Bug 348251

Application: plasma-desktop (4.11.11)
KDE Platform Version: 4.14.2
Qt Version: 4.8.6
Operating System: Linux 3.13.0-37-generic x86_64
Distribution: Linux Mint 17.1 Rebecca

-- Information about the crash:
- What I was doing when the application crashed:
I tried to login several times, always with the same result: the desktop was not fully loaded (couldn't see the background or main menu), always showing me that plasma was using quite a lot of CPU (12% or so, looking like one thread in my 8-threaded machine). After killing plasma by ctr-alt-backspace and login in again, the same happened. The third time I got this crash report assistant, thankfully.

The crash can be reproduced every time.

-- 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 0x7fa39cff97c0 (LWP 3844))]

Thread 7 (Thread 0x7fa37516e700 (LWP 3845)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fa39786f81d in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007fa39786f859 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007fa390823182 in start_thread (arg=0x7fa37516e700) at pthread_create.c:312
#4  0x00007fa39c8ee47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7fa330448700 (LWP 3846)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fa395cacffb in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007fa395cad039 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007fa390823182 in start_thread (arg=0x7fa330448700) at pthread_create.c:312
#4  0x00007fa39c8ee47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7fa2aaed9700 (LWP 3849)):
#0  0x00007fa39015361a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fa390153979 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa3901110b0 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa390111ea5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa3901120ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fa3994c27be in QEventDispatcherGlib::processEvents (this=0x7fa2a40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0x00007fa3994940af in QEventLoop::processEvents (this=this@entry=0x7fa2aaed8e20, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fa3994943a5 in QEventLoop::exec (this=this@entry=0x7fa2aaed8e20, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007fa399390c5f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:537
#9  0x00007fa39939332f in QThreadPrivate::start (arg=0x2d74bb0) at thread/qthread_unix.cpp:349
#10 0x00007fa390823182 in start_thread (arg=0x7fa2aaed9700) at pthread_create.c:312
#11 0x00007fa39c8ee47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7fa29bb8e700 (LWP 3852)):
#0  0x00007fa39015361d in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fa3901539a9 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa390111a59 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa390111f7b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa3901120ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fa3994c27be in QEventDispatcherGlib::processEvents (this=0x7fa2940008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0x00007fa3994940af in QEventLoop::processEvents (this=this@entry=0x7fa29bb8dde0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fa3994943a5 in QEventLoop::exec (this=this@entry=0x7fa29bb8dde0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007fa399390c5f in QThread::exec (this=this@entry=0x2dcdf40) at thread/qthread.cpp:537
#9  0x00007fa399475823 in QInotifyFileSystemWatcherEngine::run (this=0x2dcdf40) at io/qfilesystemwatcher_inotify.cpp:265
#10 0x00007fa39939332f in QThreadPrivate::start (arg=0x2dcdf40) at thread/qthread_unix.cpp:349
#11 0x00007fa390823182 in start_thread (arg=0x7fa29bb8e700) at pthread_create.c:312
#12 0x00007fa39c8ee47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7fa2a9a21700 (LWP 4062)):
#0  __GI___pthread_mutex_lock (mutex=0x0) at ../nptl/pthread_mutex_lock.c:63
