[Webkit-unassigned] [Bug 123329] New: [CSS Regions] Fix Assert SHOULD NEVER BE REACHED in RenderLayer::enclosingElement()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=123329

           Summary: [CSS Regions] Fix Assert SHOULD NEVER BE REACHED in
                    RenderLayer::enclosingElement()
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Keywords: AdobeTracked
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mmaerean at adobe.com
                CC: WebkitBugTracker at adobe.com
        Depends on: 84900


Created an attachment (id=215154)
 --> (https://bugs.webkit.org/attachment.cgi?id=215154&action=review)
layout test causing an assert

SHOULD NEVER BE REACHED
/Volumes/.../WebKit/Source/WebCore/rendering/RenderLayer.cpp(4445) : WebCore::Element *WebCore::RenderLayer::enclosingElement() const
1   0x10da273f0 WTFCrash
2   0x10fda0585 WebCore::RenderLayer::enclosingElement() const
3   0x10fda20bb WebCore::RenderLayer::hitTestContents
4   0x10fda1eb1 WebCore::RenderLayer::hitTestContentsForFragments
5   0x10fda0082 WebCore::RenderLayer::hitTestLayer
6   0x10fd9f285 WebCore::RenderLayer::hitTest
7   0x10fd41086 WebCore::RenderFlowThread::hitTestFlowThreadPortionInRegion
8   0x10fe3be64 WebCore::RenderRegion::hitTestContents
9   0x10fc84a90 WebCore::RenderBlock::nodeAtPoint
10  0x10fc85451 WebCore::RenderBlock::hitTestContents
11  0x10fc84a90 WebCore::RenderBlock::nodeAtPoint
12  0x10fe31639 WebCore::RenderObject::hitTest
13  0x10fda2007 WebCore::RenderLayer::hitTestContents
...
20  0x10fd9f285 WebCore::RenderLayer::hitTest
21  0x10ff2fb2f WebCore::RenderView::hitTest
22  0x10ff2fae4 WebCore::RenderView::hitTest
23  0x10ee2a4cb WebCore::Document::prepareMouseEvent
24  0x10efcbbba WebCore::EventHandler::prepareMouseEvent
25  0x10efcc0cf WebCore::EventHandler::handleMouseMoveEvent
26  0x10efcbc56 WebCore::EventHandler::mouseMoved
27  0x10be63708 WebKit::handleMouseEvent
28  0x10be63507 WebKit::WebPage::mouseEvent

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