Thank you for pointing that out. As it happens, that's the exact conversation Chris and I had which led to this email ;).

On Wed, Oct 29, 2014 at 2:09 AM, Felipe Lessa <felipe.lessa@gmail.com> wrote:

I like the proposal. I think, though, that it needs more motivation:
"is it just to be consistent with most other Show instances?"

Personally, I think it will be nice to be able to quickly identify the
constructor of the exception. Currently one has Google for the error
message and hope for the best.

Cheers,

--
Felipe.

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