[GHC] #10931: layers-0.1 does not compile with ghc-7.10 (likely a regression from ghc-7.8)

[GHC]

#10931: layers-0.1 does not compile with ghc-7.10 (likely a regression from
ghc-7.8)
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        Reporter:  slyfox            |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  7.10.2
  checker)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
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Comment (by goldfire):

 This seems to have many of the same elements to #10009, which indeed
 cannot be merged. Are there known workarounds to #10009?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10931#comment:4>
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