Application: plasma-desktop (4.11.16)
KDE Platform Version: 4.14.5
Qt Version: 4.8.5
Operating System: Linux 3.18.5-gentoo x86_64
Distribution: "Gentoo Base System release 2.2"

-- Information about the crash:
- What I was doing when the application crashed:

I used kquitapp to stop plasma-desktop from krunner. Then I enabled all debug messages for plasma with kdebugdialog. When I ran plasma-desktop from krunner, plasma-desktop immediatly crashed.

- Unusual behavior I noticed:

I was trying to figure out frequent freezes of plasma-desktop (while it freezes, its cpu usage is 100% for one core and memory usage increased, up to the point of 4GB when I killed it).

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma-Desktop-Umgebung (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb56f5ab800 (LWP 19200))]

Thread 3 (Thread 0x7fb56074b700 (LWP 19209)):
#0  g_mutex_get_impl (mutex=0x7fb5580030e0) at /var/tmp/portage/dev-libs/glib-2.40.2/work/glib-2.40.2/glib/gthread-posix.c:131
#1  0x00000031c0a8a3e9 in g_mutex_lock (mutex=mutex@entry=0x7fb5580030e0) at /var/tmp/portage/dev-libs/glib-2.40.2/work/glib-2.40.2/glib/gthread-posix.c:209
#2  0x00000031c0a4845b in g_main_context_query (context=context@entry=0x7fb5580030e0, max_priority=2147483647, timeout=timeout@entry=0x7fb56074ac6c, fds=fds@entry=0x7fb558003480, n_fds=n_fds@entry=2) at /var/tmp/portage/dev-libs/glib-2.40.2/work/glib-2.40.2/glib/gmain.c:3453
#3  0x00000031c0a48b32 in g_main_context_iterate (context=context@entry=0x7fb5580030e0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.40.2/work/glib-2.40.2/glib/gmain.c:3716
#4  0x00000031c0a48ccc in g_main_context_iteration (context=0x7fb5580030e0, may_block=1) at /var/tmp/portage/dev-libs/glib-2.40.2/work/glib-2.40.2/glib/gmain.c:3795
#5  0x00000031c17aac8e in QEventDispatcherGlib::processEvents (this=0x7fb558003000, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#6  0x00000031c177c2df in QEventLoop::processEvents (this=this@entry=0x7fb56074ada0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00000031c177c5d5 in QEventLoop::exec (this=this@entry=0x7fb56074ada0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00000031c1678b2f in QThread::exec (this=this@entry=0x4144a50) at thread/qthread.cpp:536
#9  0x00000031c175d383 in QInotifyFileSystemWatcherEngine::run (this=0x4144a50) at io/qfilesystemwatcher_inotify.cpp:256
#10 0x00000031c167b26f in QThreadPrivate::start (arg=0x4144a50) at thread/qthread_unix.cpp:338
#11 0x000000399be080b3 in start_thread (arg=0x7fb56074b700) at pthread_create.c:309
#12 0x000000399b6e8d2d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7fb55705e700 (LWP 19210)):
#0  pthread_cond_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00000031c8f86e37 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x31c9293660 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00000031c8f86e69 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x000000399be080b3 in start_thread (arg=0x7fb55705e700) at pthread_create.c:309
#4  0x000000399b6e8d2d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7fb56f5ab800 (LWP 19200)):
[KCrash Handler]
#6  0x00000031c1783bc7 in QMetaObject::cast (this=0x34fdf0a7e0 <Plasma::Extender::staticMetaObject>, obj=0x31c1ae0000 <vtable for QFutureWatcherBase>) at kernel/qmetaobject.cpp:274
#7  0x00000034fdb62075 in qobject_cast<Plasma::Extender*> (object=<optimized out>) at /usr/include/qt4/QtCore/qobject.h:380
