[GHC] #9590: AMP breaks `haskell2010` package

[GHC]

#9590: AMP breaks `haskell2010` package
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        Reporter:  hvr               |                   Owner:  ekmett
            Type:  bug               |                  Status:  closed
        Priority:  high              |               Milestone:  7.10.1
       Component:  Core Libraries    |                 Version:  7.9
      Resolution:  fixed             |                Keywords:  AMP,
Operating System:  Unknown/Multiple  |  report-impact
 Type of failure:  GHC rejects       |            Architecture:
  valid program                      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:  Phab:D510
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Comment (by nomeata):

 Nice finding. But what is their scope? Do they leak to other modules like
 instance declarations? What if there are conflicts?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9590#comment:21>
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