Could you provide us the archive that caused the crash?

Ok, I can now reproduce this bug every time:

1. mkdir test
2. open libreoffice and save a (empty) test/test.docx
3. zip -r test.zip test
4. ark test.zip
5. double click on test.docx inside ark

You will see a second instance of ark displaying the content of the docx file (as docx seems to be a archive, too - I didn't know that).

Mh ok, this is not, what you wanted to see:
6. close the second ark
7. close the ark containing the test.zip (because you are frustrated ;) )

You will get a message of the systems crash reporting tool (or at least I get this message every time ;) )

Created attachment 95681 [details]
A zip containing a test docx

Sounds like a duplicate of #341187, even though the backtrace is different. I will investigate (btw the crash is not reproducible with Ark 15.12).

Just to be sure: can you provide the backtrace that you get after reproducing the crash as you described in comment #2?

Yes, of course:

-- Backtrace:
Application: Ark (ark), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
84	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[KCrash Handler]
#6  0x0000000000000000 in  ()
#7  0x00007fecbb091c3a in QWidget::ensurePolished() const (this=0x55d005abd9a0) at kernel/qwidget.cpp:9733
#8  0x00007fecbb4b5c79 in QSplitter::sizes() const (this=<optimized out>) at widgets/qsplitter.cpp:1649
#9  0x00007feca0c5b84b in Ark::Part::saveSplitterSizes() () at /usr/lib64/kde4/arkpart.so
#10 0x00007feca0c5ba99 in Ark::Part::~Part() () at /usr/lib64/kde4/arkpart.so
#11 0x00007feca0c5bb39 in Ark::Part::~Part() () at /usr/lib64/kde4/arkpart.so
#12 0x00007fecba10fd21 in QObjectPrivate::deleteChildren() (this=this@entry=0x55d005b676f0) at kernel/qobject.cpp:1935
#13 0x00007fecbb094b12 in QWidget::~QWidget() (this=0x55d005b67120, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1679
#14 0x00007feca0c68ff4 in ArkViewer::~ArkViewer() () at /usr/lib64/kde4/arkpart.so
#15 0x00007fecba10fd21 in QObjectPrivate::deleteChildren() (this=this@entry=0x55d0058fb450) at kernel/qobject.cpp:1935
#16 0x00007fecbb094b12 in QWidget::~QWidget() (this=0x55d0058f8fc0, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1679
#17 0x00007fecbb4b6149 in QSplitter::~QSplitter() (this=0x55d0058f8fc0, __in_chrg=<optimized out>) at widgets/qsplitter.cpp:1056
#18 0x00007fecbccbca2f in KParts::Part::~Part() (this=0x55d0058f4c40, __vtt_parm=0x7feca0e80320, __in_chrg=<optimized out>) at ../../kparts/part.cpp:209
#19 0x00007feca0c5badd in Ark::Part::~Part() () at /usr/lib64/kde4/arkpart.so
#20 0x00007feca0c5bb39 in Ark::Part::~Part() () at /usr/lib64/kde4/arkpart.so
#21 0x000055d003bd501e in MainWindow::~MainWindow() ()
#22 0x000055d003bd50f9 in MainWindow::~MainWindow() ()
#23 0x00007fecba111848 in QObject::event(QEvent*) (this=this@entry=0x55d0057d9ff0, e=e@entry=0x55d005b6bb90) at kernel/qobject.cpp:1203
#24 0x00007fecbb0955ac in QWidget::event(QEvent*) (this=this@entry=0x55d0057d9ff0, event=event@entry=0x55d005b6bb90) at kernel/qwidget.cpp:8859
#25 0x00007fecbb475393 in QMainWindow::event(QEvent*) (this=this@entry=0x55d0057d9ff0, event=event@entry=0x55d005b6bb90) at widgets/qmainwindow.cpp:1478
#26 0x00007fecbbe929a1 in KMainWindow::event(QEvent*) (this=this@entry=0x55d0057d9ff0, ev=ev@entry=0x55d005b6bb90) at ../../kdeui/widgets/kmainwindow.cpp:1126
#27 0x00007fecbbed0069 in KXmlGuiWindow::event(QEvent*) (this=0x55d0057d9ff0, ev=0x55d005b6bb90) at ../../kdeui/xmlgui/kxmlguiwindow.cpp:126
#28 0x00007fecbb03e93c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=0x55d0056e32b0, receiver=0x55d0057d9ff0, e=0x55d005b6bb90) at kernel/qapplication.cpp:4565
#29 0x00007fecbb045796 in QApplication::notify(QObject*, QEvent*) (this=this@entry=0x7ffde063b9c0, receiver=receiver@entry=0x55d0057d9ff0, e=e@entry=0x55d005b6bb90) at kernel/qapplication.cpp:4351
#30 0x00007fecbbdca54a in KApplication::notify(QObject*, QEvent*) (this=0x7ffde063b9c0, receiver=0x55d0057d9ff0, event=0x55d005b6bb90) at ../../kdeui/kernel/kapplication.cpp:311
#31 0x00007fecba0f78dd in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7ffde063b9c0, receiver=receiver@entry=0x55d0057d9ff0, event=event@entry=0x55d005b6bb90) at kernel/qcoreapplication.cpp:955
#32 0x00007fecba0faef6 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (event=0x55d005b6bb90, receiver=0x55d0057d9ff0) at kernel/qcoreapplication.h:231
#33 0x00007fecba0faef6 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x55d00569ff50) at kernel/qcoreapplication.cpp:1579
#34 0x00007fecba0fb1d3 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1472
#35 0x00007fecba127d1e in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) () at kernel/qcoreapplication.h:236
#36 0x00007fecba127d1e in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x55d0056ce670) at kernel/qeventdispatcher_glib.cpp:300
#37 0x00007fecb4af4e3a in g_main_context_dispatch (context=0x55d0056e3b90) at gmain.c:3154
#38 0x00007fecb4af4e3a in g_main_context_dispatch (context=context@entry=0x55d0056e3b90) at gmain.c:3769
#39 0x00007fecb4af51d0 in g_main_context_iterate (context=context@entry=0x55d0056e3b90, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3840
#40 0x00007fecb4af527c in g_main_context_iteration (context=0x55d0056e3b90, may_block=may_block@entry=1) at gmain.c:3901
#41 0x00007fecba127e8e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x55d0056a1820, flags=...) at kernel/qeventdispatcher_glib.cpp:450
#42 0x00007fecbb0e73e6 in QGuiEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:207
#43 0x00007fecba0f6151 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffde063b8b0, flags=...) at kernel/qeventloop.cpp:149
#44 0x00007fecba0f64c5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffde063b8b0, flags=...) at kernel/qeventloop.cpp:204
#45 0x00007fecba0fc069 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1227
#46 0x000055d003bd02dd in main ()

I can confirm that the crash is reproducible on Fedora 23 with KDE4 and Ark 15.04.3, with any archive which contains another archive (i.e. not necessarily docx files).
While the issue is exactly the same described in bug #341187, I'm not marking this report as duplicate because, for some reason, the backtrace is different. Since I cannot reproduce it on Ark 15.12, I'm assuming that the bug got fixed somewhere in the past months.

*** Bug 356475 has been marked as a duplicate of this bug. ***

*** Bug 357109 has been marked as a duplicate of this bug. ***