[GHC] #11669: Incorrectly suggests RankNTypes for ill-formed type "forall a. Eq a. Int"

[GHC]

#11669: Incorrectly suggests RankNTypes for ill-formed type "forall a. Eq a. Int"
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        Reporter:  Iceland_jack      |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.1
  (Parser)                           |
      Resolution:                    |             Keywords:  newcomer
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  warning at compile-time            |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #3155             |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by jstolarek):

 Thomie, I am a bit puzzled by your comment. I think that the signature
 `foo :: forall a. Eq a. Int` is incorrect (even with `ExplicitForAll` or
 `RankNTypes`) and should be simply rejected with a parse error. Or am I
 missing something?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11669#comment:2>
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