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[Bug 20131] [MutationObservers] Unclear whether unique record instances are required in 5.3.2 "Queuing a mutation record"

From: <bugzilla@jessica.w3.org>
Date: Wed, 28 Nov 2012 22:13:51 +0000
To: public-webapps-bugzilla@w3.org
Message-ID: <bug-20131-2532-akYTQPodld@http.www.w3.org/Bugs/Public/>

--- Comment #13 from Olli Pettay <bugs@pettay.fi> ---
(In reply to comment #12)
> In your example, neither are shared between A and B. A sees |record| and B
> sees |recordWithOldValue|.
Why? Both observers should get 2 records. One record is with oldValue, one
without. But A should never see record with oldValue, just similar record which
has empty old value.

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