Bug 240160

Application: plasma-desktop (0.3)
KDE Platform Version: 4.4.81 (KDE 4.4.81 (KDE 4.5 >= 20100527)) (Compiled from sources)
Qt Version: 4.6.2
Operating System: Linux 2.6.34-gentoo x86_64
Distribution (Platform): Gentoo Packages

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

This crash happened after moving the bottom panel to the top via DnD

-- Backtrace:
Application: Plasma-Arbeitsfläche (plasma-desktop), signal: Segmentation fault
Traceback (most recent call last):
  File "/usr/share/gdb/auto-load/usr/lib64/libgobject-2.0.so.0.2200.5-gdb.py", line 9, in <module>
    from gobject import register
  File "/usr/share/glib-2.0/gdb/gobject.py", line 3, in <module>
    import gdb.backtrace
ImportError: No module named backtrace
[Current thread is 1 (Thread 0x7f550cbcd7a0 (LWP 16935))]

Thread 2 (Thread 0x7f54e93fb710 (LWP 32468)):
#0  0x00007f5509b8b76c in pthread_cond_wait () from /lib/libpthread.so.0
#1  0x00007f5507ac6036 in QTWTF::TCMalloc_PageHeap::scavengerThread() () from /usr/lib64/qt4/libQtScript.so.4
#2  0x00007f5507ac6079 in QTWTF::TCMalloc_PageHeap::runScavengerThread(void*) () from /usr/lib64/qt4/libQtScript.so.4
#3  0x00007f5509b86b74 in start_thread () from /lib/libpthread.so.0
#4  0x00007f550c61731d in clone () from /lib/libc.so.6

Thread 1 (Thread 0x7f550cbcd7a0 (LWP 16935)):
[KCrash Handler]
#6  0x00007f55096c2c08 in QGraphicsItem::isPanel (this=0x3175fe0) at graphicsview/qgraphicsitem.cpp:1661
#7  0x00007f55096f054d in QGraphicsScene::event (this=0x210e8c0, event=0x7ffff9092cf0) at graphicsview/qgraphicsscene.cpp:3435
#8  0x00007f5509278ab8 in QApplicationPrivate::notify_helper (this=0x20469e0, receiver=0x210e8c0, e=0x7ffff9092cf0) at kernel/qapplication.cpp:4300
#9  0x00007f550927a665 in QApplication::notify (this=0x2021ff0, receiver=0x210e8c0, e=0x7ffff9092cf0) at kernel/qapplication.cpp:4183
#10 0x00007f550aab68be in KApplication::notify (this=0x2021ff0, receiver=0x210e8c0, event=0x7ffff9092cf0)
    at /var/tmp/portage/kde-base/kdelibs-4.4.81/work/kdelibs-4.4.81/kdeui/kernel/kapplication.cpp:302
#11 0x00007f5509f0932b in QCoreApplication::notifyInternal (this=0x2021ff0, receiver=0x210e8c0, event=0x7ffff9092cf0) at kernel/qcoreapplication.cpp:704
#12 0x00007f5509705c38 in QGraphicsView::viewportEvent (this=0x23d9d50, event=0x7ffff9092cf0) at graphicsview/qgraphicsview.cpp:2692
#13 0x00007f5509f08766 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0x25dba50, event=0x7ffff9092cf0) at kernel/qcoreapplication.cpp:819
#14 0x00007f5509278aa8 in QApplicationPrivate::notify_helper (this=0x20469e0, receiver=0x25dba50, e=0x7ffff9092cf0) at kernel/qapplication.cpp:4296
#15 0x00007f550927a665 in QApplication::notify (this=0x2021ff0, receiver=0x25dba50, e=0x7ffff9092cf0) at kernel/qapplication.cpp:4183
#16 0x00007f550aab68be in KApplication::notify (this=0x2021ff0, receiver=0x25dba50, event=0x7ffff9092cf0)
    at /var/tmp/portage/kde-base/kdelibs-4.4.81/work/kdelibs-4.4.81/kdeui/kernel/kapplication.cpp:302
#17 0x00007f5509f0932b in QCoreApplication::notifyInternal (this=0x2021ff0, receiver=0x25dba50, event=0x7ffff9092cf0) at kernel/qcoreapplication.cpp:704
#18 0x00007f55092b9bbb in QWidget::event (this=<value optimized out>, event=0x7ffff9092cf0) at kernel/qwidget.cpp:8254
#19 0x00007f55095706ed in QFrame::event (this=0x23d9d50, e=0x7ffff9092cf0) at widgets/qframe.cpp:557
#20 0x00007f55095d4c53 in QAbstractScrollArea::event (this=0x23d9d50, e=0x7ffff9092cf0) at widgets/qabstractscrollarea.cpp:989
#21 0x00007f5509278ab8 in QApplicationPrivate::notify_helper (this=0x20469e0, receiver=0x23d9d50, e=0x7ffff9092cf0) at kernel/qapplication.cpp:4300
#22 0x00007f550927a665 in QApplication::notify (this=0x2021ff0, receiver=0x23d9d50, e=0x7ffff9092cf0) at kernel/qapplication.cpp:4183
#23 0x00007f550aab68be in KApplication::notify (this=0x2021ff0, receiver=0x23d9d50, event=0x7ffff9092cf0)
    at /var/tmp/portage/kde-base/kdelibs-4.4.81/work/kdelibs-4.4.81/kdeui/kernel/kapplication.cpp:302
#24 0x00007f5509f0932b in QCoreApplication::notifyInternal (this=0x2021ff0, receiver=0x23d9d50, event=0x7ffff9092cf0) at kernel/qcoreapplication.cpp:704
#25 0x00007f550927ede5 in QApplication::setActiveWindow (act=<value optimized out>) at kernel/qapplication.cpp:2450
#26 0x00007f55092d9982 in QApplication::x11ProcessEvent (this=0x2021ff0, event=0x7ffff9093380) at kernel/qapplication_x11.cpp:3420
#27 0x00007f55092fc026 in x11EventSourceDispatch (s=0x204a430, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#28 0x00007f5502687377 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#29 0x00007f5502689227 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#30 0x00007f550268930a in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#31 0x00007f5509f326e3 in QEventDispatcherGlib::processEvents (this=0x2006290, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#32 0x00007f55092fbcae in QGuiEventDispatcherGlib::processEvents (this=0x3175fe0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#33 0x00007f5509f07c82 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#34 0x00007f5509f08054 in QEventLoop::exec (this=0x7ffff9093670, flags=) at kernel/qeventloop.cpp:201
#35 0x00007f5509f0bd3b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#36 0x00007f550c8de3b8 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#37 0x00007f550c551bbd in __libc_start_main () from /lib/libc.so.6
#38 0x00000000004007a9 in _start ()

Possible duplicates by query: bug 240123, bug 237195, bug 236640, bug 236627, bug 235275.

Reported using DrKonqi