ASSERT when pressing on "previous picture" arrow in flickrview example.

Stack trace from 5.1.0:
#0 0x00007ffff611cdb8 in WebCore::RenderObject::offsetFromAncestorContainer(WebCore::RenderObject*) const ()
from /home/mibrunin/qt5/qtbase/lib/libQt5WebKit.so.5
#1 0x00007ffff51e8714 in WebCore::(anonymous namespace)::absolutePathForRenderer(WebCore::RenderObject*) ()
from /home/mibrunin/qt5/qtbase/lib/libQt5WebKit.so.5
#2 0x00007ffff51e9a39 in WebCore::GestureTapHighlighter::pathForNodeHighlight(WebCore::Node const*) () from /home/mibrunin/qt5/qtbase/lib/libQt5WebKit.so.5
#3 0x00007ffff4b7c79e in WebKit::TapHighlightController::highlight (
this=0x7fffd8036360, node=0x1316c30)
at WebProcess/WebPage/TapHighlightController.cpp:60
#4 0x00007ffff4b935fe in WebKit::WebPage::highlightPotentialActivation (
this=0x7fffd8035f00, point=..., area=...)
at WebProcess/WebPage/WebPage.cpp:1735
#5 0x00007ffff4c1aaf7 in CoreIPC::callMemberFunction<WebKit::WebPage, void (WebKit::WebPage::*)(WebCore::IntPoint const&, WebCore::IntSize const&), WebCore::IntPoint, WebCore::IntSize> (args=..., object=0x7fffd8035f00, function=
(void (WebKit::WebPage::*)(WebKit::WebPage * const, const WebCore::IntPoint &, const WebCore::IntSize &)) 0x7ffff4b9339e <WebKit::WebPage::highlightPotentialActivation(WebCore::IntPoint const&, WebCore::IntSize const&)>)
at Platform/CoreIPC/HandleMessage.h:27
#6 0x00007ffff4c17f4a in CoreIPC::handleMessage<Messages::WebPage::HighlightPotentialActivation, WebKit::WebPage, void (WebKit::WebPage::*)(WebCore::IntPoint c--Type <return> to continue, or q <return> to quit--
onst&, WebCore::IntSize const&)> (decoder=..., object=0x7fffd8035f00, function=
(void (WebKit::WebPage::*)(WebKit::WebPage * const, const WebCore::IntPoint &, const WebCore::IntSize &)) 0x7ffff4b9339e <WebKit::WebPage::highlightPotentialActivation(WebCore::IntPoint const&, WebCore::IntSize const&)>)
at Platform/CoreIPC/HandleMessage.h:322
#7 0x00007ffff4c127eb in WebKit::WebPage::didReceiveWebPageMessage (
this=0x7fffd8035f00, decoder=...)
at generated/WebPageMessageReceiver.cpp:138
#8 0x00007ffff4b97864 in WebKit::WebPage::didReceiveMessage (
this=0x7fffd8035f00, connection=0x6f77f0, messageID=..., decoder=...)
at WebProcess/WebPage/WebPage.cpp:2913
#9 0x00007ffff493645f in CoreIPC::MessageReceiverMap::dispatchMessage (
this=0x6f64e8, connection=0x6f77f0, messageID=..., decoder=...)
at Platform/CoreIPC/MessageReceiverMap.cpp:86
#10 0x00007ffff4bab76e in WebKit::WebProcess::didReceiveMessage (
this=0x6f6490, connection=0x6f77f0, messageID=..., decoder=...)
