[GHC] #8672: :browse and roles on typefamilies

[GHC]

#8672: :browse and roles on typefamilies
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        Reporter:  monoidal                      |            Owner:
            Type:  bug                           |  goldfire
        Priority:  low                           |           Status:  new
       Component:  Compiler (Type checker)       |        Milestone:
      Resolution:                                |          Version:  7.7
Operating System:  Unknown/Multiple              |         Keywords:
 Type of failure:  Incorrect warning at          |     Architecture:
  compile-time                                   |  Unknown/Multiple
       Test Case:                                |       Difficulty:
        Blocking:                                |  Unknown
                                                 |       Blocked By:
                                                 |  Related Tickets:
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Comment (by goldfire):

 I've moved the conversation about roles on data instances to #8177, where
 it is more relevant. Please see that ticket for further information.

 Perhaps this ticket should stay open as a reminder to revisit `:browse`
 and `:info` if/when data instance role annotations are added.

 Is there a test case?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8672#comment:3>
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