[GHC] #7328: Seemingly inappropriate "expecting one more argument" error in polykinded class

[GHC]

#7328: Seemingly inappropriate "expecting one more argument" error in polykinded
class
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 Reporter:  illissius                  |          Owner:                  
     Type:  bug                        |         Status:  new             
 Priority:  normal                     |      Component:  Compiler        
  Version:  7.6.1                      |       Keywords:                  
       Os:  Unknown/Multiple           |   Architecture:  Unknown/Multiple
  Failure:  GHC rejects valid program  |       Testcase:                  
Blockedby:                             |       Blocking:                  
  Related:                             |  
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Comment(by illissius):

 If instead of Proxy (Foo f) I write Proxy (Bar f) or Proxy f, there is no
 error.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7328#comment:1>
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