[GHC] #14331: Overzealous free-floating kind check causes deriving clause to be rejected

[GHC]

#14331: Overzealous free-floating kind check causes deriving clause to be rejected
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        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.2.1
  checker)                           |
      Resolution:                    |             Keywords:  deriving
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by RyanGlScott):

 Replying to [comment:8 simonpj]:
 > Does that help?

 Thank you Simon, that was the careful explanation I was searching for. I
 think I'm sold on this idea now.

 > Is this essentially the same ticket as #14332?  Can we combine?

 I'm not sure. Do we know for sure that the bug described in this ticket is
 caused by a deficient treatment of quantification in `deriving` clauses?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14331#comment:9>
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