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

[bugzilla-daemon at webkit.org]

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





--- Comment #2 from Darin Adler <darin at apple.com>  2013-12-09 08:30:39 PST ---
(From update of attachment 218756)
View in context: https://bugs.webkit.org/attachment.cgi?id=218756&action=review

> Source/WebCore/ChangeLog:11
> +        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.

If this fixes a bug we need a test case demonstrating the bug. If it doesn’t we should not make a code change.

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