[GHC] #5498: Generalized newtype deriving allows creating of instances I can't create by hand

[GHC]

#5498: Generalized newtype deriving allows creating of instances I can't create by
hand
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        Reporter:  dterei            |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:  7.6.2
       Component:  Compiler          |          Version:  7.3
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:  1496
        Blocking:                    |  Related Tickets:
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Changes (by goldfire):

 * difficulty:   => Unknown


Comment:

 See [wiki:Roles] for the concrete approach toward a solution to the seg-
 faulting problem. Roles won't fix the abstraction problem that is the main
 subject of this ticket, though.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5498#comment:8>
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