[GHC] #11719: Cannot use higher-rank kinds with type families

[GHC]

#11719: Cannot use higher-rank kinds with type families
-------------------------------------+-------------------------------------
        Reporter:  ocharles          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Compiler (Type    |              Version:  8.0.1-rc2
  checker)                           |
      Resolution:                    |             Keywords:  TypeInType
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  GHC rejects       |            Test Case:
  valid program                      |  dependent/should_compile/T11719
      Blocked By:                    |             Blocking:
 Related Tickets:  #13913            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Iceland_jack):

 It on HEAD but fails on 8.2.1 (after adding `{-# LANGUAGE TypeInType #-}`)

 {{{
 $ ghci -ignore-dot-ghci 504.hs
 GHCi, version 8.2.1: http://www.haskell.org/ghc/  :? for help
 [1 of 1] Compiling Bug              ( 504.hs, interpreted )

 504.hs:12:20: error:
     • Expected kind ‘forall k. k -> *’,
         but ‘SBool’ has kind ‘Bool -> *’
     • In the type ‘SBool’
       In the type instance declaration for ‘F2’
    |
 12 | type instance F2 = SBool
    |                    ^^^^^

 504.hs:13:20: error:
     • Expected kind ‘forall k. k -> *’,
         but ‘STuple0’ has kind ‘() -> *’
     • In the type ‘STuple0’
       In the type instance declaration for ‘F2’
    |
 13 | type instance F2 = STuple0
    |                    ^^^^^^^
 Failed, 0 modules loaded.
 Prelude>
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11719#comment:16>
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