Application: ark (2.16)
KDE Platform Version: 4.6.5 (4.6.5)
Qt Version: 4.7.3
Operating System: Linux 3.1.5-zen+ x86_64
Distribution: Debian GNU/Linux testing (wheezy)

-- Information about the crash:
Steps to reproduce:
open any rar archive with html files inside;
view any html file via "view" button;
close viewer;
close archive;
got segfault.

The crash can be reproduced every time.

-- Backtrace:
Application: Ark (ark), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f1e92bdc760 (LWP 23717))]

Thread 3 (Thread 0x7f1e77fff700 (LWP 23719)):
#0  0x00007f1e8fb70e63 in select () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007f1e9027db81 in QProcessManager::run (this=0x7f1e905cf840) at io/qprocess_unix.cpp:245
#2  0x00007f1e901b5c05 in QThreadPrivate::start (arg=0x7f1e905cf840) at thread/qthread_unix.cpp:320
#3  0x00007f1e8cac5b40 in start_thread (arg=<optimized out>) at pthread_create.c:304
#4  0x00007f1e8fb7736d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f1e7ca83700 (LWP 23772)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f1e7680cbc7 in WTF::TCMalloc_PageHeap::scavengerThread (this=0x7f1e770bb4e0) at wtf/FastMalloc.cpp:2380
#2  0x00007f1e7680cd29 in WTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at wtf/FastMalloc.cpp:1501
#3  0x00007f1e8cac5b40 in start_thread (arg=<optimized out>) at pthread_create.c:304
#4  0x00007f1e8fb7736d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f1e92bdc760 (LWP 23717)):
[KCrash Handler]
#6  operator-> (this=0x20) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:113
#7  QHostAddress::isNull (this=0x20) at kernel/qhostaddress.cpp:858
#8  0x00007f1e77338050 in WebSslInfo::isValid() const () from /usr/lib/libkwebkit.so.1
#9  0x00007f1e77338360 in WebSslInfo::saveTo(QMap<QString, QVariant>&) const () from /usr/lib/libkwebkit.so.1
#10 0x00007f1e7732408e in KWebKitPartPrivate::slotSaveFrameState(QWebFrame*, QWebHistoryItem*) () from /usr/lib/libkwebkit.so.1
#11 0x00007f1e77326fc7 in KWebKitPartPrivate::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkwebkit.so.1
#12 0x00007f1e902aeafa in QMetaObject::activate (sender=0x1249cf0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fffff9d19f0) at kernel/qobject.cpp:3278
#13 0x00007f1e7657516f in QWebPage::saveFrameStateRequested (this=<optimized out>, _t1=0x1324a40, _t2=0x7fffff9d1a20) at ./moc_qwebpage.cpp:494
#14 0x00007f1e76555bce in WebCore::FrameLoaderClientQt::saveViewStateToItem (this=<optimized out>, item=0x7f1e7401dd80) at ../WebKit/qt/WebCoreSupport/FrameLoaderClientQt.cpp:777
#15 0x00007f1e76327719 in saveScrollPositionAndViewStateToItem (item=0x7f1e7401dd80, this=0x7f1e74038580) at loader/HistoryController.cpp:69
#16 WebCore::HistoryController::saveScrollPositionAndViewStateToItem (this=0x7f1e74038580, item=0x7f1e7401dd80) at loader/HistoryController.cpp:62
#17 0x00007f1e7631d3bc in WebCore::FrameLoader::detachFromParent (this=0x7f1e74038458) at loader/FrameLoader.cpp:2638
#18 0x00007f1e7657ac1b in QWebPage::~QWebPage (this=0x1249cf0, __in_chrg=<optimized out>) at ../WebKit/qt/Api/qwebpage.cpp:2054
#19 0x00007f1e773329a3 in WebPage::~WebPage() () from /usr/lib/libkwebkit.so.1
#20 0x00007f1e773329d6 in WebPage::~WebPage() () from /usr/lib/libkwebkit.so.1
#21 0x00007f1e7657ff6e in QWebViewPrivate::detachCurrentPage (this=0x124d100) at ../WebKit/qt/Api/qwebview.cpp:372
#22 0x00007f1e7657ff93 in ~QWebViewPrivate (this=0x124d100, __in_chrg=<optimized out>) at ../WebKit/qt/Api/qwebview.cpp:60
#23 QWebViewPrivate::~QWebViewPrivate (this=0x124d100, __in_chrg=<optimized out>) at ../WebKit/qt/Api/qwebview.cpp:61
#24 0x00007f1e7657fcbf in QWebView::~QWebView (this=0x124a050, __in_chrg=<optimized out>) at ../WebKit/qt/Api/qwebview.cpp:329
#25 0x00007f1e7732cf35 in WebView::~WebView() () from /usr/lib/libkwebkit.so.1
#26 0x00007f1e7732cf70 in WebView::~WebView() () from /usr/lib/libkwebkit.so.1
#27 0x00007f1e902ad9b5 in QObjectPrivate::deleteChildren (this=0x1389a00) at kernel/qobject.cpp:1955
#28 0x00007f1e90d093f3 in QWidget::~QWidget (this=0x124bf70, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1631
#29 0x00007f1e90d09699 in QWidget::~QWidget (this=0x124bf70, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1651
#30 0x00007f1e902ad9b5 in QObjectPrivate::deleteChildren (this=0x123d5f0) at kernel/qobject.cpp:1955
#31 0x00007f1e90d093f3 in QWidget::~QWidget (this=0x1229250, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1631
#32 0x00007f1e91ae1be9 in KVBox::~KVBox (this=0x1229250, __in_chrg=<optimized out>) at ../../kdeui/widgets/kvbox.cpp:29
#33 0x00007f1e902ad9b5 in QObjectPrivate::deleteChildren (this=0x122c4c0) at kernel/qobject.cpp:1955
#34 0x00007f1e90d093f3 in QWidget::~QWidget (this=0x1226f60, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1631
#35 0x00007f1e80d88829 in ?? () from /usr/lib/kde4/arkpart.so
#36 0x00007f1e902ad9b5 in QObjectPrivate::deleteChildren (this=0x10f2470) at kernel/qobject.cpp:1955
#37 0x00007f1e90d093f3 in QWidget::~QWidget (this=0x10e2f30, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1631
#38 0x00007f1e911062e9 in QSplitter::~QSplitter (this=0x10e2f30, __in_chrg=<optimized out>) at widgets/qsplitter.cpp:1056
#39 0x00007f1e922f13b3 in KParts::Part::~Part (this=0xf98000, __vtt_parm=0x7f1e80f9ba18, __in_chrg=<optimized out>) at ../../kparts/part.cpp:209
#40 0x00007f1e80d7c677 in ?? () from /usr/lib/kde4/arkpart.so
#41 0x00007f1e80d7c6c9 in ?? () from /usr/lib/kde4/arkpart.so
#42 0x000000000040e64d in _start ()

Reported using DrKonqi