[GHC] #3782: Data Parallel "Impossible happened" compiler error

[GHC]

#3782: Data Parallel "Impossible happened" compiler error
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    Reporter:  guest             |       Owner:              
        Type:  bug               |      Status:  new         
    Priority:  normal            |   Component:  Compiler    
     Version:  6.12.1            |    Keywords:              
          Os:  Unknown/Multiple  |    Testcase:              
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown
---------------------------------+------------------------------------------
 When I attempted to compile my vectorized code , I got the following
 message:

 ghc -c -Odph -fcpr-off -fdph-seq newprop.hs
 ghc: panic! (the 'impossible' happened)
   (GHC version 6.12.1 for i386-apple-darwin):
         sumTyCon 11

 Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3782>
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