Application that crashed: kmail
Version of the application: 1.12.1
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.30-gentoo-r7 x86_64

What I was doing when the application crashed:
kmail crash when it closed

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[KCrash Handler]
#5  0x00007ff4582ef740 in QListData::shared_null () from /usr/lib64/qt4/libQtCore.so.4
#6  0x00007ff45891a5d6 in qDeleteAll<QList<KIO::Slave*>::const_iterator> (begin=) at /usr/include/qt4/QtCore/qalgorithms.h:350
#7  0x00007ff45891aeac in qDeleteAll<QList<KIO::Slave*> > (c=@0x7fff5e5918d0) at /usr/include/qt4/QtCore/qalgorithms.h:358
#8  0x00007ff45891b64c in ~ProtocolInfo (this=0x10c6690) at /var/tmp/portage/kde-base/kdelibs-4.3.1-r1/work/kdelibs-4.3.1/kio/kio/scheduler.cpp:171
#9  0x00007ff45891b6c8 in qDeleteAll<QHash<QString, KIO::SchedulerPrivate::ProtocolInfo*>::const_iterator> (begin={i = 0x10cd820}, end={i = 0x10cd8c0}) at /usr/include/qt4/QtCore/qalgorithms.h:350
#10 0x00007ff45891b90a in ~SchedulerPrivate (this=0xa6ef80) at /var/tmp/portage/kde-base/kdelibs-4.3.1-r1/work/kdelibs-4.3.1/kio/kio/scheduler.cpp:103
#11 0x00007ff458916292 in destroy () at /var/tmp/portage/kde-base/kdelibs-4.3.1-r1/work/kdelibs-4.3.1/kio/kio/scheduler.cpp:209
#12 0x00007ff456169b35 in __run_exit_handlers (status=0, listp=0x7ff4564854a8, run_list_atexit=true) at exit.c:78
#13 0x00007ff456169b85 in exit (status=13459760) at exit.c:100
#14 0x00007ff456153a44 in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, 
    rtld_fini=<value optimized out>, stack_end=0x7fff5e591a78) at libc-start.c:252
#15 0x00000000004027b9 in _start ()

This bug may be a duplicate of or related to bug 206729

Reported using DrKonqi