Kind classes and associated closed type families

[Richard Eisenberg]

On Dec 18, 2015, at 2:03 PM, Ryan Scott <ryan.gl.scott at gmail.com> 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