[GHC] #11999: expressing injectivity on functional dependencies gives orphan instances warnings

[GHC]

#11999: expressing injectivity on functional dependencies gives orphan instances
warnings
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        Reporter:  dredozubov        |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.10.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by dredozubov):

 This code comment was brought to my attention on IRC:
 [https://ghc.haskell.org/trac/ghc/ticket/11999 ] It mentions this issue,
 but it still feels like a broken behavior to me. I'll leave it to the
 people more knowledgeable that me to decide if that's can be considered a
 bug.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11999#comment:1>
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