Bug 334674

Application: plasma-desktop (4.11.9)
KDE Platform Version: 4.12.5
Qt Version: 4.8.6
Operating System: Linux 3.14.3-200.fc20.x86_64 x86_64
Distribution: "Fedora release 20 (Heisenbug)"

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

Logged on, desktop appeared, went to black, crashed and restarted. Happened once or twice before.

- OS:
Plain Fedora 20 with closed binary NVidia drivers via RPM Fusion.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Powłoka pulpitu Plazmy (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
81	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[Current thread is 1 (Thread 0x7f2f979dc900 (LWP 3203))]

Thread 3 (Thread 0x7f2f7ef5d700 (LWP 3208)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x000000374078ef2b in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x3740a8df00 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x000000374078ef69 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00000039cf807f33 in start_thread (arg=0x7f2f7ef5d700) at pthread_create.c:309
#4  0x00000039cf0f4ded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f2efceb6700 (LWP 3209)):
#0  0x00000039cf0ea9dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00000039d1c495b4 in g_main_context_poll (priority=2147483647, n_fds=1, fds=0x7f2ef8002bb0, timeout=-1, context=0x7f2ef80009a0) at gmain.c:4007
#2  g_main_context_iterate (context=context@entry=0x7f2ef80009a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3708
#3  0x00000039d1c496dc in g_main_context_iteration (context=0x7f2ef80009a0, may_block=1) at gmain.c:3774
#4  0x00000037383b5af6 in QEventDispatcherGlib::processEvents (this=0x7f2ef80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:427
#5  0x000000373838595f in QEventLoop::processEvents (this=this@entry=0x7f2efceb5c80, flags=...) at kernel/qeventloop.cpp:149
#6  0x0000003738385cad in QEventLoop::exec (this=this@entry=0x7f2efceb5c80, flags=...) at kernel/qeventloop.cpp:204
#7  0x0000003738279e8f in QThread::exec (this=this@entry=0x2286130) at thread/qthread.cpp:538
#8  0x00000037383662e3 in QInotifyFileSystemWatcherEngine::run (this=0x2286130) at io/qfilesystemwatcher_inotify.cpp:265
#9  0x000000373827c6bf in QThreadPrivate::start (arg=0x2286130) at thread/qthread_unix.cpp:349
#10 0x00000039cf807f33 in start_thread (arg=0x7f2efceb6700) at pthread_create.c:309
#11 0x00000039cf0f4ded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f2f979dc900 (LWP 3203)):
[KCrash Handler]
#6  0x00000039cf811298 in _xend () at ../nptl/sysdeps/unix/sysv/linux/x86/elision-unlock.c:33
#7  __lll_unlock_elision (lock=0x7f2f884b1008, private=128) at ../nptl/sysdeps/unix/sysv/linux/x86/elision-unlock.c:29
#8  0x0000003828a37d66 in unlock (this=0x3b47170) at /usr/src/debug/kdelibs-4.12.5/kdecore/util/kshareddatacache.cpp:1245
#9  ~CacheLocker (this=<synthetic pointer>, __in_chrg=<optimized out>) at /usr/src/debug/kdelibs-4.12.5/kdecore/util/kshareddatacache.cpp:1317
#10 KSharedDataCache::insert (this=this@entry=0x32c3df0, key=..., data=...) at /usr/src/debug/kdelibs-4.12.5/kdecore/util/kshareddatacache.cpp:1595
#11 0x00000038290aece1 in KImageCache::insertImage (this=this@entry=0x32c3df0, key=..., image=...) at /usr/src/debug/kdelibs-4.12.5/kdeui/util/kimagecache.cpp:103
#12 0x00000038290aeea9 in KImageCache::insertPixmap (this=0x32c3df0, key=..., pixmap=...) at /usr/src/debug/kdelibs-4.12.5/kdeui/util/kimagecache.cpp:119
#13 0x000000382bdd4c7f in Plasma::ThemePrivate::scheduledCacheUpdate (this=0x1b76a30) at /usr/src/debug/kdelibs-4.12.5/plasma/theme.cpp:403
#14 0x000000382bddc709 in Plasma::Theme::qt_static_metacall (_o=<optimized out>, _id=<optimized out>, _a=0x7ffffa100c20, _c=<optimized out>) at /usr/src/debug/kdelibs-4.12.5/x86_64-redhat-linux-gnu/plasma/theme.moc:99
#15 0x000000373839b938 in QMetaObject::activate (sender=0x1a34440, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3567
#16 0x000000373839fce1 in QObject::event (this=0x1a34440, e=<optimized out>) at kernel/qobject.cpp:1184
#17 0x00000037389caebc in QApplicationPrivate::notify_helper (this=0x1a1e3a0, receiver=0x1a34440, e=0x7ffffa101090) at kernel/qapplication.cpp:4565
#18 0x00000037389d1825 in QApplication::notify (this=this@entry=0x19d7590, receiver=receiver@entry=0x1a34440, e=e@entry=0x7ffffa101090) at kernel/qapplication.cpp:4351
#19 0x000000382904ab0a in KApplication::notify (this=0x19d7590, receiver=0x1a34440, event=0x7ffffa101090) at /usr/src/debug/kdelibs-4.12.5/kdeui/kernel/kapplication.cpp:311
#20 0x0000003738386ebd in QCoreApplication::notifyInternal (this=0x19d7590, receiver=0x1a34440, event=event@entry=0x7ffffa101090) at kernel/qcoreapplication.cpp:953
#21 0x00000037383b8713 in sendEvent (event=0x7ffffa101090, receiver=<optimized out>) at kernel/qcoreapplication.h:231
#22 QTimerInfoList::activateTimers (this=this@entry=0x1a1e890) at kernel/qeventdispatcher_unix.cpp:621
#23 0x00000037383b5861 in timerSourceDispatch (source=source@entry=0x1a1e830) at kernel/qeventdispatcher_glib.cpp:186
#24 0x00000039d1c492a6 in g_main_dispatch (context=0x1a1e740) at gmain.c:3066
#25 g_main_context_dispatch (context=context@entry=0x1a1e740) at gmain.c:3642
#26 0x00000039d1c49628 in g_main_context_iterate (context=context@entry=0x1a1e740, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3713
#27 0x00000039d1c496dc in g_main_context_iteration (context=0x1a1e740, may_block=1) at gmain.c:3774
#28 0x00000037383b5ad5 in QEventDispatcherGlib::processEvents (this=0x1999650, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#29 0x0000003738a6cda6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:207
#30 0x000000373838595f in QEventLoop::processEvents (this=this@entry=0x7ffffa101320, flags=...) at kernel/qeventloop.cpp:149
#31 0x0000003738385cad in QEventLoop::exec (this=this@entry=0x7ffffa101320, flags=...) at kernel/qeventloop.cpp:204
#32 0x000000373838b399 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#33 0x00000037389c952c in QApplication::exec () at kernel/qapplication.cpp:3823
#34 0x000000382ac3d9cc in kdemain (argc=1, argv=0x7ffffa101598) at /usr/src/debug/kde-workspace-4.11.9/plasma/desktop/shell/main.cpp:126
#35 0x00000039cf021d65 in __libc_start_main (main=0x400940 <main(int, char**)>, argc=1, argv=0x7ffffa101598, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffffa101588) at libc-start.c:285
#36 0x0000000000400971 in _start ()

Reported using DrKonqi