Application: plasma-desktop (0.4)
KDE Platform Version: 4.8.3 (4.8.3) "release 503"
Qt Version: 4.8.1
Operating System: Linux 3.1.10-1.9-desktop x86_64
Distribution: "openSUSE 12.1 (x86_64)"

-- Information about the crash:
I normally run two monitors.  When I login on my laptop docked I manually enable the second monitor using disper.  I use a panel on the second monitor with just a task manager.

When I logged in the second panel with the task manager from the second monitor had migrated to the first monitor, and was overlaying the panel from the primary monitor.  I removed the second monitor's panel and it crashed.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f96b170f760 (LWP 1887))]

Thread 3 (Thread 0x7f968a34d700 (LWP 1894)):
#0  0x00007f96aecfeff3 in poll () from /lib64/libc.so.6
#1  0x00007f96abad8a98 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f96abad8f59 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f96b036c2e6 in QEventDispatcherGlib::processEvents (this=0x7f967c0008e0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f96b033c012 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f96b033c267 in QEventLoop::exec (this=0x7f968a34cd30, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f96b023c547 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007f96b031bdff in QInotifyFileSystemWatcherEngine::run (this=0x1cfdb60) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f96b023f56b in QThreadPrivate::start (arg=0x1cfdb60) at thread/qthread_unix.cpp:298
#9  0x00007f96a110ab74 in ?? () from /usr/lib64/libGL.so.1
#10 0x00007f96affa7f05 in start_thread () from /lib64/libpthread.so.0
#11 0x00007f96aed0810d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f9689912700 (LWP 1895)):
#0  0x00007f96affabe6c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f96a4d9d952 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f96a5096e80) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f96a4d9d989 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f96a110ab74 in ?? () from /usr/lib64/libGL.so.1
#4  0x00007f96affa7f05 in start_thread () from /lib64/libpthread.so.0
#5  0x00007f96aed0810d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f96b170f760 (LWP 1887)):
[KCrash Handler]
#6  0x0000000002ef0920 in ?? ()
#7  0x00007f96b03528e8 in QObject::connect (sender=0x343bf20, signal=0x7f9695caf9b8 "2destroyed()", receiver=0x346a5c0, method=0x7f9695caf9a7 "1widgetDeleted()", type=Qt::AutoConnection) at kernel/qobject.cpp:2560
#8  0x00007f9695c91408 in SystemTray::Task::widget (this=0x346a5c0, host=0xd4ddb0, createIfNecessary=<optimized out>) at /usr/src/debug/kde-workspace-4.8.3/plasma/generic/applets/systemtray/core/task.cpp:83
#9  0x00007f9695cac186 in SystemTray::TaskArea::addWidgetForTask (this=0xdea860, task=0x346a5c0) at /usr/src/debug/kde-workspace-4.8.3/plasma/generic/applets/systemtray/ui/taskarea.cpp:265
#10 0x00007f9695cac846 in SystemTray::TaskArea::addTask (this=0xdea860, task=<optimized out>) at /usr/src/debug/kde-workspace-4.8.3/plasma/generic/applets/systemtray/ui/taskarea.cpp:196
#11 0x00007f96b03510f1 in QMetaObject::activate (sender=0xa99270, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff22549bf0) at kernel/qobject.cpp:3556
#12 0x00007f9695c8ff52 in SystemTray::Manager::taskChanged (this=<optimized out>, _t1=0x346a5c0) at /usr/src/debug/kde-workspace-4.8.3/build/plasma/generic/applets/systemtray/manager.moc:120
#13 0x00007f96b03510f1 in QMetaObject::activate (sender=0x346a5c0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff22549d40) at kernel/qobject.cpp:3556
#14 0x00007f9695c90e4f in SystemTray::Task::changed (this=<optimized out>, _t1=0x346a5c0) at /usr/src/debug/kde-workspace-4.8.3/build/plasma/generic/applets/systemtray/task.moc:128
#15 0x00007f96b03562b6 in QObject::event (this=0x346a5c0, e=<optimized out>) at kernel/qobject.cpp:1204
#16 0x00007f96af4a50d4 in notify_helper (e=0x111e0e0, receiver=0x346a5c0, this=0x7ef090) at kernel/qapplication.cpp:4554
#17 QApplicationPrivate::notify_helper (this=0x7ef090, receiver=0x346a5c0, e=0x111e0e0) at kernel/qapplication.cpp:4526
#18 0x00007f96af4a9f53 in QApplication::notify (this=0x739970, receiver=0x346a5c0, e=0x111e0e0) at kernel/qapplication.cpp:4415
#19 0x00007f96b10fd8f6 in KApplication::notify (this=0x739970, receiver=0x346a5c0, event=0x111e0e0) at /usr/src/debug/kdelibs-4.8.3/kdeui/kernel/kapplication.cpp:311
#20 0x00007f96b033d22c in QCoreApplication::notifyInternal (this=0x739970, receiver=0x346a5c0, event=0x111e0e0) at kernel/qcoreapplication.cpp:876
#21 0x00007f96b0340aca in sendEvent (event=0x111e0e0, receiver=0x346a5c0) at kernel/qcoreapplication.h:231
#22 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x6153d0) at kernel/qcoreapplication.cpp:1500
#23 0x00007f96b036be53 in sendPostedEvents () at kernel/qcoreapplication.h:236
#24 postEventSourceDispatch (s=0x7f1c70) at kernel/qeventdispatcher_glib.cpp:279
#25 0x00007f96abad858d in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#26 0x00007f96abad8d88 in ?? () from /usr/lib64/libglib-2.0.so.0
#27 0x00007f96abad8f59 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#28 0x00007f96b036c27f in QEventDispatcherGlib::processEvents (this=0x7e78b0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#29 0x00007f96af54876e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#30 0x00007f96b033c012 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#31 0x00007f96b033c267 in QEventLoop::exec (this=0x7fff2254a680, flags=...) at kernel/qeventloop.cpp:204
#32 0x00007f96b0340dc5 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#33 0x00007f969ce90023 in kdemain (argc=1, argv=0x749bf0) at /usr/src/debug/kde-workspace-4.8.3/plasma/desktop/shell/main.cpp:120
#34 0x00000000004088e4 in launch (argc=1, _name=0x7492f8 "/usr/bin/plasma-desktop", args=<optimized out>, cwd=0x0, envc=<optimized out>, envs=<optimized out>, reset_env=false, tty=0x0, avoid_loops=false, startup_id_str=0x40b28e "0") at /usr/src/debug/kdelibs-4.8.3/kinit/kinit.cpp:734
#35 0x00000000004099e6 in handle_launcher_request (sock=8, who=<optimized out>) at /usr/src/debug/kdelibs-4.8.3/kinit/kinit.cpp:1226
#36 0x0000000000409f27 in handle_requests (waitForPid=0) at /usr/src/debug/kdelibs-4.8.3/kinit/kinit.cpp:1419
#37 0x00000000004057a7 in main (argc=4, argv=0x7fff00000001, envp=0x7fff2254bbb0) at /usr/src/debug/kdelibs-4.8.3/kinit/kinit.cpp:1907

Possible duplicates by query: bug 299063, bug 290712.

Reported using DrKonqi