Hmm, that is unfortunate.  Maybe the best solution is to add support for
sets?  I don't think that would be super hard.

On Tue, Oct 25, 2016 at 8:52 PM, Koert Kuipers <ko...@tresata.com> wrote:

> i am trying to use encoders as a typeclass where if it fails to find an
> ExpressionEncoder it falls back to KryoEncoder.
>
> the issue seems to be that ExpressionEncoder claims a little more than it
> can handle here:
>   implicit def newProductEncoder[T <: Product : TypeTag]: Encoder[T] =
> Encoders.product[T]
>
> this "claims" to handle for example Option[Set[Int]], but it really cannot
> handle Set so it leads to a runtime exception.
>
> would it be useful to make this a little more specific? i guess the
> challenge is going to be case classes which unfortunately dont extend
> Product1, Product2, etc.
>

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