Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.2 (4.7.2)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-13-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed: I was shutting down my pc. the problem occurs almost every time I turn off or reboot

The crash can be reproduced some of the time.

-- Backtrace:
Application: Shell del desktop di Plasma (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7facac52d7a0 (LWP 1924))]

Thread 3 (Thread 0x7fac8bb3d700 (LWP 1927)):
#0  0x00007faca0ea61fd in __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x2929798) at pthread_mutex_unlock.c:290
#2  0x00007faca03953f5 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007faca0395e6a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007faca0396429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007faca8ffcf3e in QEventDispatcherGlib::processEvents (this=0x29296a0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007faca8fd0cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007faca8fd0ef7 in QEventLoop::exec (this=0x7fac8bb3cdb0, flags=...) at kernel/qeventloop.cpp:201
#8  0x00007faca8ee827f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#9  0x00007faca8fb3cbf in QInotifyFileSystemWatcherEngine::run (this=0x29284a0) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007faca8eead05 in QThreadPrivate::start (arg=0x29284a0) at thread/qthread_unix.cpp:331
#11 0x00007faca0ea2efc in start_thread (arg=0x7fac8bb3d700) at pthread_create.c:304
#12 0x00007facabe1689d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fac823e0700 (LWP 1931)):
#0  socketNotifierSourcePrepare (timeout=0x7fac823dfc1c) at kernel/qeventdispatcher_glib.cpp:76
#1  0x00007faca0394ff2 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007faca0395dfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007faca0396429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007faca8ffcf3e in QEventDispatcherGlib::processEvents (this=0x2df3ea0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007faca8fd0cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007faca8fd0ef7 in QEventLoop::exec (this=0x7fac823dfdb0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007faca8ee827f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007faca8fb3cbf in QInotifyFileSystemWatcherEngine::run (this=0x2db2660) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007faca8eead05 in QThreadPrivate::start (arg=0x2db2660) at thread/qthread_unix.cpp:331
#10 0x00007faca0ea2efc in start_thread (arg=0x7fac823e0700) at pthread_create.c:304
#11 0x00007facabe1689d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7facac52d7a0 (LWP 1924)):
[KCrash Handler]
#6  QGraphicsLayoutItem::setParentLayoutItem (this=0x3e40ed0, parent=0x0) at graphicsview/qgraphicslayoutitem.cpp:856
#7  0x00007fac92407cdf in SystemTray::CompactLayout::removeItem (this=0x2af1420, item=0x3e40ed0) at ../../../../../plasma/generic/applets/systemtray/ui/compactlayout.cpp:127
#8  0x00007fac9240bbc7 in SystemTray::TaskArea::addWidgetForTask (this=0x2aefb40, task=0x2e3dd00) at ../../../../../plasma/generic/applets/systemtray/ui/taskarea.cpp:280
#9  0x00007fac9240c926 in SystemTray::TaskArea::addTask (this=0x2aefb40, task=<optimized out>) at ../../../../../plasma/generic/applets/systemtray/ui/taskarea.cpp:196
#10 0x00007fac9240d124 in SystemTray::TaskArea::qt_metacall (this=0x2aefb40, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x7ffff684fb90) at ./taskarea.moc:89
#11 0x00007faca8fe4eba in QMetaObject::activate (sender=0x269bc80, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7ffff684fb90) at kernel/qobject.cpp:3278
#12 0x00007fac923ef8c2 in SystemTray::Manager::taskChanged (this=<optimized out>, _t1=0x2e3dd00) at ./manager.moc:106
#13 0x00007fac923efc24 in SystemTray::Manager::qt_metacall (this=0x269bc80, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x7ffff684fca0) at ./manager.moc:84
#14 0x00007faca8fe4eba in QMetaObject::activate (sender=0x2e3dd00, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7ffff684fca0) at kernel/qobject.cpp:3278
#15 0x00007fac923f045f in SystemTray::Task::changed (this=<optimized out>, _t1=0x2e3dd00) at ./task.moc:112
#16 0x00007fac923f0731 in SystemTray::Task::widgetDeleted (this=0x2e3dd00) at ../../../../../plasma/generic/applets/systemtray/core/task.cpp:129
