Bug 304748

Application: systemsettings (1.0)
KDE Platform Version: 4.9.00
Qt Version: 4.8.1
Operating System: Linux 3.2.0-27-generic x86_64
Distribution: Ubuntu 12.04 LTS

-- Information about the crash:
- Unusual behavior I noticed:
I had two desktops; 'Plasma-Desktop' and 'Desktop'. I could access one at a time through the application switcher and 'Desktop' would appear when I switched virtual desktops. I have been customizing my Plasma-Desktops, but the 'Desktop' appears to be from Gnome, even once i uninstalled it.

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings (systemsettings), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f1e0a240780 (LWP 2212))]

Thread 2 (Thread 0x7f1ded8ce700 (LWP 2222)):
#0  0x00007f1e071d9b03 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f1e0092d036 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f1e0092d164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1e0795a426 in QEventDispatcherGlib::processEvents (this=0x7f1de80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f1e07929c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f1e07929ed7 in QEventLoop::exec (this=0x7f1ded8cddd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f1e07828fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007f1e079099ff in QInotifyFileSystemWatcherEngine::run (this=0x1934a60) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f1e0782bfcb in QThreadPrivate::start (arg=0x1934a60) at thread/qthread_unix.cpp:298
#9  0x00007f1e00df9e9a in start_thread (arg=0x7f1ded8ce700) at pthread_create.c:308
#10 0x00007f1e071e54bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f1e0a240780 (LWP 2212)):
[KCrash Handler]
#6  deref (this=0x10) at /usr/include/qt4/QtCore/qatomic_x86_64.h:133
#7  operator= (other=..., this=0x1acf0b0) at /usr/include/qt4/QtCore/qhash.h:596
#8  clear (this=0x1acf0b0) at /usr/include/qt4/QtCore/qhash.h:576
#9  clear (this=0x1acf0a0) at /usr/include/qt4/QtCore/qcache.h:140
#10 ~QCache (this=0x1acf0a0, __in_chrg=<optimized out>) at /usr/include/qt4/QtCore/qcache.h:103
#11 ~ShadowCache (this=0x1acef80, __in_chrg=<optimized out>) at ../../../../libs/oxygen/oxygenshadowcache.h:51
#12 Oxygen::Factory::~Factory (this=0x1acebf0, __in_chrg=<optimized out>) at ../../../../kwin/clients/oxygen/oxygenfactory.cpp:58
#13 0x00007f1deca539a9 in Oxygen::Factory::~Factory (this=0x1acebf0, __in_chrg=<optimized out>) at ../../../../kwin/clients/oxygen/oxygenfactory.cpp:59
#14 0x00007f1decc6fd9a in KDecorationPlugins::destroyPreviousPlugin (this=0x1a795c0) at ../../../kwin/libkdecorations/kdecoration_plugins_p.cpp:201
#15 0x00007f1decea83fa in KWin::DecorationModel::regeneratePreview (this=0x1a78ea0, index=..., size=...) at ../../../../kwin/kcmkwin/kwindecoration/decorationmodel.cpp:296
#16 0x00007f1e0793f281 in QMetaObject::activate (sender=0x1a78de0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff9e643b40) at kernel/qobject.cpp:3547
#17 0x00007f1dece9a357 in KWin::DecorationDelegate::regeneratePreview (this=<optimized out>, _t1=..., _t2=...) at moc_decorationdelegate.cpp:99
#18 0x00007f1decea6f9f in KWin::DecorationDelegate::paint (this=0x1a78de0, painter=0x7fff9e643e50, option=..., index=...) at ../../../../kwin/kcmkwin/kwindecoration/decorationdelegate.cpp:50
#19 0x00007f1e08aed171 in QListView::paintEvent (this=0x1a5b150, e=<optimized out>) at itemviews/qlistview.cpp:1039
#20 0x00007f1e085f20f6 in QWidget::event (this=0x1a5b150, event=0x7fff9e644ac0) at kernel/qwidget.cpp:8508
#21 0x00007f1e089b23b6 in QFrame::event (this=0x1a5b150, e=0x7fff9e644ac0) at widgets/qframe.cpp:557
#22 0x00007f1e08ac689b in QAbstractItemView::viewportEvent (this=0x1a5b150, event=0x7fff9e644ac0) at itemviews/qabstractitemview.cpp:1644
#23 0x00007f1e0792b028 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<optimized out>, receiver=0x1a61bf0, event=0x7fff9e644ac0) at kernel/qcoreapplication.cpp:986
#24 0x00007f1e085a185f in notify_helper (e=0x7fff9e644ac0, receiver=0x1a61bf0, this=0x1313980) at kernel/qapplication.cpp:4555
#25 QApplicationPrivate::notify_helper (this=0x1313980, receiver=0x1a61bf0, e=0x7fff9e644ac0) at kernel/qapplication.cpp:4531
#26 0x00007f1e085a6713 in QApplication::notify (this=0x7fff9e64a300, receiver=0x1a61bf0, e=0x7fff9e644ac0) at kernel/qapplication.cpp:4420
#27 0x00007f1e092db456 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#28 0x00007f1e0792ae9c in QCoreApplication::notifyInternal (this=0x7fff9e64a300, receiver=0x1a61bf0, event=0x7fff9e644ac0) at kernel/qcoreapplication.cpp:876
#29 0x00007f1e085edd96 in sendSpontaneousEvent (event=0x7fff9e644ac0, receiver=0x1a61bf0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#30 QWidgetPrivate::drawWidget (this=0x1a631d0, pdev=0x1307af0, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5585
