Application: plasma-desktop (0.4)
KDE Platform Version: 4.6.2 (4.6.2)
Qt Version: 4.7.2
Operating System: Linux 2.6.38-8-generic x86_64
Distribution: Ubuntu 11.04

-- Information about the crash:
I was adding the task manager to a panel.  It was an empty panel. I was doing a drag and drop.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fcb371a87a0 (LWP 1541))]

Thread 3 (Thread 0x7fcb15f30700 (LWP 1544)):
#0  0x00007fcb2bd753c4 in __pthread_mutex_lock (mutex=0x1cea928) at pthread_mutex_lock.c:61
#1  0x00007fcb2b46e0d3 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcb2b46ef9d in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fcb2b46f639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fcb33c9b446 in QEventDispatcherGlib::processEvents (this=0x1d367b0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007fcb33c6f882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007fcb33c6fabc in QEventLoop::exec (this=0x7fcb15f2fdb0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007fcb33b86924 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#8  0x00007fcb33c51c2f in QInotifyFileSystemWatcherEngine::run (this=0x1ce9f00) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007fcb33b89175 in QThreadPrivate::start (arg=0x1ce9f00) at thread/qthread_unix.cpp:320
#10 0x00007fcb2bd72d8c in start_thread (arg=0x7fcb15f30700) at pthread_create.c:304
#11 0x00007fcb36a9a04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fcb0e1da700 (LWP 1551)):
#0  0x00007fcb36a8cf03 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=<value optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fcb2b46f104 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcb2b46f639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fcb33c9b446 in QEventDispatcherGlib::processEvents (this=0x1f683f0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fcb33c6f882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fcb33c6fabc in QEventLoop::exec (this=0x7fcb0e1d9db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fcb33b86924 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#7  0x00007fcb33c51c2f in QInotifyFileSystemWatcherEngine::run (this=0x1f5d5a0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fcb33b89175 in QThreadPrivate::start (arg=0x1f5d5a0) at thread/qthread_unix.cpp:320
#9  0x00007fcb2bd72d8c in start_thread (arg=0x7fcb0e1da700) at pthread_create.c:304
#10 0x00007fcb36a9a04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fcb371a87a0 (LWP 1541)):
[KCrash Handler]
#6  deref (this=<value optimized out>, __in_chrg=<value optimized out>) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86_64.h:133
#7  cleanup (this=<value optimized out>, __in_chrg=<value optimized out>) at painting/qbrush.cpp:255
#8  ~QScopedPointer (this=<value optimized out>, __in_chrg=<value optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:100
#9  QBrush::~QBrush (this=<value optimized out>, __in_chrg=<value optimized out>) at painting/qbrush.cpp:573
#10 0x00007fcb3305fc54 in ~QPalettePrivate (this=<value optimized out>, __in_chrg=<value optimized out>) at kernel/qpalette.cpp:51
#11 QPalette::~QPalette (this=<value optimized out>, __in_chrg=<value optimized out>) at kernel/qpalette.cpp:729
#12 0x00007fcb3307bb69 in ~QWidgetData (this=0x33dd920, __in_chrg=<value optimized out>) at ../../include/QtGui/../../src/gui/kernel/qwidget.h:105
#13 QWidgetPrivate::~QWidgetPrivate (this=0x33dd920, __in_chrg=<value optimized out>) at kernel/qwidget.cpp:331
#14 0x00007fcb3307be19 in QWidgetPrivate::~QWidgetPrivate (this=0x33dd920, __in_chrg=<value optimized out>) at kernel/qwidget.cpp:342
#15 0x00007fcb33c87645 in cleanup (this=0x3482a70, __in_chrg=<value optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:62
#16 ~QScopedPointer (this=0x3482a70, __in_chrg=<value optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:100
#17 QObject::~QObject (this=0x3482a70, __in_chrg=<value optimized out>) at kernel/qobject.cpp:818
#18 0x00007fcb3307df70 in QWidget::~QWidget (this=0x3482a70, __in_chrg=<value optimized out>) at kernel/qwidget.cpp:1508
#19 0x00007fcb365dafb9 in Plasma::Dialog::~Dialog (this=0x3482a70, __in_chrg=<value optimized out>) at ../../plasma/dialog.cpp:417
#20 0x00007fcb36d8ac5f in PanelController::~PanelController (this=0x29f83f0, __in_chrg=<value optimized out>) at ../../../../plasma/desktop/shell/panelcontroller.cpp:241
#21 0x00007fcb36d8ac99 in PanelController::~PanelController (this=0x29f83f0, __in_chrg=<value optimized out>) at ../../../../plasma/desktop/shell/panelcontroller.cpp:242
#22 0x00007fcb33c844c8 in QObject::event (this=0x29f83f0, e=<value optimized out>) at kernel/qobject.cpp:1209
#23 0x00007fcb3308266d in QWidget::event (this=0x29f83f0, event=0x37b9020) at kernel/qwidget.cpp:8718
#24 0x00007fcb330319e4 in QApplicationPrivate::notify_helper (this=0x18baa60, receiver=0x29f83f0, e=0x37b9020) at kernel/qapplication.cpp:4462
#25 0x00007fcb330363aa in QApplication::notify (this=<value optimized out>, receiver=0x29f83f0, e=0x37b9020) at kernel/qapplication.cpp:4341
#26 0x00007fcb34928866 in KApplication::notify (this=0x188e700, receiver=0x29f83f0, event=0x37b9020) at ../../kdeui/kernel/kapplication.cpp:311
#27 0x00007fcb33c7049c in QCoreApplication::notifyInternal (this=0x188e700, receiver=0x29f83f0, event=0x37b9020) at kernel/qcoreapplication.cpp:731
#28 0x00007fcb33c73c25 in sendEvent (receiver=0x0, event_type=0, data=0x183db60) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#29 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x183db60) at kernel/qcoreapplication.cpp:1372
#30 0x00007fcb33c9b253 in sendPostedEvents (s=0x18bddc0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#31 postEventSourceDispatch (s=0x18bddc0) at kernel/qeventdispatcher_glib.cpp:277
#32 0x00007fcb2b46ebcd in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007fcb2b46f3a8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007fcb2b46f639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007fcb33c9b3ef in QEventDispatcherGlib::processEvents (this=0x183d340, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#36 0x00007fcb330d8dfe in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#37 0x00007fcb33c6f882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#38 0x00007fcb33c6fabc in QEventLoop::exec (this=0x7fff8e0cd9f0, flags=...) at kernel/qeventloop.cpp:201
#39 0x00007fcb33c73ecb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#40 0x00007fcb36d86897 in kdemain (argc=1, argv=0x7fff8e0cddb8) at ../../../../plasma/desktop/shell/main.cpp:118
#41 0x00007fcb369d2eff in __libc_start_main (main=0x400740 <main(int, char**)>, argc=1, ubp_av=0x7fff8e0cddb8, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fff8e0cdda8) at libc-start.c:226
#42 0x0000000000400669 in _start ()

Possible duplicates by query: bug 274353, bug 271225, bug 269945, bug 263657, bug 262947.

Reported using DrKonqi