[Webkit-unassigned] [Bug 103772] Teach OwnPtr and RefPtr to understand Arena'd objects

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=103772





--- Comment #9 from Maciej Stachowiak <mjs at apple.com>  2012-12-01 16:43:59 PST ---
(In reply to comment #8)
> > Anonymous objects should still have an m_node, though node() will be null:
> 
> If so, this function may crash...
> 
> RenderArena* renderArena() const { return document()->renderArena(); }
> 
> ...because this function deferences m_node:
> 
>     Document* document() const { return m_node->document(); }

What I'm saying is that (to the best of my understanding) node() is null for anonymous objects but m_node is not. node() specifically checks for isAnonymous() to achieve this. There may well also be cases where even m_node is null. I do not know enough about rendering details to say for sure.

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