Bug 349568

Application: plasma-desktop (4.11.19)
KDE Platform Version: 4.14.8
Qt Version: 4.8.6
Operating System: Linux 3.16.7-21-desktop x86_64
Distribution: "openSUSE 13.2 (Harlequin) (x86_64)"

-- Information about the crash:
- Unusual behavior I noticed: My screen was black but I could see the mouse pointer. I could also start different applications using keyboard shortcuts.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f1d57ef4780 (LWP 1497))]

Thread 5 (Thread 0x7f1d2fba1700 (LWP 1500)):
#0  0x00007f1d567ab05f in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f1d490388cb in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f1d49336f00 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f1d49038909 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f1d567a70a4 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f1d5551408d in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f1caacef700 (LWP 1501)):
#0  0x00007f1d567ab05f in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f1d4abca686 in WTF::TCMalloc_PageHeap::scavengerThread() () from /usr/lib64/libQtWebKit.so.4
#2  0x00007f1d4abca6b9 in WTF::TCMalloc_PageHeap::runScavengerThread(void*) () from /usr/lib64/libQtWebKit.so.4
#3  0x00007f1d567a70a4 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f1d5551408d in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f1c63919700 (LWP 1502)):
#0  0x00007f1d5550bc5d in poll () from /lib64/libc.so.6
#1  0x00007f1d5261ebe4 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f1d5261ecec in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f1d56b6c0de in QEventDispatcherGlib::processEvents (this=0x7f1c5c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#4  0x00007f1d56b3de6f in QEventLoop::processEvents (this=this@entry=0x7f1c63918e60, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f1d56b3e165 in QEventLoop::exec (this=this@entry=0x7f1c63918e60, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f1d56a3b0bf in QThread::exec (this=<optimized out>) at thread/qthread.cpp:538
#7  0x00007f1d56a3d79f in QThreadPrivate::start (arg=0x17a1520) at thread/qthread_unix.cpp:349
#8  0x00007f1d567a70a4 in start_thread () from /lib64/libpthread.so.0
#9  0x00007f1d5551408d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f1c62297700 (LWP 1889)):
#0  0x00007f1d5261e26b in g_main_context_prepare () from /usr/lib64/libglib-2.0.so.0
#1  0x00007f1d5261eb03 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f1d5261ecec in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f1d56b6c0de in QEventDispatcherGlib::processEvents (this=0x7f1c58002e80, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#4  0x00007f1d56b3de6f in QEventLoop::processEvents (this=this@entry=0x7f1c62296e60, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f1d56b3e165 in QEventLoop::exec (this=this@entry=0x7f1c62296e60, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f1d56a3b0bf in QThread::exec (this=<optimized out>) at thread/qthread.cpp:538
#7  0x00007f1d56a3d79f in QThreadPrivate::start (arg=0x1c1fe20) at thread/qthread_unix.cpp:349
#8  0x00007f1d567a70a4 in start_thread () from /lib64/libpthread.so.0
#9  0x00007f1d5551408d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f1d57ef4780 (LWP 1497)):
[KCrash Handler]
#6  0x00007f1c63930343 in isEmpty (this=0x3034343b34333831) at /usr/include/QtCore/qstring.h:705
#7  RTM::Auth::getAuthUrl (this=this@entry=0x1791b70) at /usr/src/debug/kdeplasma-addons-4.14.3/libs/rtm/auth.cpp:80
