Application: kmail (1.13.2)
KDE Platform Version: 4.4.2 (KDE 4.4.2) "release 241"
Qt Version: 4.6.2
Operating System: Linux 2.6.27.45-0.1-default x86_64
Distribution: "openSUSE 11.1 (x86_64)"

-- Information about the crash:
This is a two-step bug:

First, I tried copying a local folder to my IMAP account that contained a folder with the same name, but different emails. I wanted the two to merge. What happened was instead some error message (that I unfortunately dont remember) and worse that the folder on the IMAP account simply vanished!
I let Kmail stay running and once and a while an error about access to the now gone folder popped up.

Second, I wanted to backup the my IMAP account so that the sysadmin could perhaps restore the entire account from backup. I right click on the IMAP account, choose archive. The archieving goes along fine, untill it reaches the now gone folder. At this point an error message pops up, when I click ok, Kmail crashes (attached backtrace).

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[KCrash Handler]
#5  QMutex::lock (this=0x3ff0000000000040) at thread/qmutex.cpp:150
#6  0x00007ffd85b228d0 in QCoreApplication::postEvent (receiver=0xeb2750, event=0x1ab8570, priority=0) at kernel/qcoreapplication.cpp:1113
#7  0x00007ffd88fce222 in ?? () from /usr/lib64/libkmailprivate.so.4
#8  0x00007ffd88fcf687 in ?? () from /usr/lib64/libkmailprivate.so.4
#9  0x00007ffd85b36627 in QMetaObject::activate (sender=0x4583410, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x1) at kernel/qobject.cpp:3293
#10 0x00007ffd8984d8b2 in KJob::result (this=0x3ff0000000000040, _t1=0x4583410) at /usr/src/debug/kdelibs-4.4.2/build/kdecore/kjob.moc:194
#11 0x00007ffd898569d0 in KJob::emitResult (this=0x4583410) at /usr/src/debug/kdelibs-4.4.2/kdecore/jobs/kjob.cpp:312
#12 0x00007ffd867b75e0 in KIO::SimpleJob::slotFinished (this=0x4583410) at /usr/src/debug/kdelibs-4.4.2/kio/kio/job.cpp:486
#13 0x00007ffd867d4c27 in KIO::TransferJob::slotFinished (this=0x4583410) at /usr/src/debug/kdelibs-4.4.2/kio/kio/job.cpp:1058
#14 0x00007ffd867c54f5 in KIO::TransferJob::qt_metacall (this=0x4583410, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffe6f8d360)
    at /usr/src/debug/kdelibs-4.4.2/build/kio/jobclasses.moc:367
#15 0x00007ffd85b36627 in QMetaObject::activate (sender=0xb5fb00, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x1) at kernel/qobject.cpp:3293
#16 0x00007ffd86810951 in KIO::SlaveInterface::dispatch (this=0xb5fb00, _cmd=104, rawdata=<value optimized out>) at /usr/src/debug/kdelibs-4.4.2/kio/kio/slaveinterface.cpp:175
#17 0x00007ffd86707de2 in KIO::SlaveInterface::dispatch (this=0xb5fb00) at /usr/src/debug/kdelibs-4.4.2/kio/kio/slaveinterface.cpp:91
#18 0x00007ffd8674ae47 in KIO::Slave::gotInput (this=0xb5fb00) at /usr/src/debug/kdelibs-4.4.2/kio/kio/slave.cpp:324
#19 0x00007ffd8674b9a8 in KIO::Slave::qt_metacall (this=0xb5fb00, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0x7fffe6f8d710) at /usr/src/debug/kdelibs-4.4.2/build/kio/slave.moc:82
#20 0x00007ffd85b36627 in QMetaObject::activate (sender=0x78ebe0, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x1) at kernel/qobject.cpp:3293
#21 0x00007ffd86709ca1 in KIO::ConnectionPrivate::dequeue (this=0xb5f860) at /usr/src/debug/kdelibs-4.4.2/kio/kio/connection.cpp:82
#22 0x00007ffd86709d4a in KIO::Connection::qt_metacall (this=0x78ebe0, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0x1b789f0) at /usr/src/debug/kdelibs-4.4.2/build/kio/connection.moc:79
#23 0x00007ffd85b332b8 in QObject::event (this=0x78ebe0, e=0x3682010) at kernel/qobject.cpp:1248
#24 0x00007ffd84a4368d in QApplicationPrivate::notify_helper (this=0x6512c0, receiver=0x78ebe0, e=0x3682010) at kernel/qapplication.cpp:4300
#25 0x00007ffd84a4ad94 in QApplication::notify (this=0x7fffe6f8e3f0, receiver=0x78ebe0, e=0x3682010) at kernel/qapplication.cpp:3704
#26 0x00007ffd89df1a5b in KApplication::notify (this=0x7fffe6f8e3f0, receiver=0x78ebe0, event=0x3682010) at /usr/src/debug/kdelibs-4.4.2/kdeui/kernel/kapplication.cpp:302
#27 0x00007ffd85b22c2c in QCoreApplication::notifyInternal (this=0x7fffe6f8e3f0, receiver=0x78ebe0, event=0x3682010) at kernel/qcoreapplication.cpp:704
#28 0x00007ffd85b23b84 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x60ca20) at kernel/qcoreapplication.h:215
#29 0x00007ffd85b4d823 in postEventSourceDispatch (s=<value optimized out>) at kernel/qcoreapplication.h:220
#30 0x00007ffd7ad0d0fb in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#31 0x00007ffd7ad108cd in ?? () from /usr/lib64/libglib-2.0.so.0
#32 0x00007ffd7ad10a8b in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#33 0x00007ffd85b4d37c in QEventDispatcherGlib::processEvents (this=0x6124a0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#34 0x00007ffd84af642f in QGuiEventDispatcherGlib::processEvents (this=0x3ff0000000000040, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#35 0x00007ffd85b21502 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -419896864}) at kernel/qeventloop.cpp:149
#36 0x00007ffd85b218dc in QEventLoop::exec (this=0x7fffe6f8e220, flags={i = -419896784}) at kernel/qeventloop.cpp:201
#37 0x00007ffd85b23e06 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#38 0x0000000000403554 in _start ()

Possible duplicates by query: bug 225913, bug 225880, bug 225225, bug 225208, bug 225190.

Reported using DrKonqi