[Webkit-unassigned] [Bug 66142] New: [CSSRegions] RenderRegion should not reference a parent RenderFlowThread

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=66142

           Summary: [CSSRegions] RenderRegion should not reference a
                    parent RenderFlowThread
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: achicu at adobe.com


Because RenderRegion can actually be part of other RenderFlowThreads we need to check that it is not actually trying to display a parent RenderFlowThread.

Example:

<div style="flow: 'flow1';">
    <div style="content: from-flow:'flow1'></div>
</div>

Also we need to check for circular dependencies like the following one:

<div style="flow: 'flow1';">
    <div style="content: from-flow:'flow2'></div>
</div>

<div style="flow: 'flow2';">
    <div style="content: from-flow:'flow1'></div>
</div>

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