Application: kmail (1.13.5)
KDE Platform Version: 4.4.5 (KDE 4.4.5)
Qt Version: 4.6.3
Operating System: Linux 2.6.32-trunk-amd64 x86_64
Distribution: Debian GNU/Linux testing (wheezy)

-- Information about the crash:
As I suggested above, kmail was sitting quietly in the background, doing nothing at all. I was in my Opera browser and had reason to close a number of identical windows that had opened up without my knowledge -- from KDE. This crash happened just as I finished that task.

Thank you  very much for this opportunity to help out!

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[KCrash Handler]
#5  deref (this=0x2b57290, __in_chrg=<value optimized out>) at /usr/include/qt4/QtCore/qatomic_x86_64.h:133
#6  ~QList (this=0x2b57290, __in_chrg=<value optimized out>) at /usr/include/qt4/QtCore/qlist.h:620
#7  ~QStringList (this=0x2b57290, __in_chrg=<value optimized out>) at /usr/include/qt4/QtCore/qstringlist.h:67
#8  ~Private (this=0x2b57290, __in_chrg=<value optimized out>) at ../../kdeui/icons/kiconengine.cpp:29
#9  KIconEngine::~KIconEngine (this=0x2b57290, __in_chrg=<value optimized out>) at ../../kdeui/icons/kiconengine.cpp:53
#10 0x00007fb58ea2d333 in ~QIconPrivate (this=<value optimized out>, __in_chrg=<value optimized out>) at image/qicon_p.h:78
#11 QIcon::~QIcon (this=<value optimized out>, __in_chrg=<value optimized out>) at image/qicon.cpp:600
#12 0x00007fb58e97753a in QActionPrivate::~QActionPrivate (this=0x2b572f0, __in_chrg=<value optimized out>) at kernel/qaction.cpp:101
#13 0x00007fb58f5efc61 in cleanup (this=<value optimized out>, __in_chrg=<value optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:62
#14 ~QScopedPointer (this=<value optimized out>, __in_chrg=<value optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:100
#15 QObject::~QObject (this=<value optimized out>, __in_chrg=<value optimized out>) at kernel/qobject.cpp:992
#16 0x00007fb58e9747bb in QAction::~QAction (this=0x2b572d0, __in_chrg=<value optimized out>) at kernel/qaction.cpp:674
#17 0x00007fb58f5e8b3c in QObjectPrivate::deleteChildren (this=0x4ed4780) at kernel/qobject.cpp:1986
#18 0x00007fb58e9d732d in QWidget::~QWidget (this=0x3d9edd0, __in_chrg=<value optimized out>) at kernel/qwidget.cpp:1476
#19 0x00007fb58edb692d in QMenu::~QMenu (this=0x3d9edd0, __in_chrg=<value optimized out>) at widgets/qmenu.cpp:1414
#20 0x00007fb58f5e8b3c in QObjectPrivate::deleteChildren (this=0x4e13950) at kernel/qobject.cpp:1986
#21 0x00007fb58e9d732d in QWidget::~QWidget (this=0x4ccc070, __in_chrg=<value optimized out>) at kernel/qwidget.cpp:1476
#22 0x00007fb58edb692d in QMenu::~QMenu (this=0x4ccc070, __in_chrg=<value optimized out>) at widgets/qmenu.cpp:1414
#23 0x00007fb58f5e8b3c in QObjectPrivate::deleteChildren (this=0x1a23880) at kernel/qobject.cpp:1986
#24 0x00007fb58e9d732d in QWidget::~QWidget (this=0x1a23840, __in_chrg=<value optimized out>) at kernel/qwidget.cpp:1476
#25 0x00007fb590ff1f6b in KMenu::~KMenu (this=0x1a23840, __in_chrg=<value optimized out>) at ../../kdeui/widgets/kmenu.cpp:180
#26 0x00007fb590e42096 in KActionMenu::~KActionMenu (this=0x19223b0, __in_chrg=<value optimized out>) at ../../kdeui/actions/kactionmenu.cpp:77
#27 0x00007fb58f5e8b3c in QObjectPrivate::deleteChildren (this=0x16294f0) at kernel/qobject.cpp:1986
#28 0x00007fb58e9d732d in QWidget::~QWidget (this=0x15b43e0, __in_chrg=<value optimized out>) at kernel/qwidget.cpp:1476
#29 0x00007fb5900558a1 in KMMainWidget::~KMMainWidget (this=0x15b43e0, __in_chrg=<value optimized out>) at ../../kmail/kmmainwidget.cpp:288
#30 0x00007fb58f5e8b3c in QObjectPrivate::deleteChildren (this=0x1614330) at kernel/qobject.cpp:1986
#31 0x00007fb58e9d732d in QWidget::~QWidget (this=0x161ee00, __in_chrg=<value optimized out>) at kernel/qwidget.cpp:1476
#32 0x00007fb590fef725 in KMainWindow::~KMainWindow (this=0x161ee00, __in_chrg=<value optimized out>) at ../../kdeui/widgets/kmainwindow.cpp:476
#33 0x00007fb58fdc18fd in KMMainWin::~KMMainWin (this=0x161ee00, __in_chrg=<value optimized out>, __vtt_parm=<value optimized out>) at ../../kmail/kmmainwin.cpp:106
#34 0x00007fb58f5e9e4d in QObject::event (this=0x161ee00, e=0x163eea0) at kernel/qobject.cpp:1231
#35 0x00007fb58e9cfc8f in QWidget::event (this=0x161ee00, event=0x163eea0) at kernel/qwidget.cpp:8501
#36 0x00007fb58ed930fb in QMainWindow::event (this=0x161ee00, event=0x163eea0) at widgets/qmainwindow.cpp:1414
#37 0x00007fb59102c2e3 in KXmlGuiWindow::event (this=0x2b572b8, ev=0x0) at ../../kdeui/xmlgui/kxmlguiwindow.cpp:131
#38 0x00007fb58e97a32c in QApplicationPrivate::notify_helper (this=0x12cfb40, receiver=0x161ee00, e=0x163eea0) at kernel/qapplication.cpp:4302
#39 0x00007fb58e98080b in QApplication::notify (this=0x7fff6e85f6b0, receiver=0x161ee00, e=0x163eea0) at kernel/qapplication.cpp:4185
#40 0x00007fb590f157a6 in KApplication::notify (this=0x7fff6e85f6b0, receiver=0x161ee00, event=0x163eea0) at ../../kdeui/kernel/kapplication.cpp:302
#41 0x00007fb58f5da09c in QCoreApplication::notifyInternal (this=0x7fff6e85f6b0, receiver=0x161ee00, event=0x163eea0) at kernel/qcoreapplication.cpp:726
#42 0x00007fb58f5dd744 in sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x11a20e0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#43 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x11a20e0) at kernel/qcoreapplication.cpp:1367
#44 0x00007fb58f603b73 in sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#45 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:276
#46 0x00007fb585bb96f2 in g_main_dispatch (context=0x12d2520) at /scratch/build-area/glib2.0-2.24.2/glib/gmain.c:1960
#47 IA__g_main_context_dispatch (context=0x12d2520) at /scratch/build-area/glib2.0-2.24.2/glib/gmain.c:2513
#48 0x00007fb585bbd568 in g_main_context_iterate (context=0x12d2520, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at /scratch/build-area/glib2.0-2.24.2/glib/gmain.c:2591
#49 0x00007fb585bbd71c in IA__g_main_context_iteration (context=0x12d2520, may_block=1) at /scratch/build-area/glib2.0-2.24.2/glib/gmain.c:2654
#50 0x00007fb58f6036b3 in QEventDispatcherGlib::processEvents (this=0x11a1840, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#51 0x00007fb58ea2a19e in QGuiEventDispatcherGlib::processEvents (this=0x2b572b8, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#52 0x00007fb58f5d89c2 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#53 0x00007fb58f5d8d9c in QEventLoop::exec (this=0x7fff6e85f4e0, flags=) at kernel/qeventloop.cpp:201
#54 0x00007fb58f5dda2b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1003
#55 0x0000000000403462 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../kmail/main.cpp:156

Possible duplicates by query: bug 224277, bug 224126, bug 222083.

Reported using DrKonqi