Re: Kind classes and associated closed type families

On Dec 18, 2015, at 2:03 PM, Ryan Scott wrote:

I presumed this was because :kind! didn't do any type family reduction whenever something was undecidable in general (to ensure :kind! always terminates, I suppose).

No. :kind! isn't that smart. Out of curiosity, what happens if you try again? As in, run :kind! ... twice, exactly the same both times. I seem to recall a ticket saying that worked. Regardless, this is just a plain old bug. Please post a report. Thanks! Richard