Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.4 (4.7.4)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-16-server x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
I removed the main panel from my desktop, in efforts to customize my Plasma.
- Unusual behavior I noticed:
Prior to the crash, I was unable to add the "Desktop Pager" or any other widget to the panel.

I read in the crash reports two relating to removing the main panel, each were marked as a duplicate of a report related to removing "desktop activity" causing a crash. This report was determined not to be caused by KDE or Plasma directly, implying that the duplicates also have this same determination, which is not the case in this case - This is a fresh install and a clean system.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f6c0fd3e7c0 (LWP 4815))]

Thread 4 (Thread 0x7f6bebd74700 (LWP 4816)):
#0  0x00007fff229ff805 in ?? ()
#1  0x00007f6c03c1507b in __GI_clock_gettime (clock_id=1, tp=0x7f6bebd73a40) at ../sysdeps/unix/clock_gettime.c:100
#2  0x00007f6c0c746074 in do_gettime (frac=0x7f6bebd73a58, sec=0x7f6bebd73a50) at tools/qelapsedtimer_unix.cpp:123
#3  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#4  0x00007f6c0c8086ed in QTimerInfoList::updateCurrentTime (this=0x7f6be40020d0) at kernel/qeventdispatcher_unix.cpp:339
#5  0x00007f6c0c808a33 in QTimerInfoList::timerWait (this=0x7f6be40020d0, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#6  0x00007f6c0c80744c in timerSourcePrepareHelper (src=<optimized out>, timeout=0x7f6bebd73b3c) at kernel/qeventdispatcher_glib.cpp:136
#7  0x00007f6c0c8074f5 in timerSourcePrepare (source=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#8  0x00007f6c0395eff2 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007f6c0395fdfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f6c03960429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f6c0c807f3e in QEventDispatcherGlib::processEvents (this=0x7f6be40008b0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#12 0x00007f6c0c7dbcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#13 0x00007f6c0c7dbef7 in QEventLoop::exec (this=0x7f6bebd73cd0, flags=...) at kernel/qeventloop.cpp:201
#14 0x00007f6c0c6f327f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#15 0x00007f6c0c7becbf in QInotifyFileSystemWatcherEngine::run (this=0x1398370) at io/qfilesystemwatcher_inotify.cpp:248
#16 0x00007f6c0c6f5d05 in QThreadPrivate::start (arg=0x1398370) at thread/qthread_unix.cpp:331
#17 0x00007f6c00c7856c in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#18 0x00007f6c0446cefc in start_thread (arg=0x7f6bebd74700) at pthread_create.c:304
#19 0x00007f6c0f62959d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#20 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f6be951f700 (LWP 4817)):
#0  0x00007f6c0f61d473 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f6c0395ff68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6c03960429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6c0c807f3e in QEventDispatcherGlib::processEvents (this=0x1537d90, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f6c0c7dbcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f6c0c7dbef7 in QEventLoop::exec (this=0x7f6be951ecd0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f6c0c6f327f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f6c0c7becbf in QInotifyFileSystemWatcherEngine::run (this=0x1537030) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f6c0c6f5d05 in QThreadPrivate::start (arg=0x1537030) at thread/qthread_unix.cpp:331
#9  0x00007f6c00c7856c in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#10 0x00007f6c0446cefc in start_thread (arg=0x7f6be951f700) at pthread_create.c:304
#11 0x00007f6c0f62959d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f6be2248700 (LWP 4823)):
#0  0x00007f6c0f61d473 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f6c0395ff68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6c03960792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6be2d26516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f6c039852b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f6c00c7856c in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#6  0x00007f6c0446cefc in start_thread (arg=0x7f6be2248700) at pthread_create.c:304
#7  0x00007f6c0f62959d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f6c0fd3e7c0 (LWP 4815)):
[KCrash Handler]
#6  0x00007f6c0c1470b4 in QGraphicsItem::isPanel (this=0x1703650) at graphicsview/qgraphicsitem.cpp:1780
