[Bug 21485] [Custom]: Consider possible candidates of element upgrade

https://www.w3.org/Bugs/Public/show_bug.cgi?id=21485

--- Comment #5 from Scott Miles <sjmiles@chromium.org> ---
> Pretty sure that's what happens in Gecko's current implementation,
> in fact.

Sorry if this is naiive, but we couldn't just throw an exception about
incompatible registrations at this point?

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Received on Monday, 1 April 2013 17:28:34 UTC