[GHC] #5820: defining instance in GHCi leads to duplicated instances

[GHC]

#5820: defining instance in GHCi leads to duplicated instances
---------------------------------+------------------------------------------
    Reporter:  guest             |       Owner:                  
        Type:  bug               |      Status:  new             
    Priority:  high              |   Milestone:  7.4.2           
   Component:  GHCi              |     Version:  7.4.1-rc1       
    Keywords:                    |          Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown    
  Difficulty:  Unknown           |    Testcase:                  
   Blockedby:                    |    Blocking:                  
     Related:                    |  
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Changes (by igloo):

  * priority:  normal => high
  * difficulty:  => Unknown
  * milestone:  => 7.4.2


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5820#comment:1>
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