#8  qobject_cast<Plasma::Extender*> (o=<optimized out>) at /usr/include/qt4/QtDeclarative/qdeclarativeitem.h:206
#9  Plasma::PopupAppletPrivate::checkExtenderAppearance (this=this@entry=0x42ea8c0, f=f@entry=Plasma::Planar) at /var/tmp/portage/kde-base/kdelibs-4.14.5/work/kdelibs-4.14.5/plasma/popupapplet.cpp:191
#10 0x00000034fdb64033 in Plasma::PopupAppletPrivate::popupConstraintsEvent (this=0x42ea8c0, constraints=...) at /var/tmp/portage/kde-base/kdelibs-4.14.5/work/kdelibs-4.14.5/plasma/popupapplet.cpp:212
#11 0x00000034fdb0b7e7 in Plasma::Applet::flushPendingConstraintsEvents (this=0x432f6b0) at /var/tmp/portage/kde-base/kdelibs-4.14.5/work/kdelibs-4.14.5/plasma/applet.cpp:1361
#12 0x00007fb55dbcf146 in SystemTray::PlasmoidTask::forwardConstraintsEvent (this=0x31c1ae0000 <vtable for QFutureWatcherBase>, constraints=...) at /var/tmp/portage/kde-base/plasma-workspace-4.11.16/work/plasma-workspace-4.11.16/plasma/generic/applets/systemtray/protocols/plasmoid/plasmoidtask.cpp:126
#13 0x00007fb55dbcdd51 in SystemTray::PlasmoidProtocol::forwardConstraintsEvent (this=0x3f26db0, constraints=..., host=host@entry=0x3f84120) at /var/tmp/portage/kde-base/plasma-workspace-4.11.16/work/plasma-workspace-4.11.16/plasma/generic/applets/systemtray/protocols/plasmoid/plasmoidtaskprotocol.cpp:54
#14 0x00007fb55dbc6599 in SystemTray::Manager::forwardConstraintsEvent (this=<optimized out>, constraints=..., host=host@entry=0x3f84120) at /var/tmp/portage/kde-base/plasma-workspace-4.11.16/work/plasma-workspace-4.11.16/plasma/generic/applets/systemtray/core/manager.cpp:99
#15 0x00007fb55dbd4741 in SystemTray::Applet::constraintsEvent (this=0x3f84120, constraints=...) at /var/tmp/portage/kde-base/plasma-workspace-4.11.16/work/plasma-workspace-4.11.16/plasma/generic/applets/systemtray/ui/applet.cpp:360
#16 0x00000034fdb0b7fd in Plasma::Applet::flushPendingConstraintsEvents (this=0x3f84120) at /var/tmp/portage/kde-base/kdelibs-4.14.5/work/kdelibs-4.14.5/plasma/applet.cpp:1365
#17 0x00000034fdb28168 in Plasma::ContainmentPrivate::initApplets (this=0x3f128f0) at /var/tmp/portage/kde-base/kdelibs-4.14.5/work/kdelibs-4.14.5/plasma/containment.cpp:467
#18 0x00000034fdb34fdc in Plasma::CoronaPrivate::importLayout (this=0x1f60870, conf=..., mergeConfig=mergeConfig@entry=false) at /var/tmp/portage/kde-base/kdelibs-4.14.5/work/kdelibs-4.14.5/plasma/corona.cpp:1070
#19 0x00000034fdb359da in Plasma::Corona::loadLayout (this=this@entry=0x1f53120, configName=...) at /var/tmp/portage/kde-base/kdelibs-4.14.5/work/kdelibs-4.14.5/plasma/corona.cpp:281
#20 0x00000034fdb35a94 in Plasma::Corona::initializeLayout (this=this@entry=0x1f53120, configName=...) at /var/tmp/portage/kde-base/kdelibs-4.14.5/work/kdelibs-4.14.5/plasma/corona.cpp:182
#21 0x00000034ff651325 in PlasmaApp::corona (this=this@entry=0x1e0ac10, createIfMissing=createIfMissing@entry=true) at /var/tmp/portage/kde-base/plasma-workspace-4.11.16/work/plasma-workspace-4.11.16/plasma/desktop/shell/plasmaapp.cpp:856
#22 0x00000034ff651935 in PlasmaApp::setupDesktop (this=0x1e0ac10) at /var/tmp/portage/kde-base/plasma-workspace-4.11.16/work/plasma-workspace-4.11.16/plasma/desktop/shell/plasmaapp.cpp:314
#23 0x00000034ff655c55 in PlasmaApp::qt_static_metacall (_o=0x1e0ac10, _id=-1045561344, _a=0x6, _c=<optimized out>) at /var/tmp/portage/kde-base/plasma-workspace-4.11.16/work/plasma-workspace-4.11.16_build/plasma/desktop/shell/plasmaapp.moc:128
