[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:                    |
-------------------------------------+-------------------------------------

Comment (by RyanGlScott):

 `-XTypeInType` switches on a menagerie of extensions, including
 `-XPolyKinds`:

 {{{
 $ /opt/ghc/head/bin/ghci
 GHCi, version 8.1.20160106: http://www.haskell.org/ghc/  :? for help
 λ> :set -XTypeInType
 λ> :showi language
 base language is: Haskell2010
 with the following modifiers:
   -XDataKinds
   -XNoDatatypeContexts
   -XExtendedDefaultRules
   -XKindSignatures
   -XNoMonomorphismRestriction
   -XNondecreasingIndentation
   -XPolyKinds
   -XTypeInType
 }}}

 `-XTypeApplications` enables some others, too:

 {{{
 $ /opt/ghc/head/bin/ghci
 GHCi, version 8.1.20160106: http://www.haskell.org/ghc/  :? for help
 λ> :set -XTypeApplications
 λ> :showi language
 base language is: Haskell2010
 with the following modifiers:
   -XAllowAmbiguousTypes
   -XNoDatatypeContexts
   -XExtendedDefaultRules
   -XNoMonomorphismRestriction
   -XNondecreasingIndentation
   -XTypeApplications
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11376#comment:3>
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