#1  0x00007fa390153981 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa390111699 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa390111f03 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa3901120ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fa3994c27be in QEventDispatcherGlib::processEvents (this=0x7fa29c009a30, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0x00007fa3994940af in QEventLoop::processEvents (this=this@entry=0x7fa2a9a20e20, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fa3994943a5 in QEventLoop::exec (this=this@entry=0x7fa2a9a20e20, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007fa399390c5f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:537
#9  0x00007fa39939332f in QThreadPrivate::start (arg=0x2b4c020) at thread/qthread_unix.cpp:349
#10 0x00007fa390823182 in start_thread (arg=0x7fa2a9a21700) at pthread_create.c:312
#11 0x00007fa39c8ee47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7fa287d20700 (LWP 4064)):
#0  0x00007fa39c8e112d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa390111fe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa3901120ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa3994c27be in QEventDispatcherGlib::processEvents (this=0x7fa2800008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#4  0x00007fa3994940af in QEventLoop::processEvents (this=this@entry=0x7fa287d1fe20, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fa3994943a5 in QEventLoop::exec (this=this@entry=0x7fa287d1fe20, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fa399390c5f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:537
#7  0x00007fa39939332f in QThreadPrivate::start (arg=0x1cab460) at thread/qthread_unix.cpp:349
#8  0x00007fa390823182 in start_thread (arg=0x7fa287d20700) at pthread_create.c:312
#9  0x00007fa39c8ee47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7fa39cff97c0 (LWP 3844)):
[KCrash Handler]
#6  0x00007fa2aaeefab3 in isEmpty (this=0x0) at /usr/include/qt4/QtCore/qstring.h:705
#7  RTM::Auth::getAuthUrl (this=this@entry=0x2d75cc0) at ../../../libs/rtm/auth.cpp:80
#8  0x00007fa2aaee20be in RTM::Session::handleValidToken (this=0x2d76260, valid=<optimized out>) at ../../../libs/rtm/session.cpp:131
#9  0x00007fa2aaee51ce in RTM::Session::qt_static_metacall (_o=0x1a6eea0, _id=0, _a=0x0, _c=<optimized out>) at ./moc_session.cpp:113
#10 0x00007fa3994a987a in QMetaObject::activate (sender=sender@entry=0x2d76260, m=m@entry=0x7fa2ab0fa9e0 <RTM::Session::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7fffe90d7890) at kernel/qobject.cpp:3539
#11 0x00007fa2aaee26a2 in RTM::Session::tokenCheck (this=this@entry=0x2d76260, _t1=_t1@entry=false) at ./moc_session.cpp:184
#12 0x00007fa2aaee26d6 in RTM::Session::checkToken (this=0x2d76260) at ../../../libs/rtm/session.cpp:152
#13 0x00007fa2aaee3bae in RTM::Session::Session (this=0x2d76260, apiKey=..., sharedSecret=..., permissions=RTM::Delete, token=..., parent=<optimized out>) at ../../../libs/rtm/session.cpp:53
#14 0x00007fa2ab10396c in RtmEngine::RtmEngine (this=0x2d765c0, parent=<optimized out>, args=...) at ../../../dataengines/rememberthemilk/rtmengine.cpp:51
#15 0x00007fa2ab1043d8 in KPluginFactory::createInstance<RtmEngine, QObject> (parentWidget=<optimized out>, parent=<optimized out>, args=...) at /usr/include/kpluginfactory.h:477
#16 0x00007fa399c766c3 in KPluginFactory::create (this=0x2d74440, iface=0x7fa39c567b60 <qt_meta_stringdata_Plasma__DataEngine> "Plasma::DataEngine", parentWidget=0x0, parent=0x0, args=..., keyword=...) at ../../kdecore/util/kpluginfactory.cpp:203
#17 0x00007fa39c425009 in create<Plasma::DataEngine> (args=..., keyword=..., parent=0x0, parentWidget=0x0, this=0x2d74440) at ../../kdecore/util/kpluginfactory.h:531
#18 createInstance<Plasma::DataEngine> (error=0x7fffe90d7b10, args=..., parent=0x0, parentWidget=0x0, this=0x2d6ea20) at ../../kdecore/services/kservice.h:573
#19 createInstance<Plasma::DataEngine> (error=0x7fffe90d7b10, args=..., parent=0x0, this=0x2d6ea20) at ../../kdecore/services/kservice.h:550
#20 Plasma::PluginLoader::loadDataEngine (this=<optimized out>, name=...) at ../../plasma/pluginloader.cpp:184
#21 0x00007fa39c40eeb0 in Plasma::DataEngineManager::loadEngine (this=0x1e5fbd0, name=...) at ../../plasma/dataenginemanager.cpp:132
