[GHC] #12133: ConstraintKinds inference failure (regression from 7.10)

[GHC]

#12133: ConstraintKinds inference failure (regression from 7.10)
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        Reporter:  goldfire          |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.0.2
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
                                     |  typecheck/should_compile/T12133
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by simonpj):

 * testcase:   => typecheck/should_compile/T12133


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12133#comment:5>
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