Version:            (using Devel)
Installed from:    Compiled sources

Hello,

Kmail is pointed to the lmap server of my university. I do not know what server is running there, but if this information becomes interesting I sure can get it. There have been 1750 Mails is this folder.  This Imap account has a few folders:
account
|- INBOX
|- INBOX.Drafts
|- INBOX.Sent
|- INBOX.Trash
|- fdm
|- privat
|- temp

I do not remember in full detail what i did, but the main actions were:
- I performed a search in the folder fdm (search in the whole message).
- Right after this first search I searched in the same folder for another keyword without closing the the search dialog in between. Kmail responded by crashing.
- I restarted Kmail and tried to open the folder fdm, but every time I click on the icon of this folder Kmail crashe (see backtrace below).

Then I checked this folder with an webclient and, tada, it turns out that all messages stored in this folder are now gone. I have found a copy of all messages under
~/.kde4/share/apps/kmail/imap/,
but I do not know if attachments as well are backed up.

Additional info:
All other folders do work as normal. I also can send and receive messages.
I also can crash Kmail by right clicking on the folder. Since diff finds differences in the two backtraces I also appended the one for the right-click-crash.


Backtrace start (left click on the icon -> open the folder):
_____________________________________________________
Application: KMail (kmail), signal SIGSEGV
[Current thread is 0 (LWP 4314)]

Thread 2 (Thread 0xb0e4fb90 (LWP 4316)):
#0  0xb7f30424 in __kernel_vsyscall ()
#1  0xb55d2352 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i686/cmov/libpthread.so.0
#2  0xb63dd854 in pthread_cond_timedwait () from /lib/i686/cmov/libc.so.6
#3  0xb6e9c51c in QWaitCondition::wait (this=0x9f46548, mutex=0x9f46544, time=30000) at thread/qwaitcondition_unix.cpp:80
#4  0xb6e917c6 in QThreadPoolThread::run (this=0x9f845c0) at concurrent/qthreadpool.cpp:135
#5  0xb6e9b52e in QThreadPrivate::start (arg=0x9f845c0) at thread/qthread_unix.cpp:185
#6  0xb55ce4c0 in start_thread () from /lib/i686/cmov/libpthread.so.0
#7  0xb63cf6de in clone () from /lib/i686/cmov/libc.so.6

