[GHC] #15748: panic

[GHC]

#15748: panic
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        Reporter:  awf               |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.6.1
      Resolution:  duplicate         |             Keywords:
Operating System:  Unknown/Multiple  |         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 simonpj):

 Well it's hard to tell if it's a duplicate without a way to reproduce it.
 Andrew, do you have a repro case?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15748#comment:2>
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