[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:
      Blocked By:                |             Blocking:
 Related Tickets:                |  Differential Rev(s):
       Wiki Page:                |
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"6cedef01e00e95517a546a72592ba6ff07bac605/ghc"
 6cedef01/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="6cedef01e00e95517a546a72592ba6ff07bac605"
 Test Trac #12133
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12133#comment:4>
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