[GHC] #11376: Inconsistent specified type variables among functions and datatypes/classes when using -XTypeApplications

[GHC]

#11376: Inconsistent specified type variables among functions and datatypes/classes
when using -XTypeApplications
-------------------------------------+-------------------------------------
        Reporter:  RyanGlScott       |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.1
  checker)                           |
      Resolution:                    |             Keywords:  TypeInType
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Other             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by RyanGlScott):

 This ''might'' also affect data families too, but maybe not, since you
 have to specify the kind in the data family declaration:

 {{{
 $ /opt/ghc/head/bin/ghci
 GHCi, version 8.1.20160106: http://www.haskell.org/ghc/  :? for help
 λ> :set -fprint-explicit-kinds -XTypeInType -XTypeApplications
 -XTypeFamilies
 λ> data family Fam (a :: k)
 λ> data instance Fam a = FamCon
 λ> famCon :: Fam a; famCon = FamCon
 λ> :t famCon
 famCon :: forall k (a :: k). Fam k a
 λ> :t famCon @Int
 famCon @Int :: Fam * Int
 λ> :t FamCon
 FamCon :: forall k (a :: k). Fam k a
 λ> :t FamCon @Int
 FamCon @Int :: Fam Int a
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11376#comment:1>
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