[GHC] #1145: class instance lost during re-export & packaging

[GHC]

#1145: class instance lost during re-export & packaging
-------------------------------------+--------------------------------------
 Reporter:  conal                    |          Owner:         
     Type:  bug                      |         Status:  new    
 Priority:  normal                   |      Milestone:  6.6.1  
Component:  Compiler (Type checker)  |        Version:  6.6    
 Severity:  normal                   |     Resolution:         
 Keywords:                           |     Difficulty:  Unknown
 Testcase:                           |   Architecture:  Unknown
       Os:  Unknown                  |  
-------------------------------------+--------------------------------------
Changes (by igloo):

  * component:  Compiler => Compiler (Type checker)
  * milestone:  => 6.6.1

Comment:

 Confirmed with 6.6; looks like some instances are getting lost.

 It would be good to cut this down to a smaller case that we can put in the
 testsuite.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1145>
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