Happened again

Application: kmail (4.14.4)
KDE Platform Version: 4.14.4
Qt Version: 4.8.6
Operating System: Linux 3.16.7-7-desktop x86_64
Distribution: "openSUSE 13.2 (Harlequin) (x86_64)"

-- Information about the crash:
Reproducible: Sometimes

Steps to Reproduce:
1.Have KMail installed
2.Wait
3.Wait more

Actual Results:  
it crashes

Expected Results:  
it should run forever

The crash can be reproduced sometimes.

-- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f97437b1800 (LWP 1471))]

Thread 4 (Thread 0x7f971d9e9700 (LWP 1746)):
#0  0x00007f973e91905f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f9733e34686 in WTF::TCMalloc_PageHeap::scavengerThread() () at /usr/lib64/libQtWebKit.so.4
#2  0x00007f9733e346b9 in  () at /usr/lib64/libQtWebKit.so.4
#3  0x00007f973e9150a4 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f9740b147fd in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f971c858700 (LWP 1808)):
#0  0x00007f973e91905f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f9733ba6e7d in JSC::BlockAllocator::blockFreeingThreadMain() () at /usr/lib64/libQtWebKit.so.4
#2  0x00007f9733e5c1e6 in WTF::wtfThreadEntryPoint(void*) () at /usr/lib64/libQtWebKit.so.4
#3  0x00007f973e9150a4 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f9740b147fd in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f96d79ce700 (LWP 1812)):
[KCrash Handler]
#5  0x00007f97365a3b3e in  () at /lib64/libdbus-1.so.3
#6  0x00007f973659cbc2 in  () at /lib64/libdbus-1.so.3
#7  0x00007f973659d0d2 in dbus_message_unref () at /lib64/libdbus-1.so.3
#8  0x00007f973eb79b09 in QDBusArgument::~QDBusArgument() () at /usr/lib64/libQtDBus.so.4
#9  0x00007f973eb5676e in  () at /usr/lib64/libQtDBus.so.4
#10 0x00007f974215d9a3 in  () at /usr/lib64/libQtCore.so.4
#11 0x00007f973eb45a5c in  () at /usr/lib64/libQtDBus.so.4
#12 0x00007f973eb59f7f in QDBusMessage::~QDBusMessage() () at /usr/lib64/libQtDBus.so.4
#13 0x00007f973eb56d56 in  () at /usr/lib64/libQtDBus.so.4
#14 0x00007f974213d586 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQtCore.so.4
#15 0x00007f97421678fe in  () at /usr/lib64/libQtCore.so.4
#16 0x00007f973865fa04 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#17 0x00007f973865fc48 in  () at /usr/lib64/libglib-2.0.so.0
#18 0x00007f973865fcec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#19 0x00007f97421670de in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQtCore.so.4
#20 0x00007f9742138e6f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQtCore.so.4
#21 0x00007f9742139165 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQtCore.so.4
#22 0x00007f97420360bf in QThread::exec() () at /usr/lib64/libQtCore.so.4
#23 0x00007f974203879f in  () at /usr/lib64/libQtCore.so.4
#24 0x00007f973e9150a4 in start_thread () at /lib64/libpthread.so.0
#25 0x00007f9740b147fd in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f97437b1800 (LWP 1471)):
#0  0x00007f9740b0849d in read () at /lib64/libc.so.6
#1  0x00007f97386a0750 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f973865f714 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f973865fb7b in  () at /usr/lib64/libglib-2.0.so.0
#4  0x00007f973865fcec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#5  0x00007f97421670de in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQtCore.so.4
#6  0x00007f9741570676 in  () at /usr/lib64/libQtGui.so.4
#7  0x00007f9742138e6f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQtCore.so.4
#8  0x00007f9742139165 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQtCore.so.4
#9  0x00007f974213e5b9 in QCoreApplication::exec() () at /usr/lib64/libQtCore.so.4
#10 0x0000000000402f3f in  ()
#11 0x00007f9740a50b05 in __libc_start_main () at /lib64/libc.so.6
#12 0x0000000000403414 in _start ()

Created attachment 91566 [details]
New crash information added by DrKonqi

kmail (4.14.5) on KDE Platform 4.14.5 using Qt 4.8.6

I did nothing - as usual this occurs while Kmail is idle.

-- Backtrace (Reduced):
#5  0x00007f9d94c7eb3e in  () at /lib64/libdbus-1.so.3
#6  0x00007f9d94c77bc2 in  () at /lib64/libdbus-1.so.3
[...]
#8  0x00007f9d9d26cb09 in QDBusArgument::~QDBusArgument() () at /usr/lib64/libQtDBus.so.4
#9  0x00007f9d9d24976e in  () at /usr/lib64/libQtDBus.so.4
#10 0x00007f9da084f9a3 in  () at /usr/lib64/libQtCore.so.4

I have noticed that after a zypper dup this happens with an increased propability.
I sadly cannot rule out the possibility that I had made a zypper dup for the past two backtraces. So there might be a mundane explanation for the crashes. Or not. I will keep an eye open, will be especially carefull and only report if it crashes without a prior zypper anything.

It seems to me that it is either fixed or more probably was my fault all along.