Application: plasma-desktop (0.4)
KDE Platform Version: 4.8.4 (4.8.4)
Qt Version: 4.8.1
Operating System: Linux 3.2.0-27-generic x86_64
Distribution: Ubuntu 12.04 LTS

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

I have two screens, each with a separate panel. One of them had started to behave strangely, I was not able to change its settings - they closed themselves within less than a second (probably 1/10 of a second or so) after opening. So I decided to create a new panel on that screen, add the same widgets to it as I had on the borked one and then remove the strangely-behaving panel. When closing it, I got this crash notice.

- Unusual behavior I noticed:

A crash notice, but no further apparent problems afterwards.

-- Backtrace:
Application: Plasma-Desktop-Umgebung (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7febe383c7c0 (LWP 3779))]

Thread 4 (Thread 0x7febbd06f700 (LWP 3780)):
#0  0x00007febe30feb03 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007febd7208036 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007febd7208164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007febe02aa426 in QEventDispatcherGlib::processEvents (this=0x7febb80008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007febe0279c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007febe0279ed7 in QEventLoop::exec (this=0x7febbd06ecd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007febe0178fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007febe02599ff in QInotifyFileSystemWatcherEngine::run (this=0x7d1d70) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007febe017bfcb in QThreadPrivate::start (arg=0x7d1d70) at thread/qthread_unix.cpp:298
#9  0x00007febd44cfb74 in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#10 0x00007febd7b17e9a in start_thread (arg=0x7febbd06f700) at pthread_create.c:308
#11 0x00007febe310a4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7febb775f700 (LWP 3781)):
#0  0x00007febe30feb03 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007febd7208036 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007febd7208164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007febe02aa426 in QEventDispatcherGlib::processEvents (this=0x7febb00008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007febe0279c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007febe0279ed7 in QEventLoop::exec (this=0x7febb775ecd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007febe0178fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007febe02599ff in QInotifyFileSystemWatcherEngine::run (this=0x265fc50) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007febe017bfcb in QThreadPrivate::start (arg=0x265fc50) at thread/qthread_unix.cpp:298
#9  0x00007febd44cfb74 in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#10 0x00007febd7b17e9a in start_thread (arg=0x7febb775f700) at pthread_create.c:308
#11 0x00007febe310a4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7febaffff700 (LWP 3784)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007febdd055222 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007febdd055259 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007febd44cfb74 in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#4  0x00007febd7b17e9a in start_thread (arg=0x7febaffff700) at pthread_create.c:308
#5  0x00007febe310a4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7febe383c7c0 (LWP 3779)):
[KCrash Handler]
#6  0x0000000000000040 in ?? ()
#7  0x00007febe0290a78 in QObject::connect (sender=0x382fde0, signal=0x7febc3a61478 "2destroyed()", receiver=0x9219d0, method=0x7febc3a61467 "1widgetDeleted()", type=Qt::AutoConnection) at kernel/qobject.cpp:2551
#8  0x00007febc3a42e68 in SystemTray::Task::widget (this=0x9219d0, host=0x1b885e0, createIfNecessary=<optimized out>) at ../../../../../plasma/generic/applets/systemtray/core/task.cpp:83
#9  0x00007febc3a5dc66 in SystemTray::TaskArea::addWidgetForTask (this=0x1b81ef0, task=0x9219d0) at ../../../../../plasma/generic/applets/systemtray/ui/taskarea.cpp:265
#10 0x00007febc3a5e326 in SystemTray::TaskArea::addTask (this=0x1b81ef0, task=<optimized out>) at ../../../../../plasma/generic/applets/systemtray/ui/taskarea.cpp:196
#11 0x00007febe028f281 in QMetaObject::activate (sender=0xf74c00, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff6fbccaf0) at kernel/qobject.cpp:3547
#12 0x00007febc3a419b2 in SystemTray::Manager::taskChanged (this=<optimized out>, _t1=0x9219d0) at ./manager.moc:120
#13 0x00007febe028f281 in QMetaObject::activate (sender=0x9219d0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff6fbccc40) at kernel/qobject.cpp:3547
#14 0x00007febc3a428af in SystemTray::Task::changed (this=<optimized out>, _t1=0x9219d0) at ./task.moc:128
#15 0x00007febe0294446 in QObject::event (this=0x9219d0, e=<optimized out>) at kernel/qobject.cpp:1195
#16 0x00007febdf5fb894 in notify_helper (e=0x38463c0, receiver=0x9219d0, this=0x72d070) at kernel/qapplication.cpp:4559
#17 QApplicationPrivate::notify_helper (this=0x72d070, receiver=0x9219d0, e=0x38463c0) at kernel/qapplication.cpp:4531
#18 0x00007febdf600713 in QApplication::notify (this=0x6cfaa0, receiver=0x9219d0, e=0x38463c0) at kernel/qapplication.cpp:4420
#19 0x00007febe0f679e6 in KApplication::notify (this=0x6cfaa0, receiver=0x9219d0, event=0x38463c0) at ../../kdeui/kernel/kapplication.cpp:311
#20 0x00007febe027ae9c in QCoreApplication::notifyInternal (this=0x6cfaa0, receiver=0x9219d0, event=0x38463c0) at kernel/qcoreapplication.cpp:876
#21 0x00007febe027ec6a in sendEvent (event=0x38463c0, receiver=0x9219d0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#22 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x6271f0) at kernel/qcoreapplication.cpp:1500
#23 0x00007febe02a9f93 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#24 postEventSourceDispatch (s=<optimized out>) at kernel/qeventdispatcher_glib.cpp:279
#25 0x00007febd7207d53 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007febd72080a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007febd7208164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007febe02aa3bf in QEventDispatcherGlib::processEvents (this=0x628ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#29 0x00007febdf6a3d5e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#30 0x00007febe0279c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#31 0x00007febe0279ed7 in QEventLoop::exec (this=0x7fff6fbcd550, flags=...) at kernel/qeventloop.cpp:204
#32 0x00007febe027ef67 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#33 0x00007febe3419a13 in kdemain (argc=1, argv=0x7fff6fbcd938) at ../../../../plasma/desktop/shell/main.cpp:120
#34 0x00007febe303976d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff6fbcd938, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff6fbcd928) at libc-start.c:226
#35 0x0000000000400671 in _start ()

This bug may be a duplicate of or related to bug 290712.

Possible duplicates by query: bug 304060, bug 302501, bug 301768, bug 300794, bug 300680.

Reported using DrKonqi