[GHC] #7730: :info and polykinds

[GHC]

#7730: :info and polykinds
--------------------------------------------+------------------------------
        Reporter:  monoidal                 |            Owner:
            Type:  bug                      |           Status:  new
        Priority:  normal                   |        Milestone:  7.8.1
       Component:  Compiler (Type checker)  |          Version:  7.6.2
      Resolution:                           |         Keywords:
Operating System:  Unknown/Multiple         |     Architecture:
 Type of failure:  None/Unknown             |  Unknown/Multiple
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:
--------------------------------------------+------------------------------

Comment (by simonpj):

 Another example
 {{{
 data T a = forall a. MkT a
 }}}
 The inner `a` shadows the outer one, so this really means:
 {{{
 data T a where
   MkT :: forall b. b -> T a
 }}}
 but it displays as
 {{{
 data T a where
   MkT :: a -> T a
 }}}
 which is desperately confusing.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7730#comment:4>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler