Application: kmail (1.13.5)
KDE Platform Version: 4.4.5 (KDE 4.4.5)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-35-generic x86_64
Distribution: Ubuntu 10.04.3 LTS

-- Information about the crash:
Delete a message then undo action sometimes causes crash. Leaves kmail running in the background which then needs to be killed.

The crash can be reproduced some of the time.

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[KCrash Handler]
#5  0x00007f7c0c665bd0 in ?? () from /usr/lib/libkmailprivate.so.4
#6  0x00007f7c0c74ac83 in ?? () from /usr/lib/libkmailprivate.so.4
#7  0x00007f7c0c866662 in KMMainWidget::slotUndo() () from /usr/lib/libkmailprivate.so.4
#8  0x00007f7c0c869246 in KMMainWidget::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkmailprivate.so.4
#9  0x00007f7c0b148e3f in QMetaObject::activate (sender=0x1bfc510, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x1fea350) at kernel/qobject.cpp:3293
#10 0x00007f7c0b603032 in QAction::triggered (this=0x0, _t1=false) at .moc/release-shared/moc_qaction.cpp:263
#11 0x00007f7c0b6050ab in QAction::activate (this=0x1bfc510, event=<value optimized out>) at kernel/qaction.cpp:1255
#12 0x00007f7c0ba4439d in QMenuPrivate::activateCausedStack (this=<value optimized out>, causedStack=..., action=0x1bfc510, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:1011
#13 0x00007f7c0ba49dda in QMenuPrivate::activateAction (this=0x1c9fd80, action=0x1bfc510, action_e=QAction::Trigger, self=<value optimized out>) at widgets/qmenu.cpp:1103
#14 0x00007f7c0d7e948e in KMenu::mouseReleaseEvent (this=0x1c9fd40, e=0x1fea350) at ../../kdeui/widgets/kmenu.cpp:471
#15 0x00007f7c0b65f582 in QWidget::event (this=0x1c9fd40, event=0x7fffdb3ef7c0) at kernel/qwidget.cpp:7998
#16 0x00007f7c0ba4bf9b in QMenu::event (this=0x1c9fd40, e=0x7fffdb3ef7c0) at widgets/qmenu.cpp:2414
#17 0x00007f7c0b60922c in QApplicationPrivate::notify_helper (this=0x1529130, receiver=0x1c9fd40, e=0x7fffdb3ef7c0) at kernel/qapplication.cpp:4300
#18 0x00007f7c0b60fecb in QApplication::notify (this=0x7fffdb3f05e0, receiver=0x1c9fd40, e=0x7fffdb3ef7c0) at kernel/qapplication.cpp:3865
#19 0x00007f7c0d70ca16 in KApplication::notify (this=0x7fffdb3f05e0, receiver=0x1c9fd40, event=0x7fffdb3ef7c0) at ../../kdeui/kernel/kapplication.cpp:302
#20 0x00007f7c0b13606c in QCoreApplication::notifyInternal (this=0x7fffdb3f05e0, receiver=0x1c9fd40, event=0x7fffdb3ef7c0) at kernel/qcoreapplication.cpp:704
#21 0x00007f7c0b60f0ae in QCoreApplication::sendEvent (receiver=0x1c9fd40, event=0x7fffdb3ef7c0, alienWidget=0x0, nativeWidget=0x1c9fd40, buttonDown=<value optimized out>, 
    lastMouseReceiver=<value optimized out>, spontaneous=true) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#22 QApplicationPrivate::sendMouseEvent (receiver=0x1c9fd40, event=0x7fffdb3ef7c0, alienWidget=0x0, nativeWidget=0x1c9fd40, buttonDown=<value optimized out>, lastMouseReceiver=<value optimized out>, 
    spontaneous=true) at kernel/qapplication.cpp:2965
#23 0x00007f7c0b68f3dd in QETWidget::translateMouseEvent (this=0x1c9fd40, event=<value optimized out>) at kernel/qapplication_x11.cpp:4302
#24 0x00007f7c0b68d8ac in QApplication::x11ProcessEvent (this=<value optimized out>, event=0x7fffdb3f00e0) at kernel/qapplication_x11.cpp:3501
#25 0x00007f7c0b6b9882 in x11EventSourceDispatch (s=0x1471fb0, callback=<value optimized out>, user_data=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:146
#26 0x00007f7c021918c2 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#27 0x00007f7c02195748 in ?? () from /lib/libglib-2.0.so.0
#28 0x00007f7c021958fc in g_main_context_iteration () from /lib/libglib-2.0.so.0
#29 0x00007f7c0b15f513 in QEventDispatcherGlib::processEvents (this=0x1435000, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#30 0x00007f7c0b6b946e in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#31 0x00007f7c0b134992 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#32 0x00007f7c0b134d6c in QEventLoop::exec (this=0x7fffdb3f0410, flags=) at kernel/qeventloop.cpp:201
#33 0x00007f7c0b138aab in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#34 0x0000000000403482 in _start ()

Reported using DrKonqi