Application: plasma-desktop (0.3)
KDE Platform Version: 4.4.2 (KDE 4.4.2)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-22-generic i686
Distribution: Ubuntu 10.04 LTS

-- Information about the crash:
I cannot add a Task Manager. It was vanished after OS startup. Plasma crashes when try to add a Task manager anywhere on the bottom panel either between App launcher or desktops navigator or system try etc.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb7787aa0 (LWP 1661))]

Thread 2 (Thread 0xaac15b70 (LWP 1663)):
#0  __pthread_mutex_unlock (mutex=0x9201aa4) at pthread_mutex_unlock.c:289
#1  0x0131fab8 in g_main_context_prepare () from /lib/libglib-2.0.so.0
#2  0x0131fee9 in ?? () from /lib/libglib-2.0.so.0
#3  0x013204b8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#4  0x051d060f in QEventDispatcherGlib::processEvents (this=0x92013d8, flags=...) at kernel/qeventdispatcher_glib.cpp:414
#5  0x051a3059 in QEventLoop::processEvents (this=0xaac15290, flags=) at kernel/qeventloop.cpp:149
#6  0x051a34aa in QEventLoop::exec (this=0xaac15290, flags=...) at kernel/qeventloop.cpp:201
#7  0x0509f5a8 in QThread::exec (this=0x91f7fe8) at thread/qthread.cpp:487
#8  0x05182c1b in QInotifyFileSystemWatcherEngine::run (this=0x91f7fe8) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x050a232e in QThreadPrivate::start (arg=0x91f7fe8) at thread/qthread_unix.cpp:248
#10 0x00e9d96e in start_thread (arg=0xaac15b70) at pthread_create.c:300
#11 0x002d3a4e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 1 (Thread 0xb7787aa0 (LWP 1661)):
[KCrash Handler]
#6  0x0509cf39 in QMutex::lock (this=0x8e10c78) at thread/qmutex.cpp:150
#7  0x051a4634 in QCoreApplication::postEvent (receiver=0x94f7e98, event=0x91f9a48, priority=0) at kernel/qcoreapplication.cpp:1113
#8  0x051a49ac in QCoreApplication::postEvent (receiver=0x94f7e98, event=0x91f9a48) at kernel/qcoreapplication.cpp:1066
#9  0x051b48a4 in QObject::deleteLater (this=0x94f7e98) at kernel/qobject.cpp:2158
#10 0x05d16a25 in QX11Data::xdndHandleFinished (this=0x8dda198, xe=0xbfa5ff3c, passive=false) at kernel/qdnd_x11.cpp:1239
#11 0x05cf6eb6 in QApplication::x11ClientMessage (this=0x8dd09b8, w=0x92ba748, event=0xbfa5ff3c, passive_only=false) at kernel/qapplication_x11.cpp:3090
#12 0x05d06879 in QApplication::x11ProcessEvent (this=0x8dd09b8, event=0xbfa5ff3c) at kernel/qapplication_x11.cpp:3633
#13 0x05d3660a in x11EventSourceDispatch (s=0x8dd9840, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#14 0x0131c5e5 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#15 0x013202d8 in ?? () from /lib/libglib-2.0.so.0
#16 0x013204b8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#17 0x051d05d5 in QEventDispatcherGlib::processEvents (this=0x8dd69b0, flags=...) at kernel/qeventdispatcher_glib.cpp:412
#18 0x05d36135 in QGuiEventDispatcherGlib::processEvents (this=0x8dd69b0, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#19 0x051a3059 in QEventLoop::processEvents (this=0xbfa60234, flags=) at kernel/qeventloop.cpp:149
#20 0x051a34aa in QEventLoop::exec (this=0xbfa60234, flags=...) at kernel/qeventloop.cpp:201
#21 0x051a769f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#22 0x05c76577 in QApplication::exec () at kernel/qapplication.cpp:3579
#23 0x0290805e in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#24 0x0804e133 in _start ()

Possible duplicates by query: bug 242629, bug 242181, bug 238537, bug 236374, bug 235790.

Reported using DrKonqi