[Webkit-unassigned] [Bug 211846] Null pointer access in DOMGuarded::guarded on 64b build

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=211846

--- Comment #1 from Yusuke Suzuki <ysuzuki at apple.com> ---
(In reply to xc.o.c.1180 at gmail.com from comment #0)
> Created attachment 399271 [details]
> patch
> 
> Should check null before jsDynamicCast.
> 
> Also, guardedObject() should just return JSCell*, this saves a branch in
> jsDynamicCast.

Could you add a test case showing the crash?

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