[GHC] #1122: Trying to declare an infix newtype yields ghc panic

[GHC]

#1122: Trying to declare an infix newtype yields ghc panic
-------------------------+--------------------------------------------------
    Reporter:  guest     |       Owner:       
        Type:  bug       |      Status:  new  
    Priority:  normal    |   Milestone:       
   Component:  Compiler  |     Version:  6.6  
    Severity:  normal    |    Keywords:       
  Difficulty:  Unknown   |    Testcase:       
Architecture:  x86       |          Os:  Linux
-------------------------+--------------------------------------------------
The following code:

 `newtype (f <.> g) a = Compose (f (g a))`

 makes GHC output the following on the command line:

 {{{
 ghc-6.6: panic! (the 'impossible' happened)
   (GHC version 6.6 for i386-unknown-linux):
         MkIface.addAvail <.>{tv} main:Utils.Compose{d rCo}

 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/1122>
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