Application: plasma-desktop (4.11.1)
KDE Platform Version: 4.11.1
Qt Version: 4.8.5
Operating System: Linux 3.11.0-1-ARCH x86_64
Distribution: "Arch Linux"

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

Plasma-desktop crashes when switching activity. It is reproducible with clean user

The crash can be reproduced every time.

-- Backtrace:
Application: Оболочка Plasma (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f8addd50780 (LWP 2026))]

Thread 2 (Thread 0x7f8a345d7700 (LWP 2027)):
#0  0x00007f8adb23cf5d in poll () from /usr/lib/libc.so.6
#1  0x00007f8ad832b084 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f8ad832b18c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f8adc9a850e in QEventDispatcherGlib::processEvents (this=0x7f8a2c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:427
#4  0x00007f8adc975c8f in QEventLoop::processEvents (this=this@entry=0x7f8a345d6e20, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f8adc975f6d in QEventLoop::exec (this=this@entry=0x7f8a345d6e20, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f8adc863916 in QThread::exec (this=this@entry=0x2543c80) at thread/qthread.cpp:536
#7  0x00007f8adc955418 in QInotifyFileSystemWatcherEngine::run (this=0x2543c80) at io/qfilesystemwatcher_inotify.cpp:256
#8  0x00007f8adc865e9c in QThreadPrivate::start (arg=0x2543c80) at thread/qthread_unix.cpp:338
#9  0x00007f8adc5d10a2 in start_thread () from /usr/lib/libpthread.so.0
#10 0x00007f8adb245a2d in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7f8addd50780 (LWP 2026)):
[KCrash Handler]
#6  0x00007f8abfcdc41c in TaskManager::TaskGroup::add (this=0x51d4530, item=item@entry=0x20d7680, insertIndex=insertIndex@entry=-1) at /tmp/yaourt-tmp-vlad/abs-kdebase-workspace/src/kde-workspace-4.11.1/libs/taskmanager/taskgroup.cpp:221
#7  0x00007f8abfcbf9c2 in TaskManager::GroupManagerPrivate::currentActivityChanged (this=0x1ea1a50, newActivity=...) at /tmp/yaourt-tmp-vlad/abs-kdebase-workspace/src/kde-workspace-4.11.1/libs/taskmanager/groupmanager.cpp:469
#8  0x00007f8abfcc2800 in TaskManager::GroupManager::qt_static_metacall (_o=<optimized out>, _id=<optimized out>, _a=<optimized out>, _c=<optimized out>) at /tmp/yaourt-tmp-vlad/abs-kdebase-workspace/src/build/libs/taskmanager/groupmanager.moc:85
#9  0x00007f8adc98d8d8 in QMetaObject::activate (sender=0x1ea06e0, m=m@entry=0x7f8abff034e0 <TaskManager::TaskManager::staticMetaObject>, local_signal_index=local_signal_index@entry=5, argv=argv@entry=0x7fffb1bef760) at kernel/qobject.cpp:3547
#10 0x00007f8abfce2365 in TaskManager::TaskManager::activityChanged (this=<optimized out>, _t1=...) at /tmp/yaourt-tmp-vlad/abs-kdebase-workspace/src/build/libs/taskmanager/taskmanager.moc:221
#11 0x00007f8abfce4751 in TaskManager::TaskManager::qt_static_metacall (_o=0x0, _id=0, _a=0x2, _c=<optimized out>) at /tmp/yaourt-tmp-vlad/abs-kdebase-workspace/src/build/libs/taskmanager/taskmanager.moc:100
#12 0x00007f8adc98d8d8 in QMetaObject::activate (sender=0x1e9f460, m=m@entry=0x7f8ac78c5640 <KActivities::Consumer::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffb1bef8c0) at kernel/qobject.cpp:3547
#13 0x00007f8ac76b2d02 in KActivities::Consumer::currentActivityChanged (this=<optimized out>, _t1=...) at /tmp/yaourt-tmp-vlad/abs-kactivities/src/build/src/lib/core/moc_consumer.cpp:140
#14 0x00007f8adc98d8d8 in QMetaObject::activate (sender=0x1bc1240, m=m@entry=0x7f8ac78c5600 <KActivities::ConsumerPrivate::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7fffb1bef9e0) at kernel/qobject.cpp:3547
#15 0x00007f8ac76b2ec5 in KActivities::ConsumerPrivate::currentActivityChanged (this=<optimized out>, _t1=...) at /tmp/yaourt-tmp-vlad/abs-kactivities/src/build/src/lib/core/moc_consumer_p.cpp:141
#16 0x00007f8ac76b4886 in KActivities::ConsumerPrivate::setCurrentActivity (this=<optimized out>, activity=...) at /tmp/yaourt-tmp-vlad/abs-kactivities/src/kactivities-4.11.1/src/lib/core/consumer.cpp:103
#17 0x00007f8ac76b2ba1 in KActivities::ConsumerPrivate::qt_static_metacall (_o=<optimized out>, _id=<optimized out>, _a=<optimized out>, _c=<optimized out>) at /tmp/yaourt-tmp-vlad/abs-kactivities/src/build/src/lib/core/moc_consumer_p.cpp:82
#18 0x00007f8adc98d8d8 in QMetaObject::activate (sender=0x1bc0da0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fffb1befb80) at kernel/qobject.cpp:3547
#19 0x00007f8ac76bde29 in CurrentActivityChanged (_t1=..., this=<optimized out>) at /tmp/yaourt-tmp-vlad/abs-kactivities/src/build/src/lib/core/activities_interface.moc:242
#20 OrgKdeActivityManagerActivitiesInterface::qt_static_metacall (_o=0x1bc0da0, _id=0, _id@entry=8, _a=0x7fffb1befd40, _c=<optimized out>) at /tmp/yaourt-tmp-vlad/abs-kactivities/src/build/src/lib/core/activities_interface.moc:107
#21 0x00007f8ac76be073 in qt_static_metacall (_a=0x7fffb1befd40, _id=8, _c=QMetaObject::InvokeMetaMethod, _o=0x1bc0da0) at /tmp/yaourt-tmp-vlad/abs-kactivities/src/build/src/lib/core/activities_interface.moc:175
#22 OrgKdeActivityManagerActivitiesInterface::qt_metacall (this=0x1bc0da0, _c=QMetaObject::InvokeMetaMethod, _id=8, _a=0x7fffb1befd40) at /tmp/yaourt-tmp-vlad/abs-kactivities/src/build/src/lib/core/activities_interface.moc:176
#23 0x00007f8ad958c24e in QDBusConnectionPrivate::deliverCall (this=0x1a044b0, object=0x1bc0da0, msg=..., metaTypes=..., slotIdx=13) at qdbusintegrator.cpp:951
#24 0x00007f8adc992446 in QObject::event (this=0x1bc0da0, e=<optimized out>) at kernel/qobject.cpp:1194
#25 0x00007f8adb9f1411 in QApplicationPrivate::notify_helper (this=this@entry=0x1a1a650, receiver=receiver@entry=0x1bc0da0, e=e@entry=0x4c4cc30) at kernel/qapplication.cpp:4562
#26 0x00007f8adb9f83fd in QApplication::notify (this=this@entry=0x19ffea0, receiver=receiver@entry=0x1bc0da0, e=e@entry=0x4c4cc30) at kernel/qapplication.cpp:4348
#27 0x00007f8add74b02a in KApplication::notify (this=0x19ffea0, receiver=0x1bc0da0, event=0x4c4cc30) at /tmp/yaourt-tmp-vlad/abs-kdelibs/src/kdelibs-4.11.1/kdeui/kernel/kapplication.cpp:311
#28 0x00007f8adc97790c in QCoreApplication::notifyInternal (this=0x19ffea0, receiver=receiver@entry=0x1bc0da0, event=event@entry=0x4c4cc30) at kernel/qcoreapplication.cpp:949
#29 0x00007f8adc97aed2 in sendEvent (event=0x4c4cc30, receiver=0x1bc0da0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#30 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x190c150) at kernel/qcoreapplication.cpp:1573
#31 0x00007f8adc97b307 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1466
#32 0x00007f8adc9a8db3 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#33 postEventSourceDispatch (s=0x1a1a4b0) at kernel/qeventdispatcher_glib.cpp:280
#34 0x00007f8ad832ad96 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#35 0x00007f8ad832b0e8 in ?? () from /usr/lib/libglib-2.0.so.0
#36 0x00007f8ad832b18c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#37 0x00007f8adc9a84e3 in QEventDispatcherGlib::processEvents (this=0x1a04df0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#38 0x00007f8adba9fec6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#39 0x00007f8adc975c8f in QEventLoop::processEvents (this=this@entry=0x7fffb1bf03f0, flags=...) at kernel/qeventloop.cpp:149
#40 0x00007f8adc975f6d in QEventLoop::exec (this=this@entry=0x7fffb1bf03f0, flags=...) at kernel/qeventloop.cpp:204
#41 0x00007f8adc97bfeb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1221
#42 0x00007f8adb9ef7fc in QApplication::exec () at kernel/qapplication.cpp:3823
#43 0x00007f8ac7d58fda in kdemain (argc=1, argv=0x190d610) at /tmp/yaourt-tmp-vlad/abs-kdebase-workspace/src/kde-workspace-4.11.1/plasma/desktop/shell/main.cpp:126
#44 0x0000000000408157 in launch (argc=argc@entry=1, _name=_name@entry=0x199e208 "/usr/bin/plasma-desktop", args=args@entry=0x199e220 "", cwd=cwd@entry=0x0, envc=envc@entry=0, envs=<optimized out>, envs@entry=0x199e228 "", reset_env=false, tty=tty@entry=0x0, avoid_loops=false, startup_id_str=startup_id_str@entry=0x40a982 "0") at /tmp/yaourt-tmp-vlad/abs-kdelibs/src/kdelibs-4.11.1/kinit/kinit.cpp:726
#45 0x0000000000408fe3 in handle_launcher_request (sock=8, who=<optimized out>) at /tmp/yaourt-tmp-vlad/abs-kdelibs/src/kdelibs-4.11.1/kinit/kinit.cpp:1218
#46 0x00000000004096fa in handle_requests (waitForPid=waitForPid@entry=0) at /tmp/yaourt-tmp-vlad/abs-kdelibs/src/kdelibs-4.11.1/kinit/kinit.cpp:1411
#47 0x00000000004051c9 in main (argc=4, argv=<optimized out>, envp=0x7fffb1bf0ff0) at /tmp/yaourt-tmp-vlad/abs-kdelibs/src/kdelibs-4.11.1/kinit/kinit.cpp:1899

Reported using DrKonqi