[GHC] #9721: RecordWildCards panic

[GHC]

#9721: RecordWildCards panic
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              Reporter:  jorgemendes         |            Owner:
                  Type:  bug                 |           Status:  new
              Priority:  normal              |        Milestone:
             Component:  Compiler            |          Version:  7.4.1
            Resolution:                      |         Keywords:
      Operating System:  Linux               |     Architecture:  x86
       Type of failure:  Compile-time crash  |       Difficulty:  Unknown
             Test Case:                      |       Blocked By:
              Blocking:                      |  Related Tickets:
Differential Revisions:                      |
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Comment (by Yuras):

 Looks similar to #5892

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9721#comment:1>
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