimized out>) at ./moc_session.cpp:114
#10 RTM::Session::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./moc_session.cpp:93
#11 0x00007fcb1c42c781 in QMetaObject::activate (sender=0x32a4df0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff0bdd03d0) at kernel/qobject.cpp:3547
#12 0x00007fca4d9e0992 in RTM::Session::tokenCheck (this=<optimized out>, _t1=false) at ./moc_session.cpp:185
#13 0x00007fca4d9e09cf in RTM::Session::checkToken (this=0x32a4df0) at ../../../libs/rtm/session.cpp:152
#14 0x00007fca4d9e21bc in RTM::Session::Session (this=0x32a4df0, apiKey=..., sharedSecret=..., permissions=RTM::Delete, token=..., parent=<optimized out>) at ../../../libs/rtm/session.cpp:53
#15 0x00007fca4dc02b0c in RtmEngine::RtmEngine (this=0x329da00, parent=<optimized out>, args=...) at ../../../dataengines/rememberthemilk/rtmengine.cpp:51
#16 0x00007fca4dc036a7 in KPluginFactory::createInstance<RtmEngine, QObject> (parentWidget=<optimized out>, parent=<optimized out>, args=...) at /usr/include/kpluginfactory.h:477
#17 0x00007fcb1cc0e961 in KPluginFactory::create (this=0x327b7e0, iface=0x7fcb1f56a120 "Plasma::DataEngine", parentWidget=0x0, parent=0x0, args=..., keyword=...) at ../../kdecore/util/kpluginfactory.cpp:203
#18 0x00007fcb1f40a82c in create<Plasma::DataEngine> (keyword=..., parent=0x0, this=0x327b7e0, args=..., parentWidget=0x0) at ../../kdecore/util/kpluginfactory.h:531
#19 createInstance<Plasma::DataEngine> (error=0x7fff0bdd0730, args=..., parent=0x0, parentWidget=0x0, this=0x329a560) at ../../kdecore/services/kservice.h:573
#20 createInstance<Plasma::DataEngine> (error=0x7fff0bdd0730, args=..., parent=0x0, this=0x329a560) at ../../kdecore/services/kservice.h:550
#21 Plasma::PluginLoader::loadDataEngine (this=<optimized out>, name=...) at ../../plasma/pluginloader.cpp:184
#22 0x00007fcb1f3f28c0 in Plasma::DataEngineManager::loadEngine (this=0x20f5660, name=...) at ../../plasma/dataenginemanager.cpp:132
#23 0x00007fcb1f429223 in Plasma::DataEngineConsumer::dataEngine (this=0x252c1c0, name=...) at ../../plasma/private/dataengineconsumer.cpp:105
#24 0x00007fcb1f3b63bc in Plasma::Applet::dataEngine (this=0x25e1340, name=...) at ../../plasma/applet.cpp:685
#25 0x00007fcae949e969 in graphicsWidget (this=0x25e1340) at ../../../applets/rememberthemilk/rememberthemilk-plasmoid.cpp:317
#26 RememberTheMilkPlasmoid::graphicsWidget (this=0x25e1340) at ../../../applets/rememberthemilk/rememberthemilk-plasmoid.cpp:313
#27 0x00007fcae949e748 in RememberTheMilkPlasmoid::init (this=0x25e1340) at ../../../applets/rememberthemilk/rememberthemilk-plasmoid.cpp:88
#28 0x00007fcb1f3d5045 in Plasma::ContainmentPrivate::initApplets (this=0x259cfa0) at ../../plasma/containment.cpp:460
#29 0x00007fcb1f3e9582 in Plasma::CoronaPrivate::importLayout (this=0x1cee620, conf=..., mergeConfig=false) at ../../plasma/corona.cpp:1067
#30 0x00007fcb1f3ea224 in Plasma::Corona::loadLayout (this=0x1cfc330, configName=...) at ../../plasma/corona.cpp:278
#31 0x00007fcb1f3ea2ec in Plasma::Corona::initializeLayout (this=0x1cfc330, configName=...) at ../../plasma/corona.cpp:181
#32 0x00007fcb1fc03929 in PlasmaApp::corona (this=0x1b789f0, createIfMissing=<optimized out>) at ../../../../plasma/desktop/shell/plasmaapp.cpp:856
#33 0x00007fcb1fc03c3f in PlasmaApp::setupDesktop (this=0x1b789f0) at ../../../../plasma/desktop/shell/plasmaapp.cpp:314
#34 0x00007fcb1fc04fb6 in qt_static_metacall (_a=<optimized out>, _id=<optimized out>, _o=0x1b789f0, _c=<optimized out>) at ./plasmaapp.moc:129
#35 PlasmaApp::qt_static_metacall (_o=0x1b789f0, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./plasmaapp.moc:103
#36 0x00007fcb1c431946 in QObject::event (this=0x1b789f0, e=<optimized out>) at kernel/qobject.cpp:1195
#37 0x00007fcb1b79d604 in QApplication::event (this=0x1b789f0, e=0x1cf6bc0) at kernel/qapplication.cpp:2538
#38 0x00007fcb1b7997b4 in notify_helper (e=0x1cf6bc0, receiver=0x1b789f0, this=0x1b85220) at kernel/qapplication.cpp:4556
#39 QApplicationPrivate::notify_helper (this=0x1b85220, receiver=0x1b789f0, e=0x1cf6bc0) at kernel/qapplication.cpp:4528
#40 0x00007fcb1b79e583 in QApplication::notify (this=0x1b789f0, receiver=0x1b789f0, e=0x1cf6bc0) at kernel/qapplication.cpp:4417
#41 0x00007fcb1d0fde36 in KApplication::notify (this=0x1b789f0, receiver=0x1b789f0, event=0x1cf6bc0) at ../../kdeui/kernel/kapplication.cpp:311
#42 0x00007fcb1c41832c in QCoreApplication::notifyInternal (this=0x1b789f0, receiver=0x1b789f0, event=0x1cf6bc0) at kernel/qcoreapplication.cpp:915
#43 0x00007fcb1c41c10a in sendEvent (event=0x1cf6bc0, receiver=0x1b789f0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#44 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x1b011f0) at kernel/qcoreapplication.cpp:1539
#45 0x00007fcb1c447493 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#46 postEventSourceDispatch (s=<optimized out>) at kernel/qeventdispatcher_glib.cpp:279
#47 0x00007fcb1338ad53 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#48 0x00007fcb1338b0a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#49 0x00007fcb1338b164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#50 0x00007fcb1c4478bf in QEventDispatcherGlib::processEvents (this=0x1b02ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#51 0x00007fcb1b841cde in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#52 0x00007fcb1c416e62 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#53 0x00007fcb1c4170b7 in QEventLoop::exec (this=0x7fff0bdd1de0, flags=...) at kernel/qeventloop.cpp:204
#54 0x00007fcb1c41c407 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#55 0x00007fcb1fbe8fbf in kdemain (argc=1, argv=0x7fff0bdd21c8) at ../../../../plasma/desktop/shell/main.cpp:126
#56 0x00007fcb1f80d76d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff0bdd21c8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff0bdd21b8) at libc-start.c:226
#57 0x0000000000400671 in _start ()

The reporter indicates this bug may be a duplicate of or related to bug 315414.

Possible duplicates by query: bug 324921, bug 322724, bug 321321, bug 315414, bug 314668.

Reported using DrKonqi