[GHC] #13742: Code using ConstraintKinds needs explicit kind signature with GHC 8.2.1

[GHC]

#13742: Code using ConstraintKinds needs explicit kind signature with GHC 8.2.1
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           Reporter:  albertov       |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.2.1-rc2
  (Type checker)                     |
           Keywords:                 |  Operating System:  Unknown/Multiple
  ConstraintKinds, KindSignatures    |
       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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 The attached module compiles without errors with GHC 8.0.1 but needs an
 explicit kind signature with GHC 8.2.1-rc2.

 Mentioned in this [https://mail.haskell.org/pipermail/ghc-
 devs/2017-May/014222.html ghc-dev thread].

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13742>
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