Application that crashed: kmail
Version of the application: 1.12.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-17-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
My internet connection dropped and when I pressed the button of the connection error alert, kmail crashed.

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[KCrash Handler]
#6  KIO::Slave::deref (this=0xa32ed08) at ../../kio/kio/slave.cpp:242
#7  0x04573af6 in KIO::Slave::gotInput (this=0xa32ed08) at ../../kio/kio/slave.cpp:335
#8  0x04575ee3 in KIO::Slave::qt_metacall (this=0xa32ed08, _c=QMetaObject::InvokeMetaMethod, _id=30, _a=0xbfba69bc) at ./slave.moc:76
#9  0x007a4263 in QMetaObject::activate (sender=0xa3328b0, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#10 0x007a4ec2 in QMetaObject::activate (sender=0xa3328b0, m=0x46668a0, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#11 0x0447df97 in KIO::Connection::readyRead (this=0xa3328b0) at ./connection.moc:86
#12 0x0447fd5e in KIO::ConnectionPrivate::dequeue (this=0xa28d8e8) at ../../kio/kio/connection.cpp:82
#13 0x0447fe8e in KIO::Connection::qt_metacall (this=0xa3328b0, _c=QMetaObject::InvokeMetaMethod, _id=5, _a=0xa3257b8) at ./connection.moc:73
#14 0x0079cf0b in QMetaCallEvent::placeMetaCall (this=0xa15f520, object=0xa3328b0) at kernel/qobject.cpp:477
#15 0x0079e5fe in QObject::event (this=0xa3328b0, e=0xa15f520) at kernel/qobject.cpp:1111
#16 0x069b1f54 in QApplicationPrivate::notify_helper (this=0x986f548, receiver=0xa3328b0, e=0xa15f520) at kernel/qapplication.cpp:4056
#17 0x069b967c in QApplication::notify (this=0xbfba72f0, receiver=0xa3328b0, e=0xa15f520) at kernel/qapplication.cpp:3603
#18 0x00376bfa in KApplication::notify (this=0xbfba72f0, receiver=0xa3328b0, event=0xa15f520) at ../../kdeui/kernel/kapplication.cpp:302
#19 0x0078e6cb in QCoreApplication::notifyInternal (this=0xbfba72f0, receiver=0xa3328b0, event=0xa15f520) at kernel/qcoreapplication.cpp:610
#20 0x0078f2b2 in QCoreApplication::sendEvent (receiver=0x0, event_type=0, data=0x9840fa8) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#21 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x9840fa8) at kernel/qcoreapplication.cpp:1247
#22 0x0078f47d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1140
#23 0x007b93ff in QCoreApplication::sendPostedEvents (s=0x9869520) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#24 postEventSourceDispatch (s=0x9869520) at kernel/qeventdispatcher_glib.cpp:210
#25 0x04a17e88 in g_main_dispatch (context=0x98694a0) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:1960
#26 IA__g_main_context_dispatch (context=0x98694a0) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2513
#27 0x04a1b730 in g_main_context_iterate (context=0x98694a0, block=<value optimized out>, dispatch=1, self=0x986f8e0) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2591
#28 0x04a1b863 in IA__g_main_context_iteration (context=0x98694a0, may_block=1) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2654
#29 0x007b902c in QEventDispatcherGlib::processEvents (this=0x9841180, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#30 0x06a52be5 in QGuiEventDispatcherGlib::processEvents (this=0x9841180, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#31 0x0078cc79 in QEventLoop::processEvents (this=0xbfba71b4, flags=) at kernel/qeventloop.cpp:149
#32 0x0078d0ca in QEventLoop::exec (this=0xbfba71b4, flags=...) at kernel/qeventloop.cpp:201
#33 0x0078f53f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#34 0x069b1dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#35 0x0804a702 in _start ()

This bug may be a duplicate of or related to bug 213688

Reported using DrKonqi