Thread 1 (Thread 0xb3fbe6c0 (LWP 4314)):
[KCrash Handler]
#6  0xb7418cfe in KMFolderImap::slotListFolderResult (this=0x9c02428, job=0x9fc8648) at ../../kmail/kmfolderimap.cpp:1355
#7  0xb741b38c in KMFolderImap::qt_metacall (this=0x9c02428, _c=QMetaObject::InvokeMetaMethod, _id=27, _a=0xbfb48eac) at ./kmfolderimap.moc:181
#8  0xb6f9fbe0 in QMetaObject::activate (sender=0x9fc8648, from_signal_index=7, to_signal_index=7, argv=0xbfb48eac) at kernel/qobject.cpp:3031
#9  0xb6fa0962 in QMetaObject::activate (sender=0x9fc8648, m=0xb7b854a8, local_signal_index=3, argv=0xbfb48eac) at kernel/qobject.cpp:3101
#10 0xb7a2a973 in KJob::result (this=0x9fc8648, _t1=0x9fc8648) at ./kjob.moc:186
#11 0xb7a2ae89 in KJob::emitResult (this=0x9fc8648) at ../../kdecore/jobs/kjob.cpp:294
#12 0xb5078dd5 in KIO::SimpleJob::slotFinished (this=0x9fc8648) at ../../kio/kio/job.cpp:489
#13 0xb5078f1e in KIO::ListJob::slotFinished (this=0x9fc8648) at ../../kio/kio/job.cpp:2416
#14 0xb507ad03 in KIO::ListJob::qt_metacall (this=0x9fc8648, _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0xbfb49098) at ./jobclasses.moc:747
#15 0xb6f9fbe0 in QMetaObject::activate (sender=0x9f38fa0, from_signal_index=8, to_signal_index=8, argv=0x0) at kernel/qobject.cpp:3031
#16 0xb6fa0962 in QMetaObject::activate (sender=0x9f38fa0, m=0xb5235a64, local_signal_index=4, argv=0x0) at kernel/qobject.cpp:3101
#17 0xb5144e77 in KIO::SlaveInterface::finished (this=0x9f38fa0) at ./slaveinterface.moc:163
#18 0xb5148c47 in KIO::SlaveInterface::dispatch (this=0x9f38fa0, _cmd=104, rawdata=@0xbfb49264) at ../../kio/kio/slaveinterface.cpp:175
#19 0xb5145357 in KIO::SlaveInterface::dispatch (this=0x9f38fa0) at ../../kio/kio/slaveinterface.cpp:91
#20 0xb513675d in KIO::Slave::gotInput (this=0x9f38fa0) at ../../kio/kio/slave.cpp:322
#21 0xb51378d3 in KIO::Slave::qt_metacall (this=0x9f38fa0, _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0xbfb49378) at ./slave.moc:75
#22 0xb6f9fbe0 in QMetaObject::activate (sender=0x9f46f28, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3031
#23 0xb6fa0962 in QMetaObject::activate (sender=0x9f46f28, m=0xb5232540, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3101
#24 0xb503f757 in KIO::Connection::readyRead (this=0x9f46f28) at ./connection.moc:84
#25 0xb5041819 in KIO::ConnectionPrivate::dequeue (this=0x9f46c68) at ../../kio/kio/connection.cpp:82
#26 0xb50419a6 in KIO::Connection::qt_metacall (this=0x9f46f28, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x9ffbc80) at ./connection.moc:72
#27 0xb6f98d7b in QMetaCallEvent::placeMetaCall (this=0xa1917e0, object=0x9f46f28) at kernel/qobject.cpp:529
#28 0xb6f9a8f1 in QObject::event (this=0x9f46f28, e=0xa1917e0) at kernel/qobject.cpp:1155
#29 0xb668079c in QApplicationPrivate::notify_helper (this=0x9a810f0, receiver=0x9f46f28, e=0xa1917e0) at kernel/qapplication.cpp:3803
#30 0xb668861e in QApplication::notify (this=0xbfb49bc8, receiver=0x9f46f28, e=0xa1917e0) at kernel/qapplication.cpp:3393
#31 0xb7d607fd in KApplication::notify (this=0xbfb49bc8, receiver=0x9f46f28, event=0xa1917e0) at ../../kdeui/kernel/kapplication.cpp:307
#32 0xb6f8b0e1 in QCoreApplication::notifyInternal (this=0xbfb49bc8, receiver=0x9f46f28, event=0xa1917e0) at kernel/qcoreapplication.cpp:587
#33 0xb6f8bd65 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x9a5e670) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:209
#34 0xb6f8bf5d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1091
#35 0xb6fb599f in postEventSourceDispatch (s=0x9a83520) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:214
#36 0xb488e1b8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#37 0xb4891853 in ?? () from /usr/lib/libglib-2.0.so.0
#38 0x09a83498 in ?? ()
#39 0x00000000 in ?? ()
_____________________________________________________
Backtrace end.

Backtrace start (right click on the icon):
_____________________________________________________
Application: KMail (kmail), signal SIGSEGV