#7  0x00007f6c0c18acbb in QGraphicsScene::event (this=0xb70590, event=<optimized out>) at graphicsview/qgraphicsscene.cpp:3490
#8  0x00007f6c0bb8c474 in notify_helper (e=0x7fff228c3070, receiver=0xb70590, this=0x9ac040) at kernel/qapplication.cpp:4486
#9  QApplicationPrivate::notify_helper (this=0x9ac040, receiver=0xb70590, e=0x7fff228c3070) at kernel/qapplication.cpp:4458
#10 0x00007f6c0bb912e1 in QApplication::notify (this=0x99d850, receiver=0xb70590, e=0x7fff228c3070) at kernel/qapplication.cpp:4365
#11 0x00007f6c0d48b466 in KApplication::notify (this=0x99d850, receiver=0xb70590, event=0x7fff228c3070) at ../../kdeui/kernel/kapplication.cpp:311
#12 0x00007f6c0c7dcafc in QCoreApplication::notifyInternal (this=0x99d850, receiver=0xb70590, event=0x7fff228c3070) at kernel/qcoreapplication.cpp:787
#13 0x00007f6c0c1a8f87 in sendEvent (event=0x7fff228c3070, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#14 QGraphicsView::viewportEvent (this=0x1776950, event=0x7fff228c3070) at graphicsview/qgraphicsview.cpp:2793
#15 0x00007f6c0c7dcc88 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<optimized out>, receiver=0x17889a0, event=0x7fff228c3070) at kernel/qcoreapplication.cpp:902
#16 0x00007f6c0bb8c43f in notify_helper (e=0x7fff228c3070, receiver=0x17889a0, this=0x9ac040) at kernel/qapplication.cpp:4482
#17 QApplicationPrivate::notify_helper (this=0x9ac040, receiver=0x17889a0, e=0x7fff228c3070) at kernel/qapplication.cpp:4458
#18 0x00007f6c0bb912e1 in QApplication::notify (this=0x99d850, receiver=0x17889a0, e=0x7fff228c3070) at kernel/qapplication.cpp:4365
#19 0x00007f6c0d48b466 in KApplication::notify (this=0x99d850, receiver=0x17889a0, event=0x7fff228c3070) at ../../kdeui/kernel/kapplication.cpp:311
#20 0x00007f6c0c7dcafc in QCoreApplication::notifyInternal (this=0x99d850, receiver=0x17889a0, event=0x7fff228c3070) at kernel/qcoreapplication.cpp:787
#21 0x00007f6c0bbdd4bf in sendEvent (event=0x7fff228c3070, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#22 QWidget::event (this=<optimized out>, event=0x7fff228c3070) at kernel/qwidget.cpp:8551
#23 0x00007f6c0bf855b6 in QFrame::event (this=0x1776950, e=0x7fff228c3070) at widgets/qframe.cpp:557
#24 0x00007f6c0c0072fb in QAbstractScrollArea::event (this=0x1776950, e=0x7fff228c3070) at widgets/qabstractscrollarea.cpp:996
#25 0x00007f6c0bb8c474 in notify_helper (e=0x7fff228c3070, receiver=0x1776950, this=0x9ac040) at kernel/qapplication.cpp:4486
#26 QApplicationPrivate::notify_helper (this=0x9ac040, receiver=0x1776950, e=0x7fff228c3070) at kernel/qapplication.cpp:4458
#27 0x00007f6c0bb912e1 in QApplication::notify (this=0x99d850, receiver=0x1776950, e=0x7fff228c3070) at kernel/qapplication.cpp:4365
#28 0x00007f6c0d48b466 in KApplication::notify (this=0x99d850, receiver=0x1776950, event=0x7fff228c3070) at ../../kdeui/kernel/kapplication.cpp:311
#29 0x00007f6c0c7dcafc in QCoreApplication::notifyInternal (this=0x99d850, receiver=0x1776950, event=0x7fff228c3070) at kernel/qcoreapplication.cpp:787
#30 0x00007f6c0bb8fc6d in sendSpontaneousEvent (event=0x7fff228c3070, receiver=0x1776950) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#31 QApplication::setActiveWindow (act=<optimized out>) at kernel/qapplication.cpp:2624
#32 0x00007f6c0bc0bc4d in QApplication::x11ProcessEvent (this=0x99d850, event=0x7fff228c3600) at kernel/qapplication_x11.cpp:3612
#33 0x00007f6c0bc344a2 in x11EventSourceDispatch (s=0x9b2810, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#34 0x00007f6c0395fa5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007f6c03960258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007f6c03960429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007f6c0c807ed6 in QEventDispatcherGlib::processEvents (this=0x8fbf40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#38 0x00007f6c0bc3410e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#39 0x00007f6c0c7dbcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#40 0x00007f6c0c7dbef7 in QEventLoop::exec (this=0x7fff228c39d0, flags=...) at kernel/qeventloop.cpp:201
#41 0x00007f6c0c7e0789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#42 0x00007f6c0f9281a3 in kdemain (argc=1, argv=0x7fff228c3db8) at ../../../../plasma/desktop/shell/main.cpp:120
#43 0x00007f6c0f56730d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff228c3db8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff228c3da8) at libc-start.c:226
#44 0x0000000000400671 in _start ()

Possible duplicates by query: bug 295149, bug 295022, bug 293050, bug 289925, bug 289906.

Reported using DrKonqi