[Webkit-unassigned] [Bug 125449] New: Harden column splitting code against bad casts.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=125449

           Summary: Harden column splitting code against bad casts.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: lango at inf.u-szeged.hu


Consider merging http://src.chromium.org/viewvc/blink?view=revision&revision=148760

Make sure that |curr| is a descendant of |fromBlock|. We need to check in every iteration of the loop because moveChildrenTo could have moved |curr|. This is a mitigation and not really a fix against a class of tree craziness.

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