[Webkit-unassigned] [Bug 97175] New: Duplicate render objects should be removed when anonymous blocks are removed.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=97175

           Summary: Duplicate render objects should be removed when
                    anonymous blocks are removed.
           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: tasak at google.com


When some block element is inserted into inline element, anonymous render blocks will be created and 2 renderer of the inline element will be created under different anonymous render block. For example,

<span style="display: inline">
  <div></div>
</span>

Its render tree looks like:

RenderBlock (anonymous)
    RenderInline {SPAN}
RenderBlock (anonymous)
    RenderBlock {DIV}
RenderBlock (anonymous)
    RenderInline {SPAN}

When the <div> is removed, the RenderBlock(anonymous) will be removed in RenderBlock::removeChild. However, the code doesn't destroy duplicate RenderInline{SPAN}. So,

RenderInline {SPAN}
RenderInline {SPAN}

Two RenderInline{SPAN} still exist. This is the problem.

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