Application: kontact (4.8.4)
KDE Platform Version: 4.8.4 (4.8.4)
Qt Version: 4.8.1
Operating System: Linux 3.2.0-29-generic x86_64
Distribution: Ubuntu 12.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:
 have several thousand emails in trash. trying to train spam filtering so less false positives as much mail is still being falsly categorised.

-- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:39
[Current thread is 1 (Thread 0x7f4d63d647c0 (LWP 15023))]

Thread 6 (Thread 0x7f4d472fb700 (LWP 15024)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f4d60563dec in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f4d60563f19 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f4d5ba27e9a in start_thread (arg=0x7f4d472fb700) at pthread_create.c:308
#4  0x00007f4d612954bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7f4d469fa700 (LWP 15025)):
#0  0x00007f4d61289b03 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f4d5b55b036 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4d5b55b164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4d61a0a426 in QEventDispatcherGlib::processEvents (this=0x7f4d400008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f4d619d9c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f4d619d9ed7 in QEventLoop::exec (this=0x7f4d469f9dc0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f4d618d8fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007f4d618dbfcb in QThreadPrivate::start (arg=0x1446990) at thread/qthread_unix.cpp:298
#8  0x00007f4d5ba27e9a in start_thread (arg=0x7f4d469fa700) at pthread_create.c:308
#9  0x00007f4d612954bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f4cf3b7c700 (LWP 15039)):
#0  0x00007f4d5ba2b05d in __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x7f4cec000a60) at pthread_mutex_unlock.c:290
#2  0x00007f4d5b5965d1 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4d5b55b16e in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4d61a0a426 in QEventDispatcherGlib::processEvents (this=0x7f4cec0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x00007f4d619d9c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f4d619d9ed7 in QEventLoop::exec (this=0x7f4cf3b7bd90, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f4d618d8fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#8  0x00007f4d619b99ff in QInotifyFileSystemWatcherEngine::run (this=0x1efd9d0) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f4d618dbfcb in QThreadPrivate::start (arg=0x1efd9d0) at thread/qthread_unix.cpp:298
#10 0x00007f4d5ba27e9a in start_thread (arg=0x7f4cf3b7c700) at pthread_create.c:308
#11 0x00007f4d612954bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f4cc7fff700 (LWP 27418)):
#0  0x00007f4d5b596336 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4d5b5965c9 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4d5b55ac49 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4d5b55b0a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4d5b55b164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4d61a0a426 in QEventDispatcherGlib::processEvents (this=0x7f4cc000a5d0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f4d619d9c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f4d619d9ed7 in QEventLoop::exec (this=0x7f4cc7ffed90, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f4d618d8fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x00007f4d619b99ff in QInotifyFileSystemWatcherEngine::run (this=0x1094aad0) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007f4d618dbfcb in QThreadPrivate::start (arg=0x1094aad0) at thread/qthread_unix.cpp:298
#11 0x00007f4d5ba27e9a in start_thread (arg=0x7f4cc7fff700) at pthread_create.c:308
#12 0x00007f4d612954bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f4cf924a700 (LWP 27793)):
[KCrash Handler]
#6  ref (this=0x7f4cc802ae70) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86_64.h:121
#7  QUrl::QUrl (this=0x7f4cf9249420, other=...) at io/qurl.cpp:4242
#8  0x00007f4d61e57619 in KUrl::KUrl (this=0x7f4cf9249420, u=...) at ../../kdecore/io/kurl.cpp:498
#9  0x00007f4d59b10aba in Nepomuk::ResourceWatcher::resources (this=<optimized out>) at ../../nepomuk/core/resourcewatcher.cpp:203
#10 0x00007f4d59af2e6d in Nepomuk::ResourceData::resetAll (this=0x7f4cc802c140, isDelete=true) at ../../nepomuk/core/resourcedata.cpp:183
#11 0x00007f4d59af38be in Nepomuk::ResourceData::~ResourceData (this=0x7f4cc802c140, __in_chrg=<optimized out>) at ../../nepomuk/core/resourcedata.cpp:106
#12 0x00007f4d59b08642 in Nepomuk::Resource::~Resource (this=0x7f4cc802c7b0, __in_chrg=<optimized out>) at ../../nepomuk/core/resource.cpp:143
