Application that crashed: kontact
Version of the application: 4.3.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-14-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
When logging in with an instance of Kontact in the saved session, another one tries to start, generating a warning. Clicking "Start Kontact" on the warning opens two instances. Closing one of these instances causes both to crash.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
The current source language is "auto; currently c".
[KCrash Handler]
#5  0x00007ff3f8afc3aa in KMFolderImap::slotListResult (this=0x1361d40, subfolderNames=..., subfolderPaths=<value optimized out>, subfolderMimeTypes=<value optimized out>, 
    subfolderAttributes=<value optimized out>, jobData=...) at ../../kmail/kmfolderimap.cpp:793
#6  0x00007ff3f8afdb55 in KMFolderImap::qt_metacall (this=0x1361d40, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7ffff0d4ba50) at ./kmfolderimap.moc:176
#7  0x00007ff40e058ddc in QMetaObject::activate (sender=0x1ca1920, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x1ca1998) at kernel/qobject.cpp:3113
#8  0x00007ff3f89deab4 in KMail::ListJob::receivedFolders (this=0x1ca1920, _t1=<value optimized out>, _t2=<value optimized out>, _t3=..., _t4=..., _t5=...) at ./listjob.moc:91
#9  0x00007ff3f89df9fb in KMail::ListJob::slotListResult (this=<value optimized out>, job=0x1ee1c80) at ../../kmail/listjob.cpp:181
#10 0x00007ff3f89e0c53 in KMail::ListJob::qt_metacall (this=0x1ca1920, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7ffff0d4bce0) at ./listjob.moc:77
#11 0x00007ff40e058ddc in QMetaObject::activate (sender=0x1ee1c80, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x1ca1998) at kernel/qobject.cpp:3113
#12 0x00007ff40e42eaf2 in KJob::result (this=0x1361d40, _t1=0x1ee1c80) at ./kjob.moc:188
#13 0x00007ff40e42ee6f in KJob::emitResult (this=0x1ee1c80) at ../../kdecore/jobs/kjob.cpp:304
#14 0x00007ff40c4b7d93 in KIO::SimpleJob::slotFinished (this=0x1ee1c80) at ../../kio/kio/job.cpp:477
#15 0x00007ff40c4b7ed0 in KIO::ListJob::slotFinished (this=0x1ee1c80) at ../../kio/kio/job.cpp:2408
#16 0x00007ff40c4bf9d9 in KIO::ListJob::qt_metacall (this=0x1ee1c80, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7ffff0d4c010) at ./jobclasses.moc:764
#17 0x00007ff40e058ddc in QMetaObject::activate (sender=0x1c95a40, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x1ca1998) at kernel/qobject.cpp:3113
#18 0x00007ff40c578a81 in KIO::SlaveInterface::dispatch (this=0x1c95a40, _cmd=104, rawdata=...) at ../../kio/kio/slaveinterface.cpp:175
#19 0x00007ff40c575333 in KIO::SlaveInterface::dispatch (this=0x1c95a40) at ../../kio/kio/slaveinterface.cpp:91
#20 0x00007ff40c56814d in KIO::Slave::gotInput (this=0x1c95a40) at ../../kio/kio/slave.cpp:322
#21 0x00007ff40c56a26c in KIO::Slave::qt_metacall (this=0x1c95a40, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7ffff0d4c3d0) at ./slave.moc:76
#22 0x00007ff40e058ddc in QMetaObject::activate (sender=0x19a5bb0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x1ca1998) at kernel/qobject.cpp:3113
#23 0x00007ff40c484f57 in KIO::ConnectionPrivate::dequeue (this=0x1c5ac80) at ../../kio/kio/connection.cpp:82
#24 0x00007ff40c48507d in KIO::Connection::qt_metacall (this=0x19a5bb0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x1fbc460) at ./connection.moc:73
#25 0x00007ff40e0530f9 in QObject::event (this=0x19a5bb0, e=0x1beaa90) at kernel/qobject.cpp:1111
#26 0x00007ff40e963efc in QApplicationPrivate::notify_helper (this=0xc6fb50, receiver=0x19a5bb0, e=0x1beaa90) at kernel/qapplication.cpp:4056
#27 0x00007ff40e96b1ce in QApplication::notify (this=0x7ffff0d4cd90, receiver=0x19a5bb0, e=0x1beaa90) at kernel/qapplication.cpp:4021
#28 0x00007ff40f59aab6 in KApplication::notify (this=0x7ffff0d4cd90, receiver=0x19a5bb0, event=0x1beaa90) at ../../kdeui/kernel/kapplication.cpp:302
#29 0x00007ff40e043c2c in QCoreApplication::notifyInternal (this=0x7ffff0d4cd90, receiver=0x19a5bb0, event=0x1beaa90) at kernel/qcoreapplication.cpp:610
#30 0x00007ff40e04480a in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0xc40080) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#31 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0xc40080) at kernel/qcoreapplication.cpp:1247
#32 0x00007ff40e06c533 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#33 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:210
#34 0x00007ff4078bdbbe in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#35 0x00007ff4078c1588 in ?? () from /lib/libglib-2.0.so.0
#36 0x00007ff4078c16b0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#37 0x00007ff40e06c1a6 in QEventDispatcherGlib::processEvents (this=0xc3fcb0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#38 0x00007ff40e9f84be in QGuiEventDispatcherGlib::processEvents (this=0x1361d40, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#39 0x00007ff40e042532 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#40 0x00007ff40e042904 in QEventLoop::exec (this=0x7ffff0d4ccd0, flags=) at kernel/qeventloop.cpp:201
#41 0x00007ff40e044ab9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#42 0x0000000000403f47 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../../kontact/src/main.cpp:218

This bug may be a duplicate of or related to bug 213217

Reported using DrKonqi