#31 0x00007f1e085eea0f in QWidgetPrivate::paintSiblingsRecursive (this=0x1a664b0, pdev=0x1307af0, siblings=..., index=<optimized out>, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5794
#32 0x00007f1e085ee797 in QWidgetPrivate::paintSiblingsRecursive (this=0x1a664b0, pdev=0x1307af0, siblings=..., index=2, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5781
#33 0x00007f1e085ee797 in QWidgetPrivate::paintSiblingsRecursive (this=0x1a664b0, pdev=0x1307af0, siblings=..., index=3, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5781
#34 0x00007f1e085ee797 in QWidgetPrivate::paintSiblingsRecursive (this=0x1a664b0, pdev=0x1307af0, siblings=..., index=4, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5781
#35 0x00007f1e085ee797 in QWidgetPrivate::paintSiblingsRecursive (this=0x1a664b0, pdev=0x1307af0, siblings=..., index=5, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5781
#36 0x00007f1e085ee797 in QWidgetPrivate::paintSiblingsRecursive (this=0x1a664b0, pdev=0x1307af0, siblings=..., index=7, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5781
#37 0x00007f1e085edacc in QWidgetPrivate::drawWidget (this=0x1a664b0, pdev=0x1307af0, rgn=..., offset=..., flags=<optimized out>, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5638
#38 0x00007f1e085eea0f in QWidgetPrivate::paintSiblingsRecursive (this=0x1a615d0, pdev=0x1307af0, siblings=..., index=<optimized out>, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5794
#39 0x00007f1e085ee797 in QWidgetPrivate::paintSiblingsRecursive (this=0x1a615d0, pdev=0x1307af0, siblings=..., index=2, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5781
#40 0x00007f1e085ee797 in QWidgetPrivate::paintSiblingsRecursive (this=0x1a615d0, pdev=0x1307af0, siblings=..., index=3, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5781
#41 0x00007f1e085ee797 in QWidgetPrivate::paintSiblingsRecursive (this=0x1a615d0, pdev=0x1307af0, siblings=..., index=4, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5781
#42 0x00007f1e085edacc in QWidgetPrivate::drawWidget (this=0x1a615d0, pdev=0x1307af0, rgn=..., offset=..., flags=<optimized out>, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5638
#43 0x00007f1e085eea0f in QWidgetPrivate::paintSiblingsRecursive (this=0x1a58e90, pdev=0x1307af0, siblings=..., index=<optimized out>, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5794
#44 0x00007f1e085edacc in QWidgetPrivate::drawWidget (this=0x1a58e90, pdev=0x1307af0, rgn=..., offset=..., flags=<optimized out>, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5638
#45 0x00007f1e085eea0f in QWidgetPrivate::paintSiblingsRecursive (this=0x1a5ab00, pdev=0x1307af0, siblings=..., index=<optimized out>, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5794
#46 0x00007f1e085edacc in QWidgetPrivate::drawWidget (this=0x1a5ab00, pdev=0x1307af0, rgn=..., offset=..., flags=<optimized out>, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5638
#47 0x00007f1e085eea0f in QWidgetPrivate::paintSiblingsRecursive (this=0x15f5b90, pdev=0x1307af0, siblings=..., index=<optimized out>, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5794
#48 0x00007f1e085edacc in QWidgetPrivate::drawWidget (this=0x15f5b90, pdev=0x1307af0, rgn=..., offset=..., flags=<optimized out>, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5638
#49 0x00007f1e085eea0f in QWidgetPrivate::paintSiblingsRecursive (this=0x1650f10, pdev=0x1307af0, siblings=..., index=<optimized out>, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5794
#50 0x00007f1e085edacc in QWidgetPrivate::drawWidget (this=0x1650f10, pdev=0x1307af0, rgn=..., offset=..., flags=<optimized out>, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5638
#51 0x00007f1e085eea0f in QWidgetPrivate::paintSiblingsRecursive (this=0x1739b90, pdev=0x1307af0, siblings=..., index=<optimized out>, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5794
#52 0x00007f1e085edacc in QWidgetPrivate::drawWidget (this=0x1739b90, pdev=0x1307af0, rgn=..., offset=..., flags=<optimized out>, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5638
#53 0x00007f1e085eea0f in QWidgetPrivate::paintSiblingsRecursive (this=0x1739580, pdev=0x1307af0, siblings=..., index=<optimized out>, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5794
#54 0x00007f1e085ee797 in QWidgetPrivate::paintSiblingsRecursive (this=0x1739580, pdev=0x1307af0, siblings=..., index=1, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5781
