I wrote:
> Alvaro Herrera <alvherre@alvh.no-ip.org> writes:
>> Hmm, we can leave it unused in our code, but it still needs to be
>> initialized to some valid memory context anyway; otherwise hypothetical
>> code that uses it would still crash.
> I think we want that to happen, actually, because it's impossible
> to guess what such hypothetical code needs the context to be.
I guess we could have the back branches continue to create a
shared_cast_context and just not use it in core. Seems rather
expensive for a very hypothetical compatibility measure, though.
regards, tom lane
