Version:            (using KDE 4.2.0)
OS:                Linux
Installed from:    Mandriva RPMs

Using Qt 4.5 rc1 as shipped by Mandriva.

Several POP accounts; mail is stored in local folders (no IMAP). When deleting thread using Ctrl-DEL kmail crashed. Several threads were deleted before in the same session. After restarting kmail the last thread was actually gone.

Application: KMail (kmail), signal SIGABRT
[Current thread is 1 (Thread 0xb3abb6d0 (LWP 5387))]

Thread 1 (Thread 0xb3abb6d0 (LWP 5387)):
[KCrash Handler]
#6  0xb7eee424 in __kernel_vsyscall ()
#7  0xb6267c00 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#8  0xb6269668 in abort () at abort.c:88
#9  0xb6ed4fb5 in qt_message_output (msgType=QtFatalMsg, 
    buf=0x93a8f90 "ASSERT: \"dyingMessage->isViewable()\" in file /home/mandrake/rpm/BUILD/kdepim-4.2.0/kmail/messagelistview/core/model.cpp, line 2931") at global/qglobal.cpp:2001
#10 0xb6ed50ac in qFatal (msg=0x6 <Address 0x6 out of bounds>) at global/qglobal.cpp:2196
#11 0xb6ed51a5 in qt_assert (assertion=0xb77787b7 "dyingMessage->isViewable()", file=0xb7777b8c "/home/mandrake/rpm/BUILD/kdepim-4.2.0/kmail/messagelistview/core/model.cpp", line=2931)
    at global/qglobal.cpp:1772
#12 0xb7669981 in KMail::MessageListView::Core::Model::viewItemJobStepInternalForJobPass1Cleanup (this=0x8e23130, job=0x8bafe98, tStart=@0xbfe0a184)
    at /usr/src/debug/kdepim-4.2.0/kmail/messagelistview/core/model.cpp:2931
#13 0xb766b3ce in KMail::MessageListView::Core::Model::viewItemJobStepInternalForJob (this=0x8e23130, job=0x8bafe98, tStart=@0xbfe0a184)
    at /usr/src/debug/kdepim-4.2.0/kmail/messagelistview/core/model.cpp:3311
#14 0xb766bd23 in KMail::MessageListView::Core::Model::viewItemJobStepInternal (this=0x8e23130) at /usr/src/debug/kdepim-4.2.0/kmail/messagelistview/core/model.cpp:3513
#15 0xb766c6c5 in KMail::MessageListView::Core::Model::viewItemJobStep (this=0x8e23130) at /usr/src/debug/kdepim-4.2.0/kmail/messagelistview/core/model.cpp:3672
#16 0xb72c02cc in KMail::MessageListView::Core::Model::qt_metacall (this=0x8e23130, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfe0a358) at /usr/src/debug/kdepim-4.2.0/build/kmail/moc_model.cpp:76
#17 0xb6ff0125 in QMetaObject::activate (sender=0x8e55710, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3055
#18 0xb6ff19b5 in QMetaObject::activate (sender=0x8e55710, m=0xb70d0904, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3127
#19 0xb702d045 in QTimer::timeout (this=0x8e55710) at .moc/release-shared/moc_qtimer.cpp:128
#20 0xb6ff5e36 in QTimer::timerEvent (this=0x8e55710, e=0xbfe0a7ac) at kernel/qtimer.cpp:256
#21 0xb6fea31b in QObject::event (this=0x8e55710, e=0xbfe0a7ac) at kernel/qobject.cpp:1068
#22 0xb65bea0c in QApplicationPrivate::notify_helper (this=0x8b86fb0, receiver=0x8e55710, e=0xbfe0a7ac) at kernel/qapplication.cpp:4051
#23 0xb65c7146 in QApplication::notify (this=0xbfe0aab8, receiver=0x8e55710, e=0xbfe0a7ac) at kernel/qapplication.cpp:3598
#24 0xb7ca5300 in KApplication::notify (this=0xbfe0aab8, receiver=0x8e55710, event=0xbfe0a7ac) at /usr/src/debug/kdelibs-4.2.0/kdeui/kernel/kapplication.cpp:307
#25 0xb6fd961e in QCoreApplication::notifyInternal (this=0xbfe0aab8, receiver=0x8e55710, event=0xbfe0a7ac) at kernel/qcoreapplication.cpp:597
#26 0xb7009c6d in QTimerInfoList::activateTimers (this=0x8b89d34) at kernel/qcoreapplication.h:208
#27 0xb700654e in timerSourceDispatch (source=0x8b89d00) at kernel/qeventdispatcher_glib.cpp:159
#28 0xb44b8c8a in IA__g_main_context_dispatch (context=0x8b89060) at gmain.c:1814
#29 0xb44bc2f4 in g_main_context_iterate (context=0x8b89060, block=1, dispatch=1, self=0x8bc09e8) at gmain.c:2448
#30 0xb44bc47f in IA__g_main_context_iteration (context=0x8b89060, may_block=1) at gmain.c:2511
#31 0xb70064aa in QEventDispatcherGlib::processEvents (this=0x8b7b5b0, flags={i = -1075795688}) at kernel/qeventdispatcher_glib.cpp:318
#32 0xb6662eba in QGuiEventDispatcherGlib::processEvents (this=0x8b7b5b0, flags={i = -1075795640}) at kernel/qguieventdispatcher_glib.cpp:197
#33 0xb6fd7be3 in QEventLoop::processEvents (this=0xbfe0a9c0, flags={i = -1075795576}) at kernel/qeventloop.cpp:144
#34 0xb6fd8031 in QEventLoop::exec (this=0xbfe0a9c0, flags={i = -1075795512}) at kernel/qeventloop.cpp:195
#35 0xb6fda596 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:875
#36 0xb65be874 in QApplication::exec () at kernel/qapplication.cpp:3526
#37 0x0804a6b1 in main (argc=) at /usr/src/debug/kdepim-4.2.0/kmail/main.cpp:146