[GHC] #2456: Generics compilation problem: "FATAL:Symbol _XJv_srt already defined."

[GHC]

#2456: Generics compilation problem: "FATAL:Symbol _XJv_srt already defined."
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 Reporter:  ronwalf   |          Owner:          
     Type:  bug       |         Status:  reopened
 Priority:  normal    |      Milestone:          
Component:  Compiler  |        Version:  6.9     
 Severity:  normal    |     Resolution:          
 Keywords:            |     Difficulty:  Unknown 
 Testcase:            |   Architecture:  x86     
       Os:  MacOS X   |  
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Comment (by ronwalf):

 In this case, (a) has the wrong kind (*->*), so trying that line gives:

 #WouterTest2.hs:396:39:
     Kind mis-match
     Expected kind `* -> *', but `a' has kind `*'
     In the type `Expr a'
     In the type `(Data a) => Data (Expr a)'
     In the stand-alone deriving instance for
       `(Data a) => Data (Expr a)'

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2456#comment:5>
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