[GHC] #7687: ghc panic on TH and deriveJSON

[GHC]

#7687: ghc panic on TH and deriveJSON
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        Reporter:  guest               |            Owner:
            Type:  bug                 |           Status:  new
        Priority:  normal              |        Milestone:  7.8.1
       Component:  Template Haskell    |          Version:  7.4.2
      Resolution:                      |         Keywords:  TH
Operating System:  Windows             |     Architecture:  x86_64 (amd64)
 Type of failure:  Compile-time crash  |       Difficulty:  Unknown
       Test Case:                      |       Blocked By:  3658
        Blocking:                      |  Related Tickets:
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Comment (by George):

 When I try to compile the code above in Description I get


     Couldn't match expected type ‘Options’ with actual type ‘a0 -> a0’
     Probable cause: ‘id’ is applied to too few arguments
     In the first argument of ‘deriveJSON’, namely ‘id’
     In the expression: deriveJSON id ''Test

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7687#comment:5>
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