Application: kontact (4.11.2)
KDE Platform Version: 4.11.2
Qt Version: 4.8.5
Operating System: Linux 3.11.6-4-desktop x86_64
Distribution: "openSUSE 13.1 (Bottle) (x86_64)"

-- Information about the crash:
- What I was doing when the application crashed:

I copied all files from a system running 4.10 to another disk, which runs 4.11.2. After that I started Kontact/KMail.

- Custom settings of the application:
I have several identities and accounts in KMail

-- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fe268384880 (LWP 2193))]

Thread 5 (Thread 0x7fe24b870700 (LWP 2194)):
#0  0x00007fe25f9970af in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fe26312cf76 in ?? () from /usr/lib64/libQtWebKit.so.4
#2  0x00007fe26312cfa9 in ?? () from /usr/lib64/libQtWebKit.so.4
#3  0x00007fe25f9930db in start_thread () from /lib64/libpthread.so.0
#4  0x00007fe2658bd90d in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7fe20af4d700 (LWP 2195)):
#0  0x00007fe25f9970af in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fe262e9f2cd in ?? () from /usr/lib64/libQtWebKit.so.4
#2  0x00007fe263154ad6 in ?? () from /usr/lib64/libQtWebKit.so.4
#3  0x00007fe25f9930db in start_thread () from /lib64/libpthread.so.0
#4  0x00007fe2658bd90d in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7fe1ff043700 (LWP 2223)):
#0  0x00007fe2658b4b3d in poll () from /lib64/libc.so.6
#1  0x00007fe25f3d05c4 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fe25f3d06cc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fe26603ad76 in QEventDispatcherGlib::processEvents (this=0xe404c0, flags=...) at kernel/qeventdispatcher_glib.cpp:427
#4  0x00007fe26600cd0f in QEventLoop::processEvents (this=this@entry=0x7fe1ff042d60, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fe26600d005 in QEventLoop::exec (this=this@entry=0x7fe1ff042d60, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fe265f0bfef in QThread::exec (this=<optimized out>) at thread/qthread.cpp:536
#7  0x00007fe265f0e68f in QThreadPrivate::start (arg=0x17109f0) at thread/qthread_unix.cpp:338
#8  0x00007fe25f9930db in start_thread () from /lib64/libpthread.so.0
#9  0x00007fe2658bd90d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7fe1fa6fe700 (LWP 2255)):
#0  0x00007fe25f9970af in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fe2025558cb in ?? () from /usr/lib64/libQtScript.so.4
#2  0x00007fe202555909 in ?? () from /usr/lib64/libQtScript.so.4
#3  0x00007fe25f9930db in start_thread () from /lib64/libpthread.so.0
#4  0x00007fe2658bd90d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7fe268384880 (LWP 2193)):
[KCrash Handler]
#5  QString::operator== (this=this@entry=0xe07f88, other=...) at tools/qstring.cpp:2192
#6  0x00007fe267b74c99 in operator!= (s=..., this=0xe07f88) at /usr/include/QtCore/qstring.h:406
#7  Kontact::MainWindow::setInitialActivePluginModule (this=0xe07ec0, module=...) at /usr/src/debug/kdepim-4.11.2/kontact/src/mainwindow.cpp:303
#8  0x000000000040429a in KontactApp::newInstance (this=0x7ffff9e0dcd0) at /usr/src/debug/kdepim-4.11.2/kontact/src/main.cpp:148
#9  0x00007fe26773c3dc in ?? () from /usr/lib64/libkdeui.so.5
#10 0x00007fe26773c465 in ?? () from /usr/lib64/libkdeui.so.5
#11 0x00007fe26773c683 in ?? () from /usr/lib64/libkdeui.so.5
#12 0x00007fe264c32ead in QDBusConnectionPrivate::deliverCall (this=this@entry=0xc86940, object=object@entry=0xca52e0, msg=..., metaTypes=..., slotIdx=4) at qdbusintegrator.cpp:951
#13 0x00007fe264c340ab in QDBusConnectionPrivate::activateCall (this=this@entry=0xc86940, object=0xca52e0, flags=flags@entry=337, msg=...) at qdbusintegrator.cpp:863
#14 0x00007fe264c34b1d in QDBusConnectionPrivate::activateObject (this=0xc86940, node=..., msg=..., pathStartPos=<optimized out>) at qdbusintegrator.cpp:1427
#15 0x00007fe264c34beb in QDBusActivateObjectEvent::placeMetaCall (this=0x282eeb0) at qdbusintegrator.cpp:1541
#16 0x00007fe26602611e in QObject::event (this=0x7ffff9e0dcd0, e=<optimized out>) at kernel/qobject.cpp:1203
#17 0x00007fe266a238a3 in QApplication::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#18 0x00007fe266a1e8ac in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#19 0x00007fe266a24e70 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#20 0x00007fe26773518a in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#21 0x00007fe26600e0ad in QCoreApplication::notifyInternal (this=0x7ffff9e0dcd0, receiver=receiver@entry=0x7ffff9e0dcd0, event=event@entry=0x282eeb0) at kernel/qcoreapplication.cpp:949
#22 0x00007fe2660110ff in sendEvent (event=0x282eeb0, receiver=0x7ffff9e0dcd0) at kernel/qcoreapplication.h:231
#23 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0xc60480) at kernel/qcoreapplication.cpp:1573
#24 0x00007fe2660115a3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1466
#25 0x00007fe26603b493 in sendPostedEvents () at kernel/qcoreapplication.h:236
#26 postEventSourceDispatch (s=0xca1c20) at kernel/qeventdispatcher_glib.cpp:280
#27 0x00007fe25f3d02d6 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#28 0x00007fe25f3d0628 in ?? () from /usr/lib64/libglib-2.0.so.0
#29 0x00007fe25f3d06cc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#30 0x00007fe26603ad55 in QEventDispatcherGlib::processEvents (this=0xc65f60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#31 0x00007fe266abb936 in ?? () from /usr/lib64/libQtGui.so.4
#32 0x00007fe26600cd0f in QEventLoop::processEvents (this=this@entry=0x7ffff9e0dbd0, flags=...) at kernel/qeventloop.cpp:149
#33 0x00007fe26600d005 in QEventLoop::exec (this=this@entry=0x7ffff9e0dbd0, flags=...) at kernel/qeventloop.cpp:204
#34 0x00007fe26601213b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1221
#35 0x0000000000403960 in main (argc=1, argv=0x7ffff9e0de18) at /usr/src/debug/kdepim-4.11.2/kontact/src/main.cpp:219

Reported using DrKonqi