[GHC] #2538: Better error message for missing Rank2Types (or RankNTypes) flag

[GHC]

#2538: Better error message for missing Rank2Types (or RankNTypes) flag
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 Reporter:  tim                      |          Owner:  simonpj
     Type:  feature request          |         Status:  new    
 Priority:  normal                   |      Milestone:         
Component:  Compiler (Type checker)  |        Version:  6.8.2  
 Severity:  minor                    |     Resolution:         
 Keywords:                           |     Difficulty:  Unknown
 Testcase:                           |   Architecture:  Unknown
       Os:  Unknown                  |  
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Changes (by simonpj):

  * owner:  => simonpj
  * difficulty:  => Unknown

Comment:

 Good idea.  I'm fixing this.

 S

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2538#comment:1>
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