#22 0x00007fa39c44022b in Plasma::DataEngineConsumer::dataEngine (this=0x1e9da30, name=...) at ../../plasma/private/dataengineconsumer.cpp:105
#23 0x00007fa39c3d784c in Plasma::Applet::dataEngine (this=this@entry=0x1e9bff0, name=...) at ../../plasma/applet.cpp:685
#24 0x00007fa375180886 in RememberTheMilkPlasmoid::graphicsWidget (this=0x1e9bff0) at ../../../applets/rememberthemilk/rememberthemilk-plasmoid.cpp:317
#25 0x00007fa3751811e4 in RememberTheMilkPlasmoid::init (this=0x1e9bff0) at ../../../applets/rememberthemilk/rememberthemilk-plasmoid.cpp:88
#26 0x00007fa39c3fab7c in Plasma::ContainmentPrivate::initApplets (this=0x1cbde00) at ../../plasma/containment.cpp:460
#27 0x00007fa39c407a4c in Plasma::CoronaPrivate::importLayout (this=0x1bd74e0, conf=..., mergeConfig=mergeConfig@entry=false) at ../../plasma/corona.cpp:1070
#28 0x00007fa39c40844a in Plasma::Corona::loadLayout (this=this@entry=0x1bd9c40, configName=...) at ../../plasma/corona.cpp:281
#29 0x00007fa39c408504 in Plasma::Corona::initializeLayout (this=this@entry=0x1bd9c40, configName=...) at ../../plasma/corona.cpp:182
#30 0x00007fa39cc0a33a in PlasmaApp::corona (this=this@entry=0x1a8ba40, createIfMissing=createIfMissing@entry=true) at ../../../../plasma/desktop/shell/plasmaapp.cpp:856
#31 0x00007fa39cc0a945 in PlasmaApp::setupDesktop (this=0x1a8ba40) at ../../../../plasma/desktop/shell/plasmaapp.cpp:314
#32 0x00007fa39cc0eca5 in PlasmaApp::qt_static_metacall (_o=0x1a8ba40, _id=0, _a=0x0, _c=<optimized out>) at ./plasmaapp.moc:128
#33 0x00007fa3994adc1e in QObject::event (this=this@entry=0x1a8ba40, e=e@entry=0x1bc3f90) at kernel/qobject.cpp:1194
#34 0x00007fa399499cfc in QCoreApplication::event (this=this@entry=0x1a8ba40, e=e@entry=0x1bc3f90) at kernel/qcoreapplication.cpp:1765
#35 0x00007fa398833ed3 in QApplication::event (this=0x1a8ba40, e=0x1bc3f90) at kernel/qapplication.cpp:2549
#36 0x00007fa39882ee2c in QApplicationPrivate::notify_helper (this=this@entry=0x1a98d80, receiver=receiver@entry=0x1a8ba40, e=e@entry=0x1bc3f90) at kernel/qapplication.cpp:4567
#37 0x00007fa3988354a0 in QApplication::notify (this=this@entry=0x1a8ba40, receiver=receiver@entry=0x1a8ba40, e=e@entry=0x1bc3f90) at kernel/qapplication.cpp:4353
#38 0x00007fa39a15acca in KApplication::notify (this=0x1a8ba40, receiver=0x1a8ba40, event=0x1bc3f90) at ../../kdeui/kernel/kapplication.cpp:311
#39 0x00007fa3994954dd in QCoreApplication::notifyInternal (this=0x1a8ba40, receiver=receiver@entry=0x1a8ba40, event=event@entry=0x1bc3f90) at kernel/qcoreapplication.cpp:953
#40 0x00007fa399498b3d in sendEvent (event=0x1bc3f90, receiver=0x1a8ba40) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#41 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1a16090) at kernel/qcoreapplication.cpp:1577
#42 0x00007fa399498fe3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#43 0x00007fa3994c2f83 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#44 postEventSourceDispatch (s=0x1a991b0) at kernel/qeventdispatcher_glib.cpp:287
#45 0x00007fa390111e04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#46 0x00007fa390112048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#47 0x00007fa3901120ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#48 0x00007fa3994c27a1 in QEventDispatcherGlib::processEvents (this=0x1a900e0, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#49 0x00007fa3988d0bb6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#50 0x00007fa3994940af in QEventLoop::processEvents (this=this@entry=0x7fffe90d8940, flags=...) at kernel/qeventloop.cpp:149
#51 0x00007fa3994943a5 in QEventLoop::exec (this=this@entry=0x7fffe90d8940, flags=...) at kernel/qeventloop.cpp:204
#52 0x00007fa399499b79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#53 0x00007fa39882d37c in QApplication::exec () at kernel/qapplication.cpp:3828
#54 0x00007fa39cbf567c in kdemain (argc=1, argv=0x7fffe90d8b98) at ../../../../plasma/desktop/shell/main.cpp:126
#55 0x00007fa39c815ec5 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=1, argv=0x7fffe90d8b98, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffe90d8b88) at libc-start.c:287
#56 0x000000000040070e in _start ()

Reported using DrKonqi