Application: kmailcvt (4.14.8)
KDE Platform Version: 4.14.8 (Compiled from sources)
Qt Version: 4.8.6
Operating System: Linux 4.0.5-gentoo x86_64
Distribution (Platform): Gentoo Packages

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

Importing emails into KMail 4.14.8 from another machine, from a maildir which was created by KMail (4.11.5).  From the time at which the crash occurred, there were still plenty of mails to be imported.

- Special things I noted:

KMail's counter of unread emails increased and stayed constant at 47818. I have no idea if this is related though.

-- Backtrace:
Application: KMailCVT (kmailcvt), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f2d0c04a780 (LWP 15940))]

Thread 2 (Thread 0x7f2cef9ff700 (LWP 16235)):
#0  0x00007f2d08d40afd in read () from /lib64/libc.so.6
#1  0x00007f2d02f27250 in g_wakeup_acknowledge () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f2d02ee7ab9 in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f2d02ee7f08 in g_main_context_iterate.isra () from /usr/lib64/libglib-2.0.so.0
#4  0x00007f2d02ee8074 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#5  0x00007f2d096c68de in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#6  0x00007f2d09698c77 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#7  0x00007f2d09698f3d in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#8  0x00007f2d0959899f in QThread::exec() () from /usr/lib64/qt4/libQtCore.so.4
#9  0x00007f2d0967a423 in QInotifyFileSystemWatcherEngine::run() () from /usr/lib64/qt4/libQtCore.so.4
#10 0x00007f2d0959b08f in QThreadPrivate::start(void*) () from /usr/lib64/qt4/libQtCore.so.4
#11 0x00007f2d034d8344 in start_thread () from /lib64/libpthread.so.0
#12 0x00007f2d08d4d46d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f2d0c04a780 (LWP 15940)):
[KCrash Handler]
#6  0x00007f2d0b248d1d in assignEntityPrivate(QSharedDataPointer<Akonadi::EntityPrivate>&, QSharedDataPointer<Akonadi::EntityPrivate> const&) () from /usr/lib64/libakonadi-kde.so.4
#7  0x00007f2d0b248ded in Akonadi::Entity::Entity(Akonadi::Entity const&) () from /usr/lib64/libakonadi-kde.so.4
#8  0x00007f2d0b8ced8c in MailImporter::FilterInfo::rootCollection() const () from /usr/lib64/libmailimporter.so.4
#9  0x00007f2d0b8d04ba in MailImporter::Filter::parseFolderString(QString const&) () from /usr/lib64/libmailimporter.so.4
#10 0x00007f2d0b8d1807 in MailImporter::Filter::doAddMessage(QString const&, QString const&, bool, Akonadi::MessageStatus) () from /usr/lib64/libmailimporter.so.4
#11 0x00007f2d0b8ed137 in MailImporter::FilterKMail_maildir::importFiles(QString const&) () from /usr/lib64/libmailimporter.so.4
#12 0x00007f2d0b8edaf1 in MailImporter::FilterKMail_maildir::importDirContents(QString const&) () from /usr/lib64/libmailimporter.so.4
#13 0x00007f2d0b8edc68 in MailImporter::FilterKMail_maildir::processDirectory(QString const&) () from /usr/lib64/libmailimporter.so.4
#14 0x00007f2d0b8edc68 in MailImporter::FilterKMail_maildir::processDirectory(QString const&) () from /usr/lib64/libmailimporter.so.4
#15 0x00007f2d0b8ee045 in MailImporter::FilterKMail_maildir::importMails(QString const&) () from /usr/lib64/libmailimporter.so.4
#16 0x00007f2d0b8ee7b0 in MailImporter::FilterKMail_maildir::import() () from /usr/lib64/libmailimporter.so.4
#17 0x000000000040b1b4 in KMailCVT::next() ()
#18 0x00007f2d096adb4a in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/qt4/libQtCore.so.4
#19 0x00007f2d0aceeac8 in KDialog::slotButtonClicked(int) () from /usr/lib64/libkdeui.so.5
#20 0x00007f2d0acf0337 in KDialog::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) [clone .part.51] () from /usr/lib64/libkdeui.so.5
#21 0x00007f2d096adb4a in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/qt4/libQtCore.so.4
#22 0x00007f2d096b51be in QSignalMapper::mapped(int) () from /usr/lib64/qt4/libQtCore.so.4
#23 0x00007f2d096b52b6 in QSignalMapper::map(QObject*) () from /usr/lib64/qt4/libQtCore.so.4
#24 0x00007f2d096adb4a in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/qt4/libQtCore.so.4
#25 0x00007f2d0a6bb5aa in QAbstractButton::clicked(bool) () from /usr/lib64/qt4/libQtGui.so.4
#26 0x00007f2d0a423b23 in QAbstractButtonPrivate::emitClicked() () from /usr/lib64/qt4/libQtGui.so.4
#27 0x00007f2d0a424c33 in QAbstractButtonPrivate::click() () from /usr/lib64/qt4/libQtGui.so.4
#28 0x00007f2d0a424d1c in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib64/qt4/libQtGui.so.4
#29 0x00007f2d0a0e5789 in QWidget::event(QEvent*) () from /usr/lib64/qt4/libQtGui.so.4
#30 0x00007f2d0a096fcc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/qt4/libQtGui.so.4
#31 0x00007f2d0a09d6e2 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/qt4/libQtGui.so.4
#32 0x00007f2d0ad8a032 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#33 0x00007f2d09699ffc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/qt4/libQtCore.so.4
#34 0x00007f2d0a09ceeb in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib64/qt4/libQtGui.so.4
#35 0x00007f2d0a10d64b in QETWidget::translateMouseEvent(_XEvent const*) () from /usr/lib64/qt4/libQtGui.so.4
#36 0x00007f2d0a10c0bc in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib64/qt4/libQtGui.so.4
#37 0x00007f2d0a132812 in x11EventSourceDispatch(_GSource*, int (*)(void*), void*) () from /usr/lib64/qt4/libQtGui.so.4
#38 0x00007f2d02ee7dbb in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#39 0x00007f2d02ee7fd0 in g_main_context_iterate.isra () from /usr/lib64/libglib-2.0.so.0
#40 0x00007f2d02ee8074 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#41 0x00007f2d096c68de in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#42 0x00007f2d0a1328be in QGuiEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtGui.so.4
#43 0x00007f2d09698c77 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#44 0x00007f2d09698f3d in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/qt4/libQtCore.so.4
#45 0x00007f2d0969e1f9 in QCoreApplication::exec() () from /usr/lib64/qt4/libQtCore.so.4
#46 0x00000000004080bc in main ()

Reported using DrKonqi