Version:            (using KDE KDE 3.3.1)
Installed from:    SuSE RPMs
OS:                Linux

This bug is not completely reproducable, but occurs often enough to report it. It has been present in KMail at least since KDE 3.0:

Go to trash folder
select a message
delete all messages in folder by keeping the "del" key pressed

after last message has been deleted KMail crashes. 

I have the impression that this happens more frequently when there are large messages or messages with large attachments (which take longer to display while deleting).

Backtrace:

[New Thread 16384 (LWP 2976)]

[KCrash handler]
#4  0x00480020 in ?? ()
#5  0x49f3cbeb in KMMoveCommand::execute() ()
   from /opt/kde3/lib/libkmailprivate.so.0
#6  0x49f3474b in KMCommand::slotPostTransfer(KMCommand::Result) ()
   from /opt/kde3/lib/libkmailprivate.so.0
#7  0x49f2df17 in KMCommand::qt_invoke(int, QUObject*) ()
   from /opt/kde3/lib/libkmailprivate.so.0
#8  0x49f31ebb in KMMenuCommand::qt_invoke(int, QUObject*) ()
   from /opt/kde3/lib/libkmailprivate.so.0
#9  0x49f3231e in KMMoveCommand::qt_invoke(int, QUObject*) ()
   from /opt/kde3/lib/libkmailprivate.so.0
#10 0x49f3259b in KMDeleteMsgCommand::qt_invoke(int, QUObject*) ()
   from /opt/kde3/lib/libkmailprivate.so.0
#11 0x41fd41fb in QObject::activate_signal(QConnectionList*, QUObject*) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#12 0x49f2dd5a in KMCommand::messagesTransfered(KMCommand::Result) ()
   from /opt/kde3/lib/libkmailprivate.so.0
#13 0x49f34793 in KMCommand::transferSelectedMsgs() ()
   from /opt/kde3/lib/libkmailprivate.so.0
#14 0x49f345d4 in KMCommand::slotStart() ()
   from /opt/kde3/lib/libkmailprivate.so.0
#15 0x49f2df24 in KMCommand::qt_invoke(int, QUObject*) ()
   from /opt/kde3/lib/libkmailprivate.so.0
#16 0x49f31ebb in KMMenuCommand::qt_invoke(int, QUObject*) ()
   from /opt/kde3/lib/libkmailprivate.so.0
#17 0x49f3231e in KMMoveCommand::qt_invoke(int, QUObject*) ()
   from /opt/kde3/lib/libkmailprivate.so.0
#18 0x49f3259b in KMDeleteMsgCommand::qt_invoke(int, QUObject*) ()
   from /opt/kde3/lib/libkmailprivate.so.0
#19 0x41fd41fb in QObject::activate_signal(QConnectionList*, QUObject*) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#20 0x4231901a in QSignal::signal(QVariant const&) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#21 0x41fef10f in QSignal::activate() () from /usr/lib/qt3/lib/libqt-mt.so.3
#22 0x41ff6c33 in QSingleShotTimer::event(QEvent*) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#23 0x41f72196 in QApplication::internalNotify(QObject*, QEvent*) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#24 0x41f714be in QApplication::notify(QObject*, QEvent*) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#25 0x4116816e in KApplication::notify(QObject*, QEvent*) ()
   from /opt/kde3/lib/libkdecore.so.4
#26 0x41f5e823 in QEventLoop::activateTimers() ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#27 0x41f16e37 in QEventLoop::processEvents(unsigned) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#28 0x41f84ea0 in QEventLoop::enterLoop() ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#29 0x41f84d96 in QEventLoop::exec() () from /usr/lib/qt3/lib/libqt-mt.so.3
#30 0x41f7242f in QApplication::exec() () from /usr/lib/qt3/lib/libqt-mt.so.3
#31 0x0804a34f in ?? ()
#32 0xbfffefd0 in ?? ()
#33 0xbfffeee0 in ?? ()