[GHC] #15598: RebindableSyntax with RankNTypes and type class method call yields panic.

[GHC]

#15598: RebindableSyntax with RankNTypes and type class method call yields panic.
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        Reporter:  romanb            |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.4.3
      Resolution:                    |             Keywords:
                                     |  RebindableSyntax, RankNTypes
Operating System:  Linux             |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  14963             |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by romanb):

 * related:   => 14963


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15598#comment:2>
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