[GHC] #3491: Relax superclass restrictions

[GHC]

#3491: Relax superclass restrictions
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    Reporter:  simonpj           |        Owner:                  
        Type:  bug               |       Status:  closed          
    Priority:  normal            |    Milestone:  _|_             
   Component:  Compiler          |      Version:  6.10.4          
    Severity:  minor             |   Resolution:  duplicate       
    Keywords:                    |   Difficulty:  Unknown         
    Testcase:                    |           Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |  
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Changes (by simonmar):

  * status:  new => closed
  * resolution:  => duplicate

Comment:

 ticket created twice: see #3490

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3491#comment:1>
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