[GHC] #7856: Wrong error message for unknown Instance

[GHC]

#7856: Wrong error message for unknown Instance
------------------------------------------------+---------------------------
  Reporter:  bas                                |          Owner:                  
      Type:  feature request                    |         Status:  closed          
  Priority:  normal                             |      Milestone:  _|_             
 Component:  Compiler (Type checker)            |        Version:  7.6.3           
Resolution:  invalid                            |       Keywords:  Instance        
        Os:  Unknown/Multiple                   |   Architecture:  Unknown/Multiple
   Failure:  Incorrect warning at compile-time  |     Difficulty:  Unknown         
  Testcase:  typecheck/should_fail/T7856        |      Blockedby:                  
  Blocking:                                     |        Related:                  
------------------------------------------------+---------------------------
Changes (by simonpj):

  * testcase:  => typecheck/should_fail/T7856


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7856#comment:3>
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