#13 0x00007f4d59b08859 in Nepomuk::Resource::~Resource (this=0x7f4cc802c7b0, __in_chrg=<optimized out>) at ../../nepomuk/core/resource.cpp:145
#14 0x00007f4d59ae11ba in node_destruct (to=0x7f4cc802b110, from=0x7f4cc802b0b8, this=<optimized out>) at /usr/include/qt4/QtCore/qlist.h:431
#15 QList<Nepomuk::Resource>::free (data=0x7f4cc802b0a0, this=<optimized out>) at /usr/include/qt4/QtCore/qlist.h:757
#16 0x00007f4d59af1a9f in Nepomuk::ResourceData::load (this=0x7f4cc802b2d0) at ../../nepomuk/core/resourcedata.cpp:424
#17 0x00007f4d59af26dc in Nepomuk::ResourceData::property (this=0x7f4cc802b2d0, uri=...) at ../../nepomuk/core/resourcedata.cpp:275
#18 0x00007f4d59b090c3 in Nepomuk::Resource::property (this=0x7f4cf9249cc0, uri=...) at ../../nepomuk/core/resource.cpp:301
#19 0x00007f4cfd9d8c5a in ?? () from /usr/lib/libmessagecore.so.4
#20 0x00007f4d618cf4f2 in QThreadPoolThread::run (this=0x27ccdc0) at concurrent/qthreadpool.cpp:107
#21 0x00007f4d618dbfcb in QThreadPrivate::start (arg=0x27ccdc0) at thread/qthread_unix.cpp:298
#22 0x00007f4d5ba27e9a in start_thread (arg=0x7f4cf924a700) at pthread_create.c:308
#23 0x00007f4d612954bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#24 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f4d63d647c0 (LWP 15023)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:39
#1  0x00007f4d618daa9b in _q_futex (val2=0, addr2=0x0, timeout=0x0, val=2, op=0, addr=0x195d8b0) at thread/qmutex_unix.cpp:99
#2  QMutexPrivate::wait (this=0x195d8b0, timeout=<optimized out>) at thread/qmutex_unix.cpp:113
#3  0x00007f4d618d69cd in QMutex::lock (this=<optimized out>) at thread/qmutex.cpp:164
#4  0x00007f4d59b08a60 in lockInline (this=0x1547448) at /usr/include/qt4/QtCore/qmutex.h:188
#5  QMutexLocker (m=0x1547448, this=<synthetic pointer>) at /usr/include/qt4/QtCore/qmutex.h:109
#6  Nepomuk::Resource::determineFinalResourceData (this=0x7f4cc8042fc0) at ../../nepomuk/core/resource.cpp:970
#7  0x00007f4d59b0a4e3 in Nepomuk::Resource::resourceUri (this=0x7f4cc8042fc0) at ../../nepomuk/core/resource.cpp:187
#8  0x00007f4d59b1077d in Nepomuk::ResourceWatcher::addResource (this=0x17a5eb0, res=...) at ../../nepomuk/core/resourcewatcher.cpp:155
#9  0x00007f4d59b10de9 in qt_static_metacall (_a=<optimized out>, _id=<optimized out>, _o=<optimized out>, _c=<optimized out>) at ./resourcewatcher.moc:118
#10 Nepomuk::ResourceWatcher::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./resourcewatcher.moc:104
#11 0x00007f4d619f4446 in QObject::event (this=0x17a5eb0, e=<optimized out>) at kernel/qobject.cpp:1195
#12 0x00007f4d623d5894 in notify_helper (e=0x7f4cc802b270, receiver=0x17a5eb0, this=0x128d0a0) at kernel/qapplication.cpp:4559
#13 QApplicationPrivate::notify_helper (this=0x128d0a0, receiver=0x17a5eb0, e=0x7f4cc802b270) at kernel/qapplication.cpp:4531
#14 0x00007f4d623da713 in QApplication::notify (this=0x7ffffd7bb2d0, receiver=0x17a5eb0, e=0x7f4cc802b270) at kernel/qapplication.cpp:4420
#15 0x00007f4d6310f9e6 in KApplication::notify (this=0x7ffffd7bb2d0, receiver=0x17a5eb0, event=0x7f4cc802b270) at ../../kdeui/kernel/kapplication.cpp:311
#16 0x00007f4d619dae9c in QCoreApplication::notifyInternal (this=0x7ffffd7bb2d0, receiver=0x17a5eb0, event=0x7f4cc802b270) at kernel/qcoreapplication.cpp:876
#17 0x00007f4d619dec6a in sendEvent (event=0x7f4cc802b270, receiver=0x17a5eb0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#18 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x124d380) at kernel/qcoreapplication.cpp:1500
#19 0x00007f4d61a09f93 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#20 postEventSourceDispatch (s=<optimized out>) at kernel/qeventdispatcher_glib.cpp:279
#21 0x00007f4d5b55ad53 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f4d5b55b0a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f4d5b55b164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f4d61a0a3bf in QEventDispatcherGlib::processEvents (this=0x124ec10, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#25 0x00007f4d6247dd5e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#26 0x00007f4d619d9c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#27 0x00007f4d619d9ed7 in QEventLoop::exec (this=0x7ffffd7bb260, flags=...) at kernel/qeventloop.cpp:204
#28 0x00007f4d619def67 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#29 0x0000000000403629 in ?? ()
#30 0x00007f4d611c476d in __libc_start_main (main=0x402b40, argc=1, ubp_av=0x7ffffd7bb8f8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffffd7bb8e8) at libc-start.c:226
#31 0x0000000000403b61 in _start ()

Reported using DrKonqi