#24 0x00000031c1795c0e in QObject::event (this=this@entry=0x1e0ac10, e=e@entry=0x1f1f8d0) at kernel/qobject.cpp:1194
#25 0x00000031c1781a2c in QCoreApplication::event (this=this@entry=0x1e0ac10, e=e@entry=0x1f1f8d0) at kernel/qcoreapplication.cpp:1761
#26 0x0000003ae59e6de4 in QApplication::event (this=0x1e0ac10, e=0x1f1f8d0) at kernel/qapplication.cpp:2544
#27 0x0000003ae59df32c in QApplicationPrivate::notify_helper (this=this@entry=0x1e259a0, receiver=receiver@entry=0x1e0ac10, e=e@entry=0x1f1f8d0) at kernel/qapplication.cpp:4562
#28 0x0000003ae59e1cb2 in QApplication::notify (this=this@entry=0x1e0ac10, receiver=receiver@entry=0x1e0ac10, e=e@entry=0x1f1f8d0) at kernel/qapplication.cpp:4423
#29 0x00000034fbc3e54a in KApplication::notify (this=0x1e0ac10, receiver=0x1e0ac10, event=0x1f1f8d0) at /var/tmp/portage/kde-base/kdelibs-4.14.5/work/kdelibs-4.14.5/kdeui/kernel/kapplication.cpp:311
#30 0x00000031c177d6ad in QCoreApplication::notifyInternal (this=0x1e0ac10, receiver=receiver@entry=0x1e0ac10, event=event@entry=0x1f1f8d0) at kernel/qcoreapplication.cpp:949
#31 0x00000031c17807ca in sendEvent (event=0x1f1f8d0, receiver=0x1e0ac10) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#32 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1d670d0) at kernel/qcoreapplication.cpp:1573
#33 0x00000031c1780c63 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1466
#34 0x00000031c17ab49e in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#35 postEventSourceDispatch (s=0x1dff9d0) at kernel/qeventdispatcher_glib.cpp:300
#36 0x00000031c0a489e4 in g_main_dispatch (context=0x1e25ce0) at /var/tmp/portage/dev-libs/glib-2.40.2/work/glib-2.40.2/glib/gmain.c:3064
#37 g_main_context_dispatch (context=context@entry=0x1e25ce0) at /var/tmp/portage/dev-libs/glib-2.40.2/work/glib-2.40.2/glib/gmain.c:3663
#38 0x00000031c0a48c28 in g_main_context_iterate (context=context@entry=0x1e25ce0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.40.2/work/glib-2.40.2/glib/gmain.c:3734
#39 0x00000031c0a48ccc in g_main_context_iteration (context=0x1e25ce0, may_block=1) at /var/tmp/portage/dev-libs/glib-2.40.2/work/glib-2.40.2/glib/gmain.c:3795
#40 0x00000031c17aac6e in QEventDispatcherGlib::processEvents (this=0x1d689b0, flags=...) at kernel/qeventdispatcher_glib.cpp:450
#41 0x0000003ae5a7fefe in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#42 0x00000031c177c2df in QEventLoop::processEvents (this=this@entry=0x7fff006c3680, flags=...) at kernel/qeventloop.cpp:149
#43 0x00000031c177c5d5 in QEventLoop::exec (this=this@entry=0x7fff006c3680, flags=...) at kernel/qeventloop.cpp:204
#44 0x00000031c1781899 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1221
#45 0x0000003ae59ddc7c in QApplication::exec () at kernel/qapplication.cpp:3823
#46 0x00000034ff63c654 in kdemain (argc=1, argv=0x7fff006c38d8) at /var/tmp/portage/kde-base/plasma-workspace-4.11.16/work/plasma-workspace-4.11.16/plasma/desktop/shell/main.cpp:126
#47 0x000000399b621b35 in __libc_start_main (main=0x400780 <main(int, char**)>, argc=1, argv=0x7fff006c38d8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff006c38c8) at libc-start.c:285
#48 0x00000000004007ae in _start ()

The reporter indicates this bug may be a duplicate of or related to bug 332866.

Possible duplicates by query: bug 335895, bug 334747, bug 332866.

Reported using DrKonqi