Application: plasma-desktop (4.11.1)
KDE Platform Version: 4.11.1
Qt Version: 4.8.4
Operating System: Linux 3.8.0-30-generic x86_64
Distribution: Ubuntu 13.04

-- Information about the crash:
- What I was doing when the application crashed:
Plasma keeps on crashing randomly since upgrade to 4.11. It does not depend on any specific user triggered action, it even occurs when using non-KDE related programs.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma-Desktop-Umgebung (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f0bf7fee7c0 (LWP 2189))]

Thread 4 (Thread 0x7f0bd7d99700 (LWP 2191)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f0bf0d18b27 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f0bf0d18b59 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f0beb3fff8e in start_thread (arg=0x7f0bd7d99700) at pthread_create.c:311
#4  0x00007f0bf78d7e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7f0b4687f700 (LWP 2194)):
#0  0x00007fffa0d86af7 in ?? ()
#1  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f0b453c7700 (LWP 2195)):
#0  0x00007fffa0d86af7 in ?? ()
#1  0x00007f0beafae078 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x0000000200000000 in ?? ()
#3  0x00007f0b38002860 in ?? ()
#4  0x00007f0b453c6b80 in ?? ()
#5  0x00007f0b453c6c38 in ?? ()
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f0bf7fee7c0 (LWP 2189)):
[KCrash Handler]
#6  0x00007f0b4a0db00b in KCalCore::IncidenceBase::update() () from /usr/lib/libkcalcore.so.4
#7  0x00007f0b4a0db129 in KCalCore::IncidenceBase::startUpdates() () from /usr/lib/libkcalcore.so.4
#8  0x00007f0b4a0db159 in KCalCore::IncidenceBase::operator=(KCalCore::IncidenceBase const&) () from /usr/lib/libkcalcore.so.4
#9  0x00007f0b49ba0975 in ?? () from /usr/lib/libakonadi-calendar.so.4
#10 0x00007f0b49ba2afd in ?? () from /usr/lib/libakonadi-calendar.so.4
#11 0x00007f0bf449b0ef in QMetaObject::activate (sender=sender@entry=0x4055200, m=m@entry=0x7f0bf47e15e0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffa0d141f0) at kernel/qobject.cpp:3539
#12 0x00007f0bf44e5f97 in QAbstractItemModel::dataChanged (this=this@entry=0x4055200, _t1=..., _t2=...) at .moc/release-shared/moc_qabstractitemmodel.cpp:164
#13 0x00007f0bf3dbdaac in QSortFilterProxyModelPrivate::_q_sourceDataChanged (this=0x3723270, source_top_left=..., source_bottom_right=...) at itemviews/qsortfilterproxymodel.cpp:1210
#14 0x00007f0bf449b0ef in QMetaObject::activate (sender=sender@entry=0x21826f0, m=m@entry=0x7f0bf47e15e0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffa0d14490) at kernel/qobject.cpp:3539
#15 0x00007f0bf44e5f97 in QAbstractItemModel::dataChanged (this=this@entry=0x21826f0, _t1=..., _t2=...) at .moc/release-shared/moc_qabstractitemmodel.cpp:164
#16 0x00007f0bf3dbdaac in QSortFilterProxyModelPrivate::_q_sourceDataChanged (this=0x222e0f0, source_top_left=..., source_bottom_right=...) at itemviews/qsortfilterproxymodel.cpp:1210
#17 0x00007f0bf449b0ef in QMetaObject::activate (sender=sender@entry=0x289acc0, m=m@entry=0x7f0bf47e15e0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffa0d14730) at kernel/qobject.cpp:3539
#18 0x00007f0bf44e5f97 in QAbstractItemModel::dataChanged (this=this@entry=0x289acc0, _t1=..., _t2=...) at .moc/release-shared/moc_qabstractitemmodel.cpp:164
#19 0x00007f0bf510bc9a in KDescendantsProxyModelPrivate::sourceDataChanged (this=<optimized out>, topLeft=..., bottomRight=...) at ../../kdeui/itemviews/kdescendantsproxymodel.cpp:970
#20 0x00007f0bf449b0ef in QMetaObject::activate (sender=0x370bb20, m=m@entry=0x7f0bf47e15e0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffa0d14950) at kernel/qobject.cpp:3539
#21 0x00007f0bf44e5f97 in QAbstractItemModel::dataChanged (this=<optimized out>, _t1=..., _t2=...) at .moc/release-shared/moc_qabstractitemmodel.cpp:164
