[GHC] #4040: Eq instance for Data.Data.DataType

[GHC]

#4040: Eq instance for Data.Data.DataType
---------------------------------+------------------------------------------
    Reporter:  Eelis-            |       Owner:                
        Type:  feature request   |      Status:  new           
    Priority:  normal            |   Component:  libraries/base
     Version:  6.12.2            |    Keywords:  syb           
          Os:  Unknown/Multiple  |    Testcase:                
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown  
---------------------------------+------------------------------------------
 The DataType data type in Data.Data currently does not derive an Eq
 instance, even though the types of both of its fields ''do'' have Eq
 instances.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4040>
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