[Webkit-unassigned] [Bug 63136] New: webkit.dll!WebCore::Position::Position DebugBreak (741bf64f0ba0949baaa5b919dc2b79b1)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=63136

           Summary: webkit.dll!WebCore::Position::Position DebugBreak
                    (741bf64f0ba0949baaa5b919dc2b79b1)
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Windows Vista
            Status: NEW
          Severity: Normal
          Priority: P1
         Component: HTML DOM
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: skylined at chromium.org
                CC: eric at webkit.org


Chromium: https://code.google.com/p/chromium/issues/detail?id=87079

Repro:
1) open chrome://settings/clearBrowserData in a DEBUG build of Chrome

We hits the first ASSERT in this code:
Position::Position(PassRefPtr<Node> anchorNode, AnchorType anchorType)
    : m_anchorNode(anchorNode)
    , m_offset(0)
    , m_anchorType(anchorType)
    , m_isLegacyEditingPosition(false)
{
    ASSERT(!m_anchorNode || !m_anchorNode->isShadowRoot());
    ASSERT(anchorType != PositionIsOffsetInAnchor);
}

Chrome continues to run just fine if you ignore this, non-DEBUG builds don't have it.

id:             webkit.dll!WebCore::Position::Position DebugBreak (741bf64f0ba0949baaa5b919dc2b79b1)
description:    Debugger breakpoint in webkit.dll!WebCore::Position::Position
application:    Chromium 14.0.800.0
stack:          webkit.dll!WebCore::Position::Position
                webkit.dll!WebCore::positionBeforeNode
                webkit.dll!WebCore::firstPositionInOrBeforeNode
                webkit.dll!WebCore::previousLinePosition
                webkit.dll!WebCore::AccessibilityObject::lineForPosition
                webkit.dll!WebKit::WebAccessibilityObject::lineBreaks
                chrome.dll!webkit_glue::WebAccessibility::Init
                chrome.dll!webkit_glue::WebAccessibility::WebAccessibility
                chrome.dll!webkit_glue::WebAccessibility::Init
                chrome.dll!webkit_glue::WebAccessibility::WebAccessibility
                chrome.dll!webkit_glue::WebAccessibility::Init
                chrome.dll!webkit_glue::WebAccessibility::WebAccessibility
                chrome.dll!webkit_glue::WebAccessibility::Init
                chrome.dll!webkit_glue::WebAccessibility::WebAccessibility
                chrome.dll!RenderView::SendPendingAccessibilityNotifications
                chrome.dll!DispatchToMethod<RenderView,void
                chrome.dll!ScopedRunnableMethodFactory<...>::RunnableMethod<void
                base.dll!`anonymous namespace'::TaskClosureAdapter::Run
                base.dll!base::internal::Invoker1<0,base::internal::InvokerStorage1<void
                base.dll!base::Callback<void __cdecl
                base.dll!MessageLoop::RunTask
                base.dll!MessageLoop::DeferOrRunPendingTask
                base.dll!MessageLoop::DoWork
                base.dll!base::MessagePumpDefault::Run
                base.dll!MessageLoop::RunInternal
                base.dll!MessageLoop::RunHandler
                base.dll!MessageLoop::Run
                ...

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