#17 0x00007fac923f09f4 in SystemTray::Task::qt_metacall (this=0x2e3dd00, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x7ffff684fe30) at ./task.moc:100
#18 0x00007fac923f1430 in SystemTray::FdoTask::qt_metacall (this=0x2e3dd00, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x7ffff684fe30) at ./fdotask.moc:67
#19 0x00007faca8fe4eba in QMetaObject::activate (sender=0x3e40eb0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7ffff684fe30) at kernel/qobject.cpp:3278
#20 0x00007faca8fe536f in QObject::destroyed (this=<optimized out>, _t1=0x3e40eb0) at .moc/release-shared/moc_qobject.cpp:149
#21 0x00007faca8fe8ef7 in QObject::~QObject (this=0x3e40eb0, __in_chrg=<optimized out>) at kernel/qobject.cpp:843
#22 0x00007faca89a4548 in ~QGraphicsObject (this=0x3e40eb0, __in_chrg=<optimized out>) at ../../include/QtGui/../../src/gui/graphicsview/qgraphicsitem.h:547
#23 QGraphicsWidget::~QGraphicsWidget (this=0x3e40eb0, __in_chrg=<optimized out>) at graphicsview/qgraphicswidget.cpp:232
#24 0x00007fac923f1709 in SystemTray::FdoGraphicsWidget::~FdoGraphicsWidget (this=0x3e40eb0, __in_chrg=<optimized out>) at ../../../../../plasma/generic/applets/systemtray/protocols/fdo/fdographicswidget.cpp:77
#25 0x00007faca8954dc6 in QGraphicsItem::~QGraphicsItem (this=0x266f770, __in_chrg=<optimized out>) at graphicsview/qgraphicsitem.cpp:1488
#26 0x00007faca89a4540 in ~QGraphicsObject (this=0x266f760, __in_chrg=<optimized out>) at ../../include/QtGui/../../src/gui/graphicsview/qgraphicsitem.h:547
#27 QGraphicsWidget::~QGraphicsWidget (this=0x266f760, __in_chrg=<optimized out>) at graphicsview/qgraphicswidget.cpp:232
#28 0x00007fac9240a439 in SystemTray::TaskArea::~TaskArea (this=0x266f760, __in_chrg=<optimized out>) at ../../../../../plasma/generic/applets/systemtray/ui/taskarea.cpp:147
#29 0x00007fac92402b4d in SystemTray::Applet::~Applet (this=0x26a02e0, __in_chrg=<optimized out>) at ../../../../../plasma/generic/applets/systemtray/ui/applet.cpp:145
#30 0x00007fac92402d59 in SystemTray::Applet::~Applet (this=0x26a02e0, __in_chrg=<optimized out>) at ../../../../../plasma/generic/applets/systemtray/ui/applet.cpp:163
#31 0x00007facab9245ef in qDeleteAll<QList<Plasma::Applet*>::const_iterator> (end=<optimized out>, begin=<optimized out>) at /usr/include/qt4/QtCore/qalgorithms.h:322
#32 qDeleteAll<QList<Plasma::Applet*> > (c=...) at /usr/include/qt4/QtCore/qalgorithms.h:330
#33 ~ContainmentPrivate (this=0x24df0f0, __in_chrg=<optimized out>) at ../../plasma/private/containment_p.h:70
#34 Plasma::Containment::~Containment (this=0x254bc40, __in_chrg=<optimized out>) at ../../plasma/containment.cpp:148
#35 0x00007fac92a42b39 in Panel::~Panel (this=0x254bc40, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/containments/panel/panel.cpp:129
#36 0x00007facab9379f7 in qDeleteAll<QList<Plasma::Containment*>::const_iterator> (end=<optimized out>, begin=<optimized out>) at /usr/include/qt4/QtCore/qalgorithms.h:322
#37 qDeleteAll<QList<Plasma::Containment*> > (c=...) at /usr/include/qt4/QtCore/qalgorithms.h:330
#38 Plasma::CoronaPrivate::~CoronaPrivate (this=0x22114d0, __in_chrg=<optimized out>) at ../../plasma/corona.cpp:805
#39 0x00007facab937c24 in Plasma::Corona::~Corona (this=0x2214bb0, __in_chrg=<optimized out>) at ../../plasma/corona.cpp:82
#40 0x00007facac109829 in DesktopCorona::~DesktopCorona (this=0x2214bb0, __in_chrg=<optimized out>) at ../../../../plasma/desktop/shell/desktopcorona.cpp:73
#41 0x00007facac12b146 in PlasmaApp::cleanup (this=0x2204c90) at ../../../../plasma/desktop/shell/plasmaapp.cpp:381
#42 0x00007facac12ff4f in PlasmaApp::qt_metacall (this=0x2204c90, _c=QMetaObject::InvokeMetaMethod, _id=15, _a=0x7ffff6850370) at ./plasmaapp.moc:143
#43 0x00007faca8fe4eba in QMetaObject::activate (sender=0x2204c90, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3278
#44 0x00007faca8fd57e5 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1069
#45 0x00007facac1151a3 in kdemain (argc=1, argv=0x7ffff68507c8) at ../../../../plasma/desktop/shell/main.cpp:120
#46 0x00007facabd5630d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7ffff68507c8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffff68507b8) at libc-start.c:226
#47 0x0000000000400671 in _start ()

This bug may be a duplicate of or related to bug 281557.

Possible duplicates by query: bug 285590, bug 283937, bug 282269, bug 281557, bug 280449.

Reported using DrKonqi