[GHC] #7167: Make it a warning (not error) