Application: ark (2.19)
KDE Platform Version: 4.14.6 (Compiled from sources)
Qt Version: 4.8.6
Operating System: Linux 3.18.11 x86_64
Distribution (Platform): Slackware Packages

-- Information about the crash:
i opened a tar.gz as user that was owned by root but readable
from ark, i double clicked to open a tar.gz in the archive
it opened
i closed the tar.gz in the archive by clicking x
i closed the archive by clicking x
crash happened
does it every time :)
i am running slackware current, linux 3.18.11, kde 4.14.6
slackware 14.1 setup disk compiled kde then updated to current
my computer is a dell t3500 six core xeon

The crash can be reproduced every time.

-- Backtrace:
Application: Ark (ark), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[KCrash Handler]
#5  0x00007fd5e2e948c0 in KXMLGUIFactory::removeClient(KXMLGUIClient*) () at /usr/lib64/libkdeui.so.5
#6  0x00007fd5c7bf5154 in  () at /usr/lib64/kde4/arkpart.so
#7  0x00007fd5c7bf51e9 in  () at /usr/lib64/kde4/arkpart.so
#8  0x00007fd5e4152131 in KParts::Part::slotWidgetDestroyed() () at /usr/lib64/libkparts.so.4
#9  0x00007fd5e0e6edfa in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () at /usr/lib64/qt/lib/libQtCore.so.4
#10 0x00007fd5e0e6f80f in QObject::destroyed(QObject*) () at /usr/lib64/qt/lib/libQtCore.so.4
#11 0x00007fd5e0e73847 in QObject::~QObject() () at /usr/lib64/qt/lib/libQtCore.so.4
#12 0x00007fd5e20ac797 in QWidget::~QWidget() () at /usr/lib64/qt/lib/libQtGui.so.4
#13 0x00007fd5e24a4119 in QSplitter::~QSplitter() () at /usr/lib64/qt/lib/libQtGui.so.4
#14 0x00007fd5e0e71828 in QObjectPrivate::deleteChildren() () at /usr/lib64/qt/lib/libQtCore.so.4
#15 0x00007fd5e20ac703 in QWidget::~QWidget() () at /usr/lib64/qt/lib/libQtGui.so.4
#16 0x00007fd5e2e86bc9 in KVBox::~KVBox() () at /usr/lib64/libkdeui.so.5
#17 0x00007fd5e0e71828 in QObjectPrivate::deleteChildren() () at /usr/lib64/qt/lib/libQtCore.so.4
#18 0x00007fd5e20ac703 in QWidget::~QWidget() () at /usr/lib64/qt/lib/libQtGui.so.4
#19 0x00007fd5c7bff254 in  () at /usr/lib64/kde4/arkpart.so
#20 0x00007fd5e0e71828 in QObjectPrivate::deleteChildren() () at /usr/lib64/qt/lib/libQtCore.so.4
#21 0x00007fd5e20ac703 in QWidget::~QWidget() () at /usr/lib64/qt/lib/libQtGui.so.4
#22 0x00007fd5e24a4119 in QSplitter::~QSplitter() () at /usr/lib64/qt/lib/libQtGui.so.4
#23 0x00007fd5e4151c36 in KParts::Part::~Part() () at /usr/lib64/libkparts.so.4
#24 0x00007fd5c7bf5194 in  () at /usr/lib64/kde4/arkpart.so
#25 0x00007fd5c7bf51e9 in  () at /usr/lib64/kde4/arkpart.so
#26 0x000000000040e083 in  ()
#27 0x000000000040e139 in  ()
#28 0x00007fd5e0e732e8 in QObject::event(QEvent*) () at /usr/lib64/qt/lib/libQtCore.so.4
#29 0x00007fd5e20ad763 in QWidget::event(QEvent*) () at /usr/lib64/qt/lib/libQtGui.so.4
#30 0x00007fd5e2469293 in QMainWindow::event(QEvent*) () at /usr/lib64/qt/lib/libQtGui.so.4
#31 0x00007fd5e2e8b5a9 in KXmlGuiWindow::event(QEvent*) () at /usr/lib64/libkdeui.so.5
#32 0x00007fd5e205d18c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/qt/lib/libQtGui.so.4
#33 0x00007fd5e2063830 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/qt/lib/libQtGui.so.4
#34 0x00007fd5e2d9f94a in KApplication::notify(QObject*, QEvent*) () at /usr/lib64/libkdeui.so.5
#35 0x00007fd5e0e5b1cd in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /usr/lib64/qt/lib/libQtCore.so.4
#36 0x00007fd5e0e5e3b1 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/qt/lib/libQtCore.so.4
#37 0x00007fd5e0e8828e in  () at /usr/lib64/qt/lib/libQtCore.so.4
#38 0x00007fd5dc35cfc4 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#39 0x00007fd5dc35d208 in  () at /usr/lib64/libglib-2.0.so.0
#40 0x00007fd5dc35d2ac in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#41 0x00007fd5e0e883fe in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/qt/lib/libQtCore.so.4
#42 0x00007fd5e20fb0e6 in  () at /usr/lib64/qt/lib/libQtGui.so.4
#43 0x00007fd5e0e59e51 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/qt/lib/libQtCore.so.4
#44 0x00007fd5e0e5a165 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/qt/lib/libQtCore.so.4
#45 0x00007fd5e0e5f3b9 in QCoreApplication::exec() () at /usr/lib64/qt/lib/libQtCore.so.4
#46 0x000000000040a8ea in  ()
#47 0x00007fd5dfee19f0 in __libc_start_main () at /lib64/libc.so.6
#48 0x000000000040af79 in _start ()

Reported using DrKonqi