Again DrKonqi was unable to properly login into KDE Bugzilla (see e.g. bug #338868,  "Error sending the crash report: /Received unexpected error code 410 from bugzilla. Error message was: You must login before using this part of KDE Bugtracking System../"), thus I paste the kcrash report below. The report does not contain the KDE product and component, which DrKonqi identified, so I guessed instead.

Application: kmail (4.13.3)
KDE Platform Version: 4.13.3
Qt Version: 4.8.6
Operating System: Linux 3.13.0-35-generic x86_64
Distribution: Ubuntu 14.04.1 LTS

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

KMail was showing me the certificate approval dialogue (because the server used a self-signed certificate). While leaving the dialogue open, I changed the server certificate and restarted it. Then I closed (cancelled) the certificate approval dialogue and KMail crashed.

-- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f3d2d66e800 (LWP 11154))]

Thread 5 (Thread 0x7f3d04f7e700 (LWP 11165)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f3d1ef6c81d in WTF::TCMalloc_PageHeap::scavengerThread() () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f3d1ef6c859 in WTF::TCMalloc_PageHeap::runScavengerThread(void*) () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f3d28292182 in start_thread (arg=0x7f3d04f7e700) at pthread_create.c:312
#4  0x00007f3d2a9d0fbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7f3cc3dec700 (LWP 11166)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f3d1ecad20d in JSC::BlockAllocator::blockFreeingThreadMain() () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f3d1ef9bfd6 in WTF::wtfThreadEntryPoint(void*) () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f3d28292182 in start_thread (arg=0x7f3cc3dec700) at pthread_create.c:312
#4  0x00007f3d2a9d0fbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f3cc2f2d700 (LWP 11169)):
#0  0x00007f3d22a9062a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f3d22a90989 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3d22a4ebc6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3d22a4f048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f3d22a4f0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f3d2b3607be in QEventDispatcherGlib::processEvents (this=0x7f3cb40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0x00007f3d2b3320af in QEventLoop::processEvents (this=this@entry=0x7f3cc2f2cde0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f3d2b3323a5 in QEventLoop::exec (this=this@entry=0x7f3cc2f2cde0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f3d2b22ec5f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:537
#9  0x00007f3d2b23132f in QThreadPrivate::start (arg=0x21e5d70) at thread/qthread_unix.cpp:349
#10 0x00007f3d28292182 in start_thread (arg=0x7f3cc2f2d700) at pthread_create.c:312
#11 0x00007f3d2a9d0fbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f3cb3198700 (LWP 11171)):
#0  0x00007f3d22a9062d in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f3d22a909b9 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3d22a4ea59 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3d22a4ef7b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f3d22a4f0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f3d2b3607be in QEventDispatcherGlib::processEvents (this=0x7f3cac0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0x00007f3d2b3320af in QEventLoop::processEvents (this=this@entry=0x7f3cb3197da0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f3d2b3323a5 in QEventLoop::exec (this=this@entry=0x7f3cb3197da0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f3d2b22ec5f in QThread::exec (this=this@entry=0x282f100) at thread/qthread.cpp:537
#9  0x00007f3d2b313823 in QInotifyFileSystemWatcherEngine::run (this=0x282f100) at io/qfilesystemwatcher_inotify.cpp:265
#10 0x00007f3d2b23132f in QThreadPrivate::start (arg=0x282f100) at thread/qthread_unix.cpp:349
#11 0x00007f3d28292182 in start_thread (arg=0x7f3cb3198700) at pthread_create.c:312
#12 0x00007f3d2a9d0fbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f3d2d66e800 (LWP 11154)):
[KCrash Handler]
#6  data (this=0x8) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:135
#7  qGetPtrHelper<QScopedPointer<QObjectData> > (p=...) at ../../include/QtCore/../../src/corelib/global/qglobal.h:2467
#8  d_func (this=0x0) at ../../include/QtCore/../../src/corelib/io/qiodevice.h:168
#9  QIODevice::write (this=0x0, data=0x2a62758 "LOGOUT", maxSize=6) at io/qiodevice.cpp:1311
#10 0x00007f3d1c46a817 in write (data=..., this=<optimized out>) at /usr/include/qt4/QtCore/qiodevice.h:127
#11 KManageSieve::Session::sendData (this=this@entry=0x267c2d0, data=...) at ../../../libksieve/kmanagesieve/session.cpp:381
#12 0x00007f3d1c46a96a in KManageSieve::Session::disconnectFromHost (this=this@entry=0x267c2d0, sendLogout=sendLogout@entry=true) at ../../../libksieve/kmanagesieve/session.cpp:95
#13 0x00007f3d1c46acbd in KManageSieve::Session::sslResult (this=0x267c2d0, encrypted=<optimized out>) at ../../../libksieve/kmanagesieve/session.cpp:347
#14 0x00007f3d2b34787a in QMetaObject::activate (sender=0x26a5c60, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3539
#15 0x00007f3d2cb672dd in KTcpSocket::qt_static_metacall (_o=0x0, _id=44443480, _a=0x6, _c=<optimized out>) at ./ktcpsocket.moc:86
#16 0x00007f3d2b34787a in QMetaObject::activate (sender=sender@entry=0x266d8a0, m=m@entry=0x7f3d29c50a20 <QSslSocket::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3539
#17 0x00007f3d299ea980 in QSslSocket::encrypted (this=this@entry=0x266d8a0) at .moc/release-shared/moc_qsslsocket.cpp:148
#18 0x00007f3d299f4c6d in QSslSocketBackendPrivate::startHandshake (this=this@entry=0x26757b0) at ssl/qsslsocket_openssl.cpp:1444
#19 0x00007f3d299f62ab in QSslSocketBackendPrivate::transmit (this=0x26757b0) at ssl/qsslsocket_openssl.cpp:1111
#20 0x00007f3d299efeb9 in QSslSocket::qt_static_metacall (_o=<optimized out>, _id=<optimized out>, _a=<optimized out>, _c=<optimized out>) at .moc/release-shared/moc_qsslsocket.cpp:97
#21 0x00007f3d2b34787a in QMetaObject::activate (sender=sender@entry=0x22fd9e0, m=m@entry=0x7f3d2b696540 <QIODevice::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3539
#22 0x00007f3d2b390720 in QIODevice::readyRead (this=this@entry=0x22fd9e0) at .moc/release-shared/moc_qiodevice.cpp:104
#23 0x00007f3d299d0ccd in QAbstractSocketPrivate::canReadNotification (this=0x26b2740) at socket/qabstractsocket.cpp:654
#24 0x00007f3d299d9cfd in QReadNotifier::event (this=<optimized out>, e=<optimized out>) at socket/qnativesocketengine.cpp:1151
#25 0x00007f3d2b864e2c in QApplicationPrivate::notify_helper (this=this@entry=0x1ac6de0, receiver=receiver@entry=0x24aca10, e=e@entry=0x7fffebc76d50) at kernel/qapplication.cpp:4567
#26 0x00007f3d2b86b4a0 in QApplication::notify (this=this@entry=0x7fffebc77340, receiver=receiver@entry=0x24aca10, e=e@entry=0x7fffebc76d50) at kernel/qapplication.cpp:4353
#27 0x00007f3d2d0a0d1a in KApplication::notify (this=0x7fffebc77340, receiver=0x24aca10, event=0x7fffebc76d50) at ../../kdeui/kernel/kapplication.cpp:311
#28 0x00007f3d2b3334dd in QCoreApplication::notifyInternal (this=0x7fffebc77340, receiver=0x24aca10, event=event@entry=0x7fffebc76d50) at kernel/qcoreapplication.cpp:953
#29 0x00007f3d2b3614a8 in sendEvent (event=0x7fffebc76d50, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#30 socketNotifierSourceDispatch (source=0x1ac0f70) at kernel/qeventdispatcher_glib.cpp:117
#31 0x00007f3d22a4ee04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007f3d22a4f048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007f3d22a4f0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007f3d2b3607a1 in QEventDispatcherGlib::processEvents (this=0x1a4cb20, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#35 0x00007f3d2b906bb6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#36 0x00007f3d2b3320af in QEventLoop::processEvents (this=this@entry=0x7fffebc76f90, flags=...) at kernel/qeventloop.cpp:149
#37 0x00007f3d2b3323a5 in QEventLoop::exec (this=this@entry=0x7fffebc76f90, flags=...) at kernel/qeventloop.cpp:204
#38 0x00007f3d2b337b79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#39 0x00007f3d2b86337c in QApplication::exec () at kernel/qapplication.cpp:3828
#40 0x0000000000402d18 in main (argc=<optimized out>, argv=<optimized out>) at ../../kmail/main.cpp:146

Possible duplicates by query: bug 325024.

Reproducible: Always