[GHC] #7137: Unnecessary -XRank2Types requirement involving type alias containing "forall" from another module

[GHC]

#7137: Unnecessary -XRank2Types requirement involving type alias containing
"forall" from another module
---------------------------------+------------------------------------------
    Reporter:  joeyadams         |       Owner:  simonpj                  
        Type:  bug               |      Status:  new                      
    Priority:  highest           |   Milestone:  7.6.1                    
   Component:  Compiler          |     Version:  7.7                      
    Keywords:                    |          Os:  Unknown/Multiple         
Architecture:  Unknown/Multiple  |     Failure:  GHC rejects valid program
  Difficulty:  Unknown           |    Testcase:                           
   Blockedby:                    |    Blocking:                           
     Related:                    |  
---------------------------------+------------------------------------------
Changes (by igloo):

  * owner:  => simonpj
  * priority:  normal => highest


Comment:

 Regression, so let's try to take a look before the release.

 Simon, is this expected?

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7137#comment:2>
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