[GHC] #5462: Deriving clause for arbitrary classes

[GHC]

#5462: Deriving clause for arbitrary classes
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        Reporter:  simonpj           |            Owner:
            Type:  feature request   |           Status:  new
        Priority:  normal            |        Milestone:  7.6.2
       Component:  Compiler          |          Version:  7.2.1
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Changes (by lerkok):

 * difficulty:   => Unknown


Comment:

 Is there any progress on this ticket? Looks like milestone was changed to
 7.6.2. I've got 7.6.3 installed, which does not seem to support such
 deriving instances. Do I need a particular flag to enable this?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5462#comment:22>
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