Thread 1 (Thread 0xb40026c0 (LWP 4422)):
[KCrash Handler]
#6  0xb745ccfe in KMFolderImap::slotListFolderResult (this=0x845e948, job=0x895efa8) at ../../kmail/kmfolderimap.cpp:1355
#7  0xb745f38c in KMFolderImap::qt_metacall (this=0x845e948, _c=QMetaObject::InvokeMetaMethod, _id=27, _a=0xbf88dafc) at ./kmfolderimap.moc:181
#8  0xb6fe3be0 in QMetaObject::activate (sender=0x895efa8, from_signal_index=7, to_signal_index=7, argv=0xbf88dafc) at kernel/qobject.cpp:3031
#9  0xb6fe4962 in QMetaObject::activate (sender=0x895efa8, m=0xb7bc94a8, local_signal_index=3, argv=0xbf88dafc) at kernel/qobject.cpp:3101
#10 0xb7a6e973 in KJob::result (this=0x895efa8, _t1=0x895efa8) at ./kjob.moc:186
#11 0xb7a6ee89 in KJob::emitResult (this=0x895efa8) at ../../kdecore/jobs/kjob.cpp:294
#12 0xb50bcdd5 in KIO::SimpleJob::slotFinished (this=0x895efa8) at ../../kio/kio/job.cpp:489
#13 0xb50bcf1e in KIO::ListJob::slotFinished (this=0x895efa8) at ../../kio/kio/job.cpp:2416
#14 0xb50bed03 in KIO::ListJob::qt_metacall (this=0x895efa8, _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0xbf88dce8) at ./jobclasses.moc:747
#15 0xb6fe3be0 in QMetaObject::activate (sender=0x8790678, from_signal_index=8, to_signal_index=8, argv=0x0) at kernel/qobject.cpp:3031
#16 0xb6fe4962 in QMetaObject::activate (sender=0x8790678, m=0xb5279a64, local_signal_index=4, argv=0x0) at kernel/qobject.cpp:3101
#17 0xb5188e77 in KIO::SlaveInterface::finished (this=0x8790678) at ./slaveinterface.moc:163
#18 0xb518cc47 in KIO::SlaveInterface::dispatch (this=0x8790678, _cmd=104, rawdata=@0xbf88deb4) at ../../kio/kio/slaveinterface.cpp:175
#19 0xb5189357 in KIO::SlaveInterface::dispatch (this=0x8790678) at ../../kio/kio/slaveinterface.cpp:91
#20 0xb517a75d in KIO::Slave::gotInput (this=0x8790678) at ../../kio/kio/slave.cpp:322
#21 0xb517b8d3 in KIO::Slave::qt_metacall (this=0x8790678, _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0xbf88dfc8) at ./slave.moc:75
#22 0xb6fe3be0 in QMetaObject::activate (sender=0x879e590, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3031
#23 0xb6fe4962 in QMetaObject::activate (sender=0x879e590, m=0xb5276540, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3101
#24 0xb5083757 in KIO::Connection::readyRead (this=0x879e590) at ./connection.moc:84
#25 0xb5085819 in KIO::ConnectionPrivate::dequeue (this=0x879e3a8) at ../../kio/kio/connection.cpp:82
#26 0xb50859a6 in KIO::Connection::qt_metacall (this=0x879e590, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x89ab938) at ./connection.moc:72
#27 0xb6fdcd7b in QMetaCallEvent::placeMetaCall (this=0x896f8e0, object=0x879e590) at kernel/qobject.cpp:529
#28 0xb6fde8f1 in QObject::event (this=0x879e590, e=0x896f8e0) at kernel/qobject.cpp:1155
#29 0xb66c479c in QApplicationPrivate::notify_helper (this=0x8312148, receiver=0x879e590, e=0x896f8e0) at kernel/qapplication.cpp:3803
#30 0xb66cc61e in QApplication::notify (this=0xbf88f908, receiver=0x879e590, e=0x896f8e0) at kernel/qapplication.cpp:3393
#31 0xb7da47fd in KApplication::notify (this=0xbf88f908, receiver=0x879e590, event=0x896f8e0) at ../../kdeui/kernel/kapplication.cpp:307
#32 0xb6fcf0e1 in QCoreApplication::notifyInternal (this=0xbf88f908, receiver=0x879e590, event=0x896f8e0) at kernel/qcoreapplication.cpp:587
#33 0xb6fcfd65 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x82ef670) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:209
#34 0xb6fcff5d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1091
#35 0xb6ff999f in postEventSourceDispatch (s=0x8314520) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:214
#36 0xb48d21b8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#37 0xb48d5853 in ?? () from /usr/lib/libglib-2.0.so.0
#38 0x08314498 in ?? ()
#39 0x00000000 in ?? ()
_____________________________________________________
Backtrace end.