[GHC] #7862: Could not deduce (A) from the context (A, ...)

[GHC]

#7862: Could not deduce (A) from the context (A, ...)
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Reporter:  alang9                     |          Owner:                         
    Type:  bug                        |         Status:  new                    
Priority:  normal                     |      Component:  Compiler (Type checker)
 Version:  7.6.2                      |       Keywords:                         
      Os:  Linux                      |   Architecture:  x86_64 (amd64)         
 Failure:  GHC rejects valid program  |      Blockedby:                         
Blocking:                             |        Related:                         
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Changes (by liyang):

 * cc: hackage.haskell.org@… (added)


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7862#comment:1>
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