#55 0x00007f1e085ee797 in QWidgetPrivate::paintSiblingsRecursive (this=0x1739580, pdev=0x1307af0, siblings=..., index=3, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5781
#56 0x00007f1e085edacc in QWidgetPrivate::drawWidget (this=0x1739580, pdev=0x1307af0, rgn=..., offset=..., flags=<optimized out>, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5638
#57 0x00007f1e085eea0f in QWidgetPrivate::paintSiblingsRecursive (this=0x1739080, pdev=0x1307af0, siblings=..., index=<optimized out>, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5794
#58 0x00007f1e085ee797 in QWidgetPrivate::paintSiblingsRecursive (this=0x1739080, pdev=0x1307af0, siblings=..., index=1, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5781
#59 0x00007f1e085edacc in QWidgetPrivate::drawWidget (this=0x1739080, pdev=0x1307af0, rgn=..., offset=..., flags=<optimized out>, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5638
#60 0x00007f1e085eea0f in QWidgetPrivate::paintSiblingsRecursive (this=0x1738c20, pdev=0x1307af0, siblings=..., index=<optimized out>, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5794
#61 0x00007f1e085edacc in QWidgetPrivate::drawWidget (this=0x1738c20, pdev=0x1307af0, rgn=..., offset=..., flags=<optimized out>, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5638
#62 0x00007f1e085eea0f in QWidgetPrivate::paintSiblingsRecursive (this=0x144abc0, pdev=0x1307af0, siblings=..., index=<optimized out>, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5794
#63 0x00007f1e085edacc in QWidgetPrivate::drawWidget (this=0x144abc0, pdev=0x1307af0, rgn=..., offset=..., flags=<optimized out>, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5638
#64 0x00007f1e085eea0f in QWidgetPrivate::paintSiblingsRecursive (this=0x1482fb0, pdev=0x1307af0, siblings=..., index=<optimized out>, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5794
#65 0x00007f1e085ee797 in QWidgetPrivate::paintSiblingsRecursive (this=0x1482fb0, pdev=0x1307af0, siblings=..., index=13, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5781
#66 0x00007f1e085edacc in QWidgetPrivate::drawWidget (this=0x1482fb0, pdev=0x1307af0, rgn=..., offset=..., flags=<optimized out>, sharedPainter=0x0, backingStore=0x14612e0) at kernel/qwidget.cpp:5638
#67 0x00007f1e087beb58 in QWidgetBackingStore::sync (this=0x14612e0) at painting/qbackingstore.cpp:1373
#68 0x00007f1e085e4ac0 in QWidgetPrivate::syncBackingStore (this=0x1482fb0) at kernel/qwidget.cpp:1891
#69 0x00007f1e085f260c in QWidget::event (this=0x1482d90, event=0x16e3b10) at kernel/qwidget.cpp:8655
#70 0x00007f1e089cbc4b in QMainWindow::event (this=0x1482d90, event=0x16e3b10) at widgets/qmainwindow.cpp:1478
#71 0x00007f1e093d7638 in KXmlGuiWindow::event(QEvent*) () from /usr/lib/libkdeui.so.5
#72 0x00007f1e085a1894 in notify_helper (e=0x16e3b10, receiver=0x1482d90, this=0x1313980) at kernel/qapplication.cpp:4559
#73 QApplicationPrivate::notify_helper (this=0x1313980, receiver=0x1482d90, e=0x16e3b10) at kernel/qapplication.cpp:4531
#74 0x00007f1e085a6713 in QApplication::notify (this=0x7fff9e64a300, receiver=0x1482d90, e=0x16e3b10) at kernel/qapplication.cpp:4420
#75 0x00007f1e092db456 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#76 0x00007f1e0792ae9c in QCoreApplication::notifyInternal (this=0x7fff9e64a300, receiver=0x1482d90, event=0x16e3b10) at kernel/qcoreapplication.cpp:876
#77 0x00007f1e0792ec6a in sendEvent (event=0x16e3b10, receiver=0x1482d90) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#78 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x12d31f0) at kernel/qcoreapplication.cpp:1500
#79 0x00007f1e07959f93 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#80 postEventSourceDispatch (s=<optimized out>) at kernel/qeventdispatcher_glib.cpp:279
#81 0x00007f1e0092cd53 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#82 0x00007f1e0092d0a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#83 0x00007f1e0092d164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#84 0x00007f1e0795a3bf in QEventDispatcherGlib::processEvents (this=0x12d4ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#85 0x00007f1e08649d5e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#86 0x00007f1e07929c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#87 0x00007f1e07929ed7 in QEventLoop::exec (this=0x7fff9e64a290, flags=...) at kernel/qeventloop.cpp:204
#88 0x00007f1e0792ef67 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#89 0x000000000040a9e5 in ?? ()
#90 0x00007f1e0711476d in __libc_start_main (main=0x40a5d0, argc=5, ubp_av=0x7fff9e64a5c8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff9e64a5b8) at libc-start.c:226
#91 0x000000000040aa39 in _start ()

Possible duplicates by query: bug 257646.

Reported using DrKonqi