at WebProcess/WebProcess.cpp:681
#11 0x00007ffff492ba30 in CoreIPC::Connection::dispatchMessage (this=0x6f77f0,
messageID=..., decoder=...) at Platform/CoreIPC/Connection.cpp:663
#12 0x00007ffff492bb9c in CoreIPC::Connection::dispatchMessage (this=0x6f77f0,
message=...) at Platform/CoreIPC/Connection.cpp:686
#13 0x00007ffff492bde7 in CoreIPC::Connection::dispatchOneMessage (
this=0x6f77f0) at Platform/CoreIPC/Connection.cpp:712
#14 0x00007ffff4935820 in WTF::FunctionWrapper<void (CoreIPC::Connection::*)()>::operator() (this=0x1a43800, c=0x6f77f0) at ../WTF/wtf/Functional.h:173
#15 0x00007ffff493562e in WTF::BoundFunctionImpl<WTF::FunctionWrapper<void (CoreIPC::Connection::)()>, void (CoreIPC::Connection)>::operator()() (
this=0x1a437f0) at ../WTF/wtf/Functional.h:405
#16 0x00007ffff52f7f46 in WebCore::RunLoop::performWork() ()
from /home/mibrunin/qt5/qtbase/lib/libQt5WebKit.so.5
#17 0x00007ffff39eb159 in QMetaCallEvent::placeMetaCall (this=0x13b79c0,
object=0x6f6220) at kernel/qobject.cpp:479
#18 0x00007ffff39ec072 in QObject::event (this=0x6f6220, e=0x13b79c0)
at kernel/qobject.cpp:1070
#19 0x00007ffff3df6672 in QApplicationPrivate::notify_helper (this=0x410360,
receiver=0x6f6220, e=0x13b79c0) at kernel/qapplication.cpp:3455
#20 0x00007ffff3df3e53 in QApplication::notify (this=0x40f260,
receiver=0x6f6220, e=0x13b79c0) at kernel/qapplication.cpp:2876
#21 0x00007ffff39b20f8 in QCoreApplication::notifyInternal (this=0x40f260,
receiver=0x6f6220, event=0x13b79c0) at kernel/qcoreapplication.cpp:871
#22 0x00007ffff39b5d5d in QCoreApplication::sendEvent (receiver=0x6f6220,
event=0x13b79c0) at kernel/qcoreapplication.h:232
#23 0x00007ffff39b31d8 in QCoreApplicationPrivate::sendPostedEvents (
receiver=0x0, event_type=0, data=0x4104d0)
at kernel/qcoreapplication.cpp:1473
#24 0x00007ffff39b2d9f in QCoreApplication::sendPostedEvents (receiver=0x0,
event_type=0) at kernel/qcoreapplication.cpp:1333
#25 0x00007ffff3a2321c in postEventSourceDispatch (s=0x41c570)
at kernel/qeventdispatcher_glib.cpp:279
#26 0x00007ffff05b9a5d in g_main_dispatch (context=0x41c480)
at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:2441
#27 g_main_context_dispatch (context=0x41c480)
at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3011
#28 0x00007ffff05ba258 in g_main_context_iterate (context=0x41c480,
block=<optimized out>, dispatch=1, self=<optimized out>)
at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3089
#29 0x00007ffff05ba429 in g_main_context_iteration (context=0x41c480,
may_block=1) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3152
#30 0x00007ffff3a23a81 in QEventDispatcherGlib::processEvents (this=0x412120,
flags=...) at kernel/qeventdispatcher_glib.cpp:426
#31 0x00007fffe94ef996 in QPAEventDispatcherGlib::processEvents (
this=0x412120, flags=...) at eventdispatchers/qeventdispatcher_glib.cpp:123
#32 0x00007ffff39aecb8 in QEventLoop::processEvents (this=0x7fffffffdd60,
flags=...) at kernel/qeventloop.cpp:136
#33 0x00007ffff39aef91 in QEventLoop::exec (this=0x7fffffffdd60, flags=...)
at kernel/qeventloop.cpp:212
#34 0x00007ffff39b2796 in QCoreApplication::exec ()
at kernel/qcoreapplication.cpp:1124
#35 0x00007ffff543998c in WebCore::RunLoop::run() ()
from /home/mibrunin/qt5/qtbase/lib/libQt5WebKit.so.5
#36 0x00007ffff4bbc67d in WebKit::WebProcessMainQt (app=0x40f260)
at WebProcess/qt/WebProcessMainQt.cpp:195
#37 0x0000000000400f5b in main (argc=2, argv=0x7fffffffe128)
at qt/MainQt.cpp:100