[GHC] #13404: Derive instances for classes with associated types

[GHC]

#13404: Derive instances for classes with associated types
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        Reporter:  Iceland_jack      |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:  duplicate         |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #2721, #4083,     |  Differential Rev(s):
  #8165                              |
       Wiki Page:                    |
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Comment (by RyanGlScott):

 Replying to [comment:4 simonpj]:
 > Does the user manual explain this?

 Yes, see
 http://git.haskell.org/ghc.git/blob/ab27fdcfe26759f3e4cd7e2105e7e7e83e269e48:/docs/users_guide/glasgow_exts.rst#l4324

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13404#comment:5>
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