#8  0x00007f1c63922a3e in RTM::Session::handleValidToken (this=0x17a99b0, valid=<optimized out>) at /usr/src/debug/kdeplasma-addons-4.14.3/libs/rtm/session.cpp:131
#9  0x00007f1c63925ace in RTM::Session::qt_static_metacall (_o=0xd464f0, _id=1, _a=0x3034343b34333831, _c=<optimized out>) at /usr/src/debug/kdeplasma-addons-4.14.3/build/libs/rtm/moc_session.cpp:113
#10 0x00007f1d56b531fa in QMetaObject::activate (sender=sender@entry=0x17a99b0, m=m@entry=0x7f1c63b3b9e0 <RTM::Session::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffef6131460) at kernel/qobject.cpp:3576
#11 0x00007f1c63923022 in RTM::Session::tokenCheck (this=this@entry=0x17a99b0, _t1=_t1@entry=false) at /usr/src/debug/kdeplasma-addons-4.14.3/build/libs/rtm/moc_session.cpp:184
#12 0x00007f1c63923056 in RTM::Session::checkToken (this=0x17a99b0) at /usr/src/debug/kdeplasma-addons-4.14.3/libs/rtm/session.cpp:152
#13 0x00007f1c639244ea in RTM::Session::Session (this=0x17a99b0, apiKey=..., sharedSecret=..., permissions=RTM::Delete, token=..., parent=<optimized out>) at /usr/src/debug/kdeplasma-addons-4.14.3/libs/rtm/session.cpp:53
#14 0x00007f1c63b44e7c in RtmEngine::RtmEngine (this=0x1796060, parent=<optimized out>, args=...) at /usr/src/debug/kdeplasma-addons-4.14.3/dataengines/rememberthemilk/rtmengine.cpp:51
#15 0x00007f1c63b45858 in KPluginFactory::createInstance<RtmEngine, QObject> (parentWidget=<optimized out>, parent=<optimized out>, args=...) at /usr/include/kpluginfactory.h:477
#16 0x00007f1d570ad553 in KPluginFactory::create (this=0x1849c00, iface=0x7f1d4b91f500 <qt_meta_stringdata_Plasma__DataEngine> "Plasma::DataEngine", parentWidget=0x0, parent=0x0, args=..., keyword=...) at /usr/src/debug/kdelibs-4.14.8/kdecore/util/kpluginfactory.cpp:203
#17 0x00007f1d4b7dce69 in create<Plasma::DataEngine> (args=..., keyword=..., parent=0x0, parentWidget=0x0, this=0x1849c00) at /usr/src/debug/kdelibs-4.14.8/kdecore/util/kpluginfactory.h:531
#18 createInstance<Plasma::DataEngine> (error=0x7ffef61316e0, args=..., parent=0x0, parentWidget=0x0, this=0x17dbcd0) at /usr/src/debug/kdelibs-4.14.8/kdecore/services/kservice.h:579
#19 createInstance<Plasma::DataEngine> (error=0x7ffef61316e0, args=..., parent=0x0, this=0x17dbcd0) at /usr/src/debug/kdelibs-4.14.8/kdecore/services/kservice.h:556
#20 Plasma::PluginLoader::loadDataEngine (this=<optimized out>, name=...) at /usr/src/debug/kdelibs-4.14.8/plasma/pluginloader.cpp:184
#21 0x00007f1d4b7c6d40 in Plasma::DataEngineManager::loadEngine (this=0x10016b0, name=...) at /usr/src/debug/kdelibs-4.14.8/plasma/dataenginemanager.cpp:132
#22 0x00007f1d4b7f801b in Plasma::DataEngineConsumer::dataEngine (this=0x1134b10, name=...) at /usr/src/debug/kdelibs-4.14.8/plasma/private/dataengineconsumer.cpp:105
#23 0x00007f1d4b78f79c in Plasma::Applet::dataEngine (this=this@entry=0x1183cd0, name=...) at /usr/src/debug/kdelibs-4.14.8/plasma/applet.cpp:685
#24 0x00007f1caad02996 in RememberTheMilkPlasmoid::graphicsWidget (this=0x1183cd0) at /usr/src/debug/kdeplasma-addons-4.14.3/applets/rememberthemilk/rememberthemilk-plasmoid.cpp:317
#25 0x00007f1caad032f4 in RememberTheMilkPlasmoid::init (this=0x1183cd0) at /usr/src/debug/kdeplasma-addons-4.14.3/applets/rememberthemilk/rememberthemilk-plasmoid.cpp:88
#26 0x00007f1d4b7b2a0c in Plasma::ContainmentPrivate::initApplets (this=0x11bb310) at /usr/src/debug/kdelibs-4.14.8/plasma/containment.cpp:472
