[GHC] #10749: Boot file instances should imply superclasses

[GHC]

#10749: Boot file instances should imply superclasses
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        Reporter:  ezyang            |                   Owner:  ezyang
            Type:  bug               |                  Status:  new
        Priority:  low               |               Milestone:
       Component:  Compiler          |                 Version:  7.11
      Resolution:                    |                Keywords:  backpack
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by goldfire):

 I vote for (1). A.hs-boot is wrong.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10749#comment:1>
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