Version:            (using KDE 4.2.2)
OS:                Linux
Installed from:    Debian testing/unstable Packages

KMail sometimes crashes on KDE Startup (when KMail is started by KDE).

Steps to Reproduce: None, since it does not happen always. I hope the stacktrace provides enogh information.

Anwendung: KMail (kmail), Signal SIGSEGV
0x00007f669cf288d1 in nanosleep () from /lib/libc.so.6
Current language:  auto; currently c
[Current thread is 0 (LWP 7466)]

Thread 3 (Thread 0x7f6684858950 (LWP 7584)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217
#1  0x00007f669e3a97d7 in QWaitCondition::wait (this=0x152c888, mutex=0x152c880, time=30000) at thread/qwaitcondition_unix.cpp:85
#2  0x00007f669e39f2f9 in QThreadPoolThread::run (this=0x636170) at concurrent/qthreadpool.cpp:140
#3  0x00007f669e3a8802 in QThreadPrivate::start (arg=0x636170) at thread/qthread_unix.cpp:189
#4  0x00007f6698523faa in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007f669cf582cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f6683c26950 (LWP 7585)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:217
#1  0x00007f669e3a97d7 in QWaitCondition::wait (this=0x152c888, mutex=0x152c880, time=30000) at thread/qwaitcondition_unix.cpp:85
#2  0x00007f669e39f2f9 in QThreadPoolThread::run (this=0x147e870) at concurrent/qthreadpool.cpp:140
#3  0x00007f669e3a8802 in QThreadPrivate::start (arg=0x147e870) at thread/qthread_unix.cpp:189
#4  0x00007f6698523faa in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007f669cf582cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()
Current language:  auto; currently asm

Thread 1 (Thread 0x7f669ffe7770 (LWP 7466)):
[KCrash Handler]
#5  KMFolder::unGetMsg (this=0x0, idx=-1) at ../../kmail/kmfolder.cpp:372
#6  0x00007f669ed69a56 in KMAcctImap::slotFilterMsg (this=0x9c1710, msg=0x171df60) at ../../kmail/kmacctimap.cpp:616
#7  0x00007f669ed6cf37 in KMAcctImap::qt_metacall (this=0x9c1710, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffa813f2a0) at ./kmacctimap.moc:88
#8  0x00007f669e4a6622 in QMetaObject::activate (sender=0x1726680, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x47fbf52) at kernel/qobject.cpp:3069
#9  0x00007f669eec284f in KMail::FolderJob::messageRetrieved (this=0x0, _t1=0x171df60) at ./folderjob.moc:97
#10 0x00007f669eece5d8 in KMail::ImapJob::slotGetMessageResult (this=0x1726680, job=0x17dc070) at ../../kmail/imapjob.cpp:460
#11 0x00007f669eed18d7 in KMail::ImapJob::qt_metacall (this=0x1726680, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffa813f4e0) at ./imapjob.moc:81
#12 0x00007f669e4a6622 in QMetaObject::activate (sender=0x17dc070, from_signal_index=<value optimized out>, to_signal_index=7, argv=0x47fbf52) at kernel/qobject.cpp:3069
#13 0x00007f669f599e92 in KJob::result (this=0x0, _t1=0x17dc070) at ./kjob.moc:186
#14 0x00007f669f59a20f in KJob::emitResult (this=0x17dc070) at ../../kdecore/jobs/kjob.cpp:294
#15 0x00007f6697586c10 in KIO::SimpleJob::slotFinished (this=0x17dc070) at ../../kio/kio/job.cpp:489
#16 0x00007f6697587e33 in KIO::TransferJob::slotFinished (this=0x17dc070) at ../../kio/kio/job.cpp:966
#17 0x00007f6697588eb5 in KIO::TransferJob::qt_metacall (this=0x17dc070, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffa813f8e0) at ./jobclasses.moc:336
#18 0x00007f669e4a6622 in QMetaObject::activate (sender=0x636550, from_signal_index=<value optimized out>, to_signal_index=8, argv=0x47fbf52) at kernel/qobject.cpp:3069
#19 0x00007f669763e461 in KIO::SlaveInterface::dispatch (this=0x636550, _cmd=104, rawdata=<value optimized out>) at ../../kio/kio/slaveinterface.cpp:175
#20 0x00007f669763afb2 in KIO::SlaveInterface::dispatch (this=0x636550) at ../../kio/kio/slaveinterface.cpp:91
#21 0x00007f669762c1b3 in KIO::Slave::gotInput (this=0x636550) at ../../kio/kio/slave.cpp:322
#22 0x00007f669762e4b8 in KIO::Slave::qt_metacall (this=0x636550, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x7fffa813fd00) at ./slave.moc:75
#23 0x00007f669e4a6622 in QMetaObject::activate (sender=0x14952b0, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x47fbf52) at kernel/qobject.cpp:3069
#24 0x00007f6697552821 in KIO::ConnectionPrivate::dequeue (this=0x14aabe0) at ../../kio/kio/connection.cpp:82
#25 0x00007f6697552c7a in KIO::Connection::qt_metacall (this=0x14952b0, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x1d1bb60) at ./connection.moc:72
#26 0x00007f669e4a0c78 in QObject::event (this=0x14952b0, e=0x1748a30) at kernel/qobject.cpp:1118
#27 0x00007f669d8d667d in QApplicationPrivate::notify_helper (this=0x63c9f0, receiver=0x14952b0, e=0x1748a30) at kernel/qapplication.cpp:4084
#28 0x00007f669d8de86a in QApplication::notify (this=0x7fffa8140870, receiver=0x14952b0, e=0x1748a30) at kernel/qapplication.cpp:4049
#29 0x00007f669fb3655b in KApplication::notify (this=0x7fffa8140870, receiver=0x14952b0, event=0x1748a30) at ../../kdeui/kernel/kapplication.cpp:307
#30 0x00007f669e490c4c in QCoreApplication::notifyInternal (this=0x7fffa8140870, receiver=0x14952b0, event=0x1748a30) at kernel/qcoreapplication.cpp:602
#31 0x00007f669e4918ba in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x608370) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#32 0x00007f669e4ba613 in postEventSourceDispatch (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#33 0x00007f669587ef7a in IA__g_main_context_dispatch (context=0x63e220) at /tmp/buildd/glib2.0-2.20.1/glib/gmain.c:1814
#34 0x00007f6695882640 in g_main_context_iterate (context=0x63e220, block=1, dispatch=1, self=<value optimized out>) at /tmp/buildd/glib2.0-2.20.1/glib/gmain.c:2448
#35 0x00007f66958827dc in IA__g_main_context_iteration (context=0x63e220, may_block=1) at /tmp/buildd/glib2.0-2.20.1/glib/gmain.c:2511
#36 0x00007f669e4ba29f in QEventDispatcherGlib::processEvents (this=0x61a980, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:323
#37 0x00007f669d96e74f in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#38 0x00007f669e48f4f2 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -1475082624}) at kernel/qeventloop.cpp:149
#39 0x00007f669e48f8bd in QEventLoop::exec (this=0x7fffa81406c0, flags={i = -1475082544}) at kernel/qeventloop.cpp:200
#40 0x00007f669e491b84 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#41 0x0000000000402f8b in main (argc=<value optimized out>, argv=<value optimized out>) at ../../kmail/main.cpp:146
#0  0x00007f669cf288d1 in nanosleep () from /lib/libc.so.6
Current language:  auto; currently c