[GHC] #13064: Incorrect redudant imports warning

[GHC]

#13064: Incorrect redudant imports warning
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        Reporter:  phadej            |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  error/warning at compile-time      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by rwbarton):

 > If I reverse `Data.Binary` and `Data.Binary.Orphans` imports the error
 messages stay exactly the same.

 Even in GHC 7.10.3? If so, then doesn't 7.10.3 also violate that spec?
 Then again, that spec is 8 years old and the intended behavior may have
 changed in that time. Better to check the User's Guide. (I haven't checked
 myself to see whether it has anything to say about this, but I hope so--if
 not that's also a bug.)

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13064#comment:3>
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