[GHC] #2595: Implement record update for existential and GADT data types

[GHC]

#2595: Implement record update for existential and GADT data types
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        Reporter:  simonpj           |            Owner:
            Type:  feature request   |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  Compiler          |          Version:  6.8.3
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:  tc244             |       Blocked By:
        Blocking:                    |  Related Tickets:
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Changes (by ezyang):

 * milestone:  6.12 branch =>


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2595#comment:9>
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