#27 0x00007f1d4b7bf8dc in Plasma::CoronaPrivate::importLayout (this=0xe61410, conf=..., mergeConfig=mergeConfig@entry=false) at /usr/src/debug/kdelibs-4.14.8/plasma/corona.cpp:1070
#28 0x00007f1d4b7c02da in Plasma::Corona::loadLayout (this=this@entry=0xea9990, configName=...) at /usr/src/debug/kdelibs-4.14.8/plasma/corona.cpp:281
#29 0x00007f1d4b7c0394 in Plasma::Corona::initializeLayout (this=this@entry=0xea9990, configName=...) at /usr/src/debug/kdelibs-4.14.8/plasma/corona.cpp:182
#30 0x00007f1d415118f5 in PlasmaApp::corona (this=this@entry=0xd2e8f0, createIfMissing=createIfMissing@entry=true) at /usr/src/debug/kde-workspace-4.11.19/plasma/desktop/shell/plasmaapp.cpp:856
#31 0x00007f1d41511f05 in PlasmaApp::setupDesktop (this=0xd2e8f0) at /usr/src/debug/kde-workspace-4.11.19/plasma/desktop/shell/plasmaapp.cpp:314
#32 0x00007f1d41516235 in PlasmaApp::qt_static_metacall (_o=0xd2e8f0, _id=1, _a=0x3034343b34333831, _c=<optimized out>) at /usr/src/debug/kde-workspace-4.11.19/build/plasma/desktop/shell/plasmaapp.moc:128
#33 0x00007f1d56b5759e in QObject::event (this=this@entry=0xd2e8f0, e=e@entry=0xe64390) at kernel/qobject.cpp:1231
#34 0x00007f1d56b4373c in QCoreApplication::event (this=this@entry=0xd2e8f0, e=e@entry=0xe64390) at kernel/qcoreapplication.cpp:1765
#35 0x00007f1d55cc0733 in QApplication::event (this=0xd2e8f0, e=0xe64390) at kernel/qapplication.cpp:2544
#36 0x00007f1d55cbb76c in QApplicationPrivate::notify_helper (this=this@entry=0xd49150, receiver=receiver@entry=0xd2e8f0, e=e@entry=0xe64390) at kernel/qapplication.cpp:4565
#37 0x00007f1d55cc1cad in QApplication::notify (this=this@entry=0xd2e8f0, receiver=receiver@entry=0xd2e8f0, e=e@entry=0xe64390) at kernel/qapplication.cpp:4351
#38 0x00007f1d578e2dca in KApplication::notify (this=0xd2e8f0, receiver=0xd2e8f0, event=0xe64390) at /usr/src/debug/kdelibs-4.14.8/kdeui/kernel/kapplication.cpp:311
#39 0x00007f1d56b3f2ad in QCoreApplication::notifyInternal (this=0xd2e8f0, receiver=receiver@entry=0xd2e8f0, event=event@entry=0xe64390) at kernel/qcoreapplication.cpp:953
#40 0x00007f1d56b4257d in sendEvent (event=0xe64390, receiver=0xd2e8f0) at kernel/qcoreapplication.h:231
#41 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0xc7f490) at kernel/qcoreapplication.cpp:1577
#42 0x00007f1d56b42a23 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#43 0x00007f1d56b6c8fe in sendPostedEvents () at kernel/qcoreapplication.h:236
#44 postEventSourceDispatch (s=0xd50470) at kernel/qeventdispatcher_glib.cpp:300
#45 0x00007f1d5261ea04 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#46 0x00007f1d5261ec48 in ?? () from /usr/lib64/libglib-2.0.so.0
#47 0x00007f1d5261ecec in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#48 0x00007f1d56b6c0be in QEventDispatcherGlib::processEvents (this=0xd44e40, flags=...) at kernel/qeventdispatcher_glib.cpp:450
#49 0x00007f1d55d58676 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#50 0x00007f1d56b3de6f in QEventLoop::processEvents (this=this@entry=0x7ffef6132510, flags=...) at kernel/qeventloop.cpp:149
#51 0x00007f1d56b3e165 in QEventLoop::exec (this=this@entry=0x7ffef6132510, flags=...) at kernel/qeventloop.cpp:204
#52 0x00007f1d56b435b9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#53 0x00007f1d55cb9f3c in QApplication::exec () at kernel/qapplication.cpp:3823
#54 0x00007f1d414fcb94 in kdemain (argc=1, argv=0xc84910) at /usr/src/debug/kde-workspace-4.11.19/plasma/desktop/shell/main.cpp:126
#55 0x0000000000408815 in _start ()

Reported using DrKonqi