#22 0x00007f0b48c3d1c5 in ?? () from /usr/lib/libakonadi-kde.so.4
#23 0x00007f0b48c432c7 in ?? () from /usr/lib/libakonadi-kde.so.4
#24 0x00007f0bf449b0ef in QMetaObject::activate (sender=0x371add0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fffa0d14bc0) at kernel/qobject.cpp:3539
#25 0x00007f0b48c7c907 in Akonadi::Monitor::itemChanged(Akonadi::Item const&, QSet<QByteArray> const&) () from /usr/lib/libakonadi-kde.so.4
#26 0x00007f0b48c82ac1 in ?? () from /usr/lib/libakonadi-kde.so.4
#27 0x00007f0b48c84070 in ?? () from /usr/lib/libakonadi-kde.so.4
#28 0x00007f0b48beca79 in ?? () from /usr/lib/libakonadi-kde.so.4
#29 0x00007f0b48c80b3f in ?? () from /usr/lib/libakonadi-kde.so.4
#30 0x00007f0b48c80bd9 in ?? () from /usr/lib/libakonadi-kde.so.4
#31 0x00007f0bf449b0ef in QMetaObject::activate (sender=0x371b330, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3539
#32 0x00007f0b48bef4a4 in ?? () from /usr/lib/libakonadi-kde.so.4
#33 0x00007f0bf449b0ef in QMetaObject::activate (sender=sender@entry=0x5b69ed0, m=m@entry=0x7f0bf4f114e0 <KJob::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7fffa0d153d0) at kernel/qobject.cpp:3539
#34 0x00007f0bf4b84b92 in KJob::result (this=this@entry=0x5b69ed0, _t1=_t1@entry=0x5b69ed0) at ./kjob.moc:208
#35 0x00007f0bf4b84bd0 in KJob::emitResult (this=0x5b69ed0) at ../../kdecore/jobs/kjob.cpp:318
#36 0x00007f0bf44a05be in QObject::event (this=0x5b69ed0, e=<optimized out>) at kernel/qobject.cpp:1194
#37 0x00007f0bf382c8ec in QApplicationPrivate::notify_helper (this=this@entry=0x10d9ac0, receiver=receiver@entry=0x5b69ed0, e=e@entry=0x5fc34a0) at kernel/qapplication.cpp:4567
#38 0x00007f0bf382f25b in QApplication::notify (this=this@entry=0x10ca400, receiver=receiver@entry=0x5b69ed0, e=e@entry=0x5fc34a0) at kernel/qapplication.cpp:4428
#39 0x00007f0bf5148916 in KApplication::notify (this=0x10ca400, receiver=0x5b69ed0, event=0x5fc34a0) at ../../kdeui/kernel/kapplication.cpp:311
#40 0x00007f0bf448663e in QCoreApplication::notifyInternal (this=0x10ca400, receiver=receiver@entry=0x5b69ed0, event=event@entry=0x5fc34a0) at kernel/qcoreapplication.cpp:946
#41 0x00007f0bf448a171 in sendEvent (event=0x5fc34a0, receiver=0x5b69ed0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#42 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x10441f0) at kernel/qcoreapplication.cpp:1570
#43 0x00007f0bf448a4a3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1463
#44 0x00007f0bf44b4e83 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#45 postEventSourceDispatch (s=0x10dc270) at kernel/qeventdispatcher_glib.cpp:279
#46 0x00007f0beacfcf05 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#47 0x00007f0beacfd248 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#48 0x00007f0beacfd304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#49 0x00007f0bf44b5016 in QEventDispatcherGlib::processEvents (this=0x1045ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#50 0x00007f0bf38d213e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#51 0x00007f0bf448538f in QEventLoop::processEvents (this=this@entry=0x7fffa0d15ce0, flags=...) at kernel/qeventloop.cpp:149
#52 0x00007f0bf4485618 in QEventLoop::exec (this=this@entry=0x7fffa0d15ce0, flags=...) at kernel/qeventloop.cpp:204
#53 0x00007f0bf448acf6 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#54 0x00007f0bf382affc in QApplication::exec () at kernel/qapplication.cpp:3828
#55 0x00007f0bf7be33eb in kdemain (argc=1, argv=0x7fffa0d15fd8) at ../../../../plasma/desktop/shell/main.cpp:126
#56 0x00007f0bf77ffea5 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=1, ubp_av=0x7fffa0d15fd8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffa0d15fc8) at libc-start.c:260
#57 0x0000000000400711 in _start ()

Possible duplicates by query: bug 325171.

Reported using DrKonqi