[GHC] #5147: GHCi ignores missing instance

[GHC]

#5147: GHCi ignores missing instance
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    Reporter:  boris                  |        Owner:                             
        Type:  bug                    |       Status:  merge                      
    Priority:  normal                 |    Milestone:  7.4.1                      
   Component:  GHCi                   |      Version:  7.0.2                      
    Keywords:  linker, data families  |     Testcase:  driver/T5147               
   Blockedby:                         |   Difficulty:                             
          Os:  Unknown/Multiple       |     Blocking:                             
Architecture:  Unknown/Multiple       |      Failure:  GHC accepts invalid program
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Changes (by simonpj):

  * status:  new => merge
  * testcase:  => driver/T5147


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5147#comment:5>
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