[Webkit-unassigned] [Bug 29439] New: [Qt] Webkit might crash while updating scrollbar

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=29439

           Summary: [Qt] Webkit might crash while updating scrollbar
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Other
        OS/Version: Mac OS X 10.5
            Status: NEW
          Keywords: Qt
          Severity: Normal
          Priority: P2
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: vestbo at webkit.org


This bug report originated from issue QTBUG-4273
<http://bugreports.qt.nokia.com/browse/QTBUG-4273>

--- Description ---

How to reproduce the problem:
1. Compile "fancybrowser" example
2. Open
http://trac.webkit.org/export/41842/trunk/LayoutTests/scrollbars/overflow-scrollbar-combinations.html
3. Resize window and press reload button
4. You will recieve crash with next call stack:

QtWebKitd4.dll!WebCore::RenderScrollbar::updateScrollbarPart(WebCore::ScrollbarPart
partType=ScrollbarBGPart, bool destroy=true) Line 219 + 0x8 bytes C++
QtWebKitd4.dll!WebCore::RenderScrollbar::updateScrollbarParts(bool
destroy=true) Line 133 C++
QtWebKitd4.dll!WebCore::RenderScrollbar::setParent(WebCore::ScrollView *
parent=0x00000000) Line 56 C++
QtWebKitd4.dll!WebCore::ScrollView::removeChild(WebCore::Widget *
child=0x038c7038) Line 75 C++
QtWebKitd4.dll!WebCore::ScrollView::setHasVerticalScrollbar(bool hasBar=false)
Line 98 C++
QtWebKitd4.dll!WebCore::FrameView::~FrameView() Line 205 C++
QtWebKitd4.dll!WebCore::FrameView::`scalar deleting destructor'() + 0xf bytes
C++
QtWebKitd4.dll!WebCore::FrameView::deref() Line 68 + 0x4a bytes C++
QtWebKitd4.dll!WTF::RefPtr<WebCore::FrameView>::operator=(WebCore::FrameView *
optr=0x00000000) Line 123 C++
QtWebKitd4.dll!WebCore::Frame::setView(WebCore::FrameView * view=0x00000000)
Line 220 C++
QtWebKitd4.dll!WebCore::FrameLoaderClient::transitionToCommittedForNewPage(WebCore::Frame
* frame=0x0154b560, const WebCore::IntSize & viewportSize={...}, const
WebCore::Color & backgroundColor={...}, bool transparent=false, const
WebCore::IntSize & fixedLayoutSize={...}, bool useFixedLayout=false,
WebCore::ScrollbarMode horizontalScrollbarMode=ScrollbarAuto,
WebCore::ScrollbarMode verticalScrollbarMode=ScrollbarAuto) Line 64 C++
QtWebKitd4.dll!WebCore::FrameLoaderClientQt::transitionToCommittedForNewPage()
Line 223 + 0x75 bytes C++
QtWebKitd4.dll!WebCore::FrameLoader::transitionToCommitted(WTF::PassRefPtr<WebCore::CachedPage>
cachedPage={...}) Line 2801 C++
QtWebKitd4.dll!WebCore::FrameLoader::commitProvisionalLoad(WTF::PassRefPtr<WebCore::CachedPage>
prpCachedPage={...}) Line 2721 C++
QtWebKitd4.dll!WebCore::DocumentLoader::commitIfReady() Line 335 C++
QtWebKitd4.dll!WebCore::DocumentLoader::commitLoad(const char *
data=0x039d5300, int length=1043) Line 354 C++
QtWebKitd4.dll!WebCore::DocumentLoader::receivedData(const char *
data=0x039d5300, int length=1043) Line 368 C++
QtWebKitd4.dll!WebCore::FrameLoader::receivedData(const char * data=0x039d5300,
int length=1043) Line 2342 C++
QtWebKitd4.dll!WebCore::MainResourceLoader::addData(const char *
data=0x039d5300, int length=1043, bool allAtOnce=false) Line 147 C++
QtWebKitd4.dll!WebCore::ResourceLoader::didReceiveData(const char *
data=0x039d5300, int length=1043, __int64 lengthReceived=1043, bool
allAtOnce=false) Line 267 C++
QtWebKitd4.dll!WebCore::MainResourceLoader::didReceiveData(const char *
data=0x039d5300, int length=1043, __int64 lengthReceived=1043, bool
allAtOnce=false) Line 342 C++
QtWebKitd4.dll!WebCore::ResourceLoader::didReceiveData(WebCore::ResourceHandle
* __formal=0x03a92590, const char * data=0x039d5300, int length=1043, int
lengthReceived=1043) Line 418 C++
QtWebKitd4.dll!WebCore::QNetworkReplyHandler::forwardData() Line 339 C++
QtWebKitd4.dll!WebCore::QNetworkReplyHandler::qt_metacall(QMetaObject::Call
_c=InvokeMetaMethod, int _id=2, void * * _a=0x03a744a0) Line 74 C++
QtCored4.dll!QMetaCallEvent::placeMetaCall(QObject * object=0x0395efd8) Line
478 C++
QtCored4.dll!QObject::event(QEvent * e=0x03a886b0) Line 1102 + 0x14 bytes C++
QtGuid4.dll!QApplicationPrivate::notify_helper(QObject * receiver=0x0395efd8,
QEvent * e=0x03a886b0) Line 4056 + 0x11 bytes C++
QtGuid4.dll!QApplication::notify(QObject * receiver=0x0395efd8, QEvent *
e=0x03a886b0) Line 3603 + 0x10 bytes C++
QtCored4.dll!QCoreApplication::notifyInternal(QObject * receiver=0x0395efd8,
QEvent * event=0x03a886b0) Line 610 + 0x15 bytes C++
QtCored4.dll!QCoreApplication::sendEvent(QObject * receiver=0x0395efd8, QEvent
* event=0x03a886b0) Line 213 + 0x39 bytes C++
QtCored4.dll!QCoreApplicationPrivate::sendPostedEvents(QObject *
receiver=0x00000000, int event_type=0, QThreadData * data=0x007f7200) Line 1247
+ 0xd bytes C++
QtCored4.dll!QEventDispatcherWin32::processEvents(QFlags<enum
QEventLoop::ProcessEventsFlag> flags={...}) Line 679 + 0x10 bytes C++
QtGuid4.dll!QGuiEventDispatcherWin32::processEvents(QFlags<enum
QEventLoop::ProcessEventsFlag> flags={...}) Line 1182 + 0x15 bytes C++
QtCored4.dll!QEventLoop::processEvents(QFlags<enum
QEventLoop::ProcessEventsFlag> flags={...}) Line 150 C++
QtCored4.dll!QEventLoop::exec(QFlags<enum QEventLoop::ProcessEventsFlag>
flags={...}) Line 201 + 0x2d bytes C++
QtCored4.dll!QCoreApplication::exec() Line 888 + 0x15 bytes C++
QtGuid4.dll!QApplication::exec() Line 3526 C++
fancybrowser.exe!main(int argc=1, char * * argv=0x007f70c0) Line 50 + 0x6 bytes
C++
fancybrowser.exe!_WinMain at 16() + 0xb9 bytes
fancybrowser.exe!__tmainCRTStartup() Line 574 + 0x35 bytes C
fancybrowser.exe!WinMainCRTStartup() Line 399 C

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