[GHC] #4124: GHC rejects instance quotations with splices in the instance head

[GHC]

#4124: GHC rejects instance quotations with splices in the instance head
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    Reporter:  lilac             |       Owner:                           
        Type:  bug               |      Status:  new                      
    Priority:  normal            |   Component:  Template Haskell         
     Version:  6.12.1            |    Keywords:                           
          Os:  Unknown/Multiple  |    Testcase:                           
Architecture:  Unknown/Multiple  |     Failure:  GHC rejects valid program
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Comment(by lilac):

 Some quick checking indicates the error message is using invalid syntax
 too: $[t| X |] is not accepted by GHC.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4124#comment:1>
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