[Webkit-unassigned] [Bug 206106] Null Ptr Deref READ @ WebCore::RenderMultiColumnFlow::lastMultiColumnSet const

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=206106

--- Comment #4 from Jack <shihchieh_lee at apple.com> ---
After discussing with Geoff, Alan and Antti, it was determined that the best approach is to check null multicolumn container (parent) and just exit the column processing functions.

Doing so help expedite destroy process. If later other functions also try to refer container in destroy process, we should exit the function immediately.

Ideally we should avoid moving children altogether, but that will require some refactoring, so we put null check for now.

(In reply to Jack from comment #3)
> After discussing with Geoff

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