Application that crashed: kmail
Version of the application: 1.12.4
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.6.0
Operating System: Linux 2.6.32-gentoo-r1 x86_64

What I was doing when the application crashed:
The title pretty much says it all. Seems to be a disconnected IMAP problem.

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
The current source language is "auto; currently asm".
[KCrash Handler]
#5  QList<QString>::operator= (this=0xa98230, folder=0x0, recurse=<value optimized out>) at /usr/include/qt4/QtCore/qlist.h:410
#6  operator= (this=0xa98230, folder=0x0, recurse=<value optimized out>) at /usr/include/qt4/QtCore/qstringlist.h:67
#7  KMFolderCachedImap::setNamespacesToList (this=0xa98230, folder=0x0, recurse=<value optimized out>) at /var/tmp/portage/kde-base/kmail-4.3.4/work/kmail-4.3.4/kmail/kmfoldercachedimap.h:380
#8  KMAcctCachedImap::processNewMail (this=0xa98230, folder=0x0, recurse=<value optimized out>) at /var/tmp/portage/kde-base/kmail-4.3.4/work/kmail-4.3.4/kmail/kmacctcachedimap.cpp:246
#9  0x00007f03503698bf in KMail::AccountManager::processNextCheck (this=0xc4e490, _newMail=<value optimized out>)
    at /var/tmp/portage/kde-base/kmail-4.3.4/work/kmail-4.3.4/kmail/accountmanager.cpp:230
#10 0x00007f035036a21a in KMail::AccountManager::singleCheckMail (this=0xc4e490, account=0xa98230, interactive=<value optimized out>)
    at /var/tmp/portage/kde-base/kmail-4.3.4/work/kmail-4.3.4/kmail/accountmanager.cpp:157
#11 0x00007f03502e32c1 in KMAccount::qt_metacall (this=0xa98230, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffaeb4c000)
    at /var/tmp/portage/kde-base/kmail-4.3.4/work/kmail-4.3.4_build/kmail/kmaccount.moc:159
#12 0x00007f03503da140 in KMail::ImapAccountBase::qt_metacall (this=0x7f034e919e60, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x0)
    at /var/tmp/portage/kde-base/kmail-4.3.4/work/kmail-4.3.4_build/kmail/imapaccountbase.moc:119
#13 0x00007f03503e29b0 in KMAcctCachedImap::qt_metacall (this=0x7f034e919e60, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x0)
    at /var/tmp/portage/kde-base/kmail-4.3.4/work/kmail-4.3.4_build/kmail/kmacctcachedimap.moc:84
#14 0x00007f034fb12913 in QMetaObject::activate (sender=0xc905c0, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3286
#15 0x00007f034fb0f5b3 in QObject::event (this=0xc905c0, e=0x0) at kernel/qobject.cpp:1216
#16 0x00007f034efe623c in QApplicationPrivate::notify_helper (this=0x8739e0, receiver=0xc905c0, e=0x7fffaeb4c750) at kernel/qapplication.cpp:4242
#17 0x00007f034efeea6a in QApplication::notify (this=0x7fffaeb4dad0, receiver=<value optimized out>, e=0x7fffaeb4c750) at kernel/qapplication.cpp:4125
#18 0x00007f03511ba476 in KApplication::notify (this=0x7fffaeb4dad0, receiver=0xc905c0, event=0x7fffaeb4c750)
    at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4/kdeui/kernel/kapplication.cpp:302
#19 0x00007f034faffccb in QCoreApplication::notifyInternal (this=0x7fffaeb4dad0, receiver=0xc905c0, event=0x7fffaeb4c750) at kernel/qcoreapplication.cpp:704
#20 0x00007f034fb2c642 in QCoreApplication::sendEvent (this=0x877220) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#21 QTimerInfoList::activateTimers (this=0x877220) at kernel/qeventdispatcher_unix.cpp:603
#22 0x00007f034fb29448 in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#23 idleTimerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#24 0x00007f0346b5ee4d in g_main_dispatch (context=0x876120) at gmain.c:1960
#25 IA__g_main_context_dispatch (context=0x876120) at gmain.c:2513
#26 0x00007f0346b62808 in g_main_context_iterate (context=0x876120, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at gmain.c:2591
#27 0x00007f0346b62930 in IA__g_main_context_iteration (context=0x876120, may_block=1) at gmain.c:2654
#28 0x00007f034fb29113 in QEventDispatcherGlib::processEvents (this=0x86eb80, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:407
#29 0x00007f034f08251e in QGuiEventDispatcherGlib::processEvents (this=0x7f034e919e60, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#30 0x00007f034fafe622 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#31 0x00007f034fafe9f4 in QEventLoop::exec (this=0x7fffaeb4cb10, flags=) at kernel/qeventloop.cpp:201
#32 0x00007f0351244f3f in KWallet::Wallet::openWallet (name=<value optimized out>, w=<value optimized out>, ot=KWallet::Wallet::Synchronous)
    at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4/kdeui/util/kwallet.cpp:252
#33 0x00007f0350440674 in KMKernel::wallet (this=0x7fffaeb4d980) at /var/tmp/portage/kde-base/kmail-4.3.4/work/kmail-4.3.4/kmail/kmkernel.cpp:2326
#34 0x00007f03503c7ef3 in KMail::NetworkAccount::readPassword (this=0xa98230) at /var/tmp/portage/kde-base/kmail-4.3.4/work/kmail-4.3.4/kmail/networkaccount.cpp:328
#35 0x00007f03503c86ae in KMail::NetworkAccount::readConfig (this=0xa98230, config=...) at /var/tmp/portage/kde-base/kmail-4.3.4/work/kmail-4.3.4/kmail/networkaccount.cpp:170
#36 0x00007f03503d5676 in KMail::ImapAccountBase::readConfig (this=0x7f034e919e60, config=...) at /var/tmp/portage/kde-base/kmail-4.3.4/work/kmail-4.3.4/kmail/imapaccountbase.cpp:204
#37 0x00007f03503e330c in KMAcctCachedImap::readConfig (this=0x7f034e919e60, config=...) at /var/tmp/portage/kde-base/kmail-4.3.4/work/kmail-4.3.4/kmail/kmacctcachedimap.cpp:319
#38 0x00007f035036b37a in KMail::AccountManager::readConfig (this=<value optimized out>) at /var/tmp/portage/kde-base/kmail-4.3.4/work/kmail-4.3.4/kmail/accountmanager.cpp:131
#39 0x00007f0350452379 in KMKernel::init (this=0x7fffaeb4d980) at /var/tmp/portage/kde-base/kmail-4.3.4/work/kmail-4.3.4/kmail/kmkernel.cpp:1475
#40 0x0000000000403131 in main (argc=<value optimized out>, argv=<value optimized out>) at /var/tmp/portage/kde-base/kmail-4.3.4/work/kmail-4.3.4/kmail/main.cpp:128

Reported using DrKonqi