[GHC] #5857: GHC Panic when producing GADT with Template Haskell

[GHC]

#5857: GHC Panic when producing GADT with Template Haskell
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 Reporter:  goldfire            |          Owner:                         
     Type:  bug                 |         Status:  new                    
 Priority:  normal              |      Component:  Template Haskell       
  Version:  7.4.1               |       Keywords:  Template Haskell, GADTs
       Os:  MacOS X             |   Architecture:  x86_64 (amd64)         
  Failure:  Compile-time crash  |       Testcase:                         
Blockedby:                      |       Blocking:                         
  Related:                      |  
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 I received the following GHC panic report:
 ghc: panic! (the 'impossible' happened)
   (GHC version 7.4.1 for x86_64-apple-darwin):
         nameModule n_a2kf{tv}

 I was trying to generate the declaration of a GADT using Template Haskell
 when it happened.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5857>
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