I can reproduce this bug.
The only way to get rid of the crashes of the IMAP resource, is removing it completely from Akonadi and creating a new one again.

It happens always after moving a message in KMail2.

Probably helpful information: The message is moved within folders of the same resource, not from the IMAP resource to another one.

Created attachment 55566 [details]
New crash information added by DrKonqi

akonadi_imap_resource (0.1) on KDE Platform 4.5.90 (4.6 RC1) using Qt 4.7.0

- What I was doing when the application crashed:

Moving a message from the inbox to a subfolder of the same imap resource

-- Backtrace (Reduced):
#6  0x00007f6d5f1f0b16 in QByteArray (this=0x1bd8200, response=...) at /usr/include/qt4/QtCore/qbytearray.h:421
#7  toString (this=0x1bd8200, response=...) at ../../kimap/message_p.h:42
#8  KIMAP::CopyJob::handleResponse (this=0x1bd8200, response=...) at ../../kimap/copyjob.cpp:127
#9  0x00007f6d5f1e7255 in KIMAP::SessionPrivate::responseReceived (this=0x1abf150, response=...) at ../../kimap/session.cpp:263
#10 0x00007f6d5f1e7fe2 in KIMAP::Session::qt_metacall (this=0x1a8caf0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x1e57250) at ./session.moc:106

Created attachment 58354 [details]
New crash information added by DrKonqi

akonadi_imap_resource (0.1) on KDE Platform 4.6.1 (4.6.1) using Qt 4.7.0

- What I was doing when the application crashed:
 Deleting a message into the trash folder on my imap server

-- Backtrace (Reduced):
#6  0x00007f025d1c8b16 in QByteArray (this=0x2205980, response=...) at /usr/include/qt4/QtCore/qbytearray.h:421
#7  toString (this=0x2205980, response=...) at ../../kimap/message_p.h:42
#8  KIMAP::CopyJob::handleResponse (this=0x2205980, response=...) at ../../kimap/copyjob.cpp:127
#9  0x00007f025d1bf255 in KIMAP::SessionPrivate::responseReceived (this=0x206b370, response=...) at ../../kimap/session.cpp:263
#10 0x00007f025d1bffe2 in KIMAP::Session::qt_metacall (this=0x206b230, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7f02440c8b30) at ./session.moc:106

Valgrinding done by eliasp:

==17404== Invalid read of size 8
==17404==    at 0x68E4F26: KIMAP::CopyJob::handleResponse(KIMAP::Message const&) (qbytearray.h:421)
==17404==    by 0x68DC4D7: KIMAP::SessionPrivate::responseReceived(KIMAP::Message const&) (session.cpp:271)
==17404==    by 0x68DD260: KIMAP::Session::qt_metacall(QMetaObject::Call, int, void**) (session.moc:113)
==17404==    by 0x5623D19: QObject::event(QEvent*) (qobject.cpp:1211)
==17404==    by 0x5B04744: QApplicationPrivate::notify_helper(QObject*, QEvent*) (qapplication.cpp:4445)
==17404==    by 0x5B092E1: QApplication::notify(QObject*, QEvent*) (qapplication.cpp:4324)
==17404==    by 0x809721B: KApplication::notify(QObject*, QEvent*) (kapplication.cpp:311)
==17404==    by 0x56139FD: QCoreApplication::notifyInternal(QObject*, QEvent*) (qcoreapplication.cpp:732)
==17404==    by 0x56165C3: QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (qcoreapplication.h:215)
==17404==    by 0x563BE3D: postEventSourceDispatch(_GSource*, int (*)(void*), void*) (qcoreapplication.h:220)
==17404==    by 0xA150CD9: g_main_context_dispatch (gmain.c:2149)
==17404==    by 0xA1543A0: g_main_context_iterate (gmain.c:2780)
==17404==  Address 0x17c00220 is 8 bytes after a block of size 40 alloc'd
==17404==    at 0x4C2622A: malloc (vg_replace_malloc.c:236)
==17404==    by 0x55518E8: QListData::detach_grow(int*, int) (qlist.cpp:85)
==17404==    by 0x68E0508: QList<KIMAP::Message::Part>::append(KIMAP::Message::Part const&) (qlist.h:664)
==17404==    by 0x68DEF1D: KIMAP::SessionThread::readMessage() (qlist.h:321)
==17404==    by 0x68DF519: KIMAP::SessionThread::qt_metacall(QMetaObject::Call, int, void**) (sessionthread_p.moc:99)
==17404==    by 0x5623D19: QObject::event(QEvent*) (qobject.cpp:1211)
==17404==    by 0x5B04744: QApplicationPrivate::notify_helper(QObject*, QEvent*) (qapplication.cpp:4445)
==17404==    by 0x5B092E1: QApplication::notify(QObject*, QEvent*) (qapplication.cpp:4324)
==17404==    by 0x809721B: KApplication::notify(QObject*, QEvent*) (kapplication.cpp:311)
==17404==    by 0x56139FD: QCoreApplication::notifyInternal(QObject*, QEvent*) (qcoreapplication.cpp:732)
==17404==    by 0x56165C3: QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (qcoreapplication.h:215)
==17404==    by 0x563BE3D: postEventSourceDispatch(_GSource*, int (*)(void*), void*) (qcoreapplication.h:220)

sergio provided this patch on #akonadi:

diff --git a/kimap/copyjob.cpp b/kimap/copyjob.cpp
index f13ce74..de41458 100644
--- a/kimap/copyjob.cpp
+++ b/kimap/copyjob.cpp
@@ -123,7 +123,7 @@ void CopyJob::handleResponse( const Message &response )
         it != response.responseCode.end(); ++it ) {
     if ( it->toString()=="COPYUID" ) {
       it = it + 3;
-      if ( it != response.responseCode.end() ) {
+      if ( it < response.responseCode.end() ) {
         d->resultingUids = ImapSet::fromImapSequenceSet( it->toString() );
       }
       break;

This patch fixes the issue for me - please review and commit it.

Git commit 4ece14886807bc61a78f82b2919d7d8857e61e53 by Sergio Martins.
Committed on 08/04/2011 at 01:57.
Pushed by smartins into branch 'master'.

Don't segfault.

No unittest because i can't reproduce the crash with my imap server, but kevin acked the patch.

BUG: 247456

M  +1    -1    kimap/copyjob.cpp     

http://commits.kde.org/kdepimlibs/4ece14886807bc61a78f82b2919d7d8857e61e53

Git commit 078ad4b1980c2ff72816600ee3defff8f3b88de6 by Sergio Martins.
Committed on 08/04/2011 at 01:57.
Pushed by smartins into branch '4.6'.

Don't segfault.

No unittest because i can't reproduce the crash with my imap server, but kevin acked the patch.

BUG: 247456
(cherry picked from commit 4ece14886807bc61a78f82b2919d7d8857e61e53)

M  +1    -1    kimap/copyjob.cpp     

http://commits.kde.org/kdepimlibs/078ad4b1980c2ff72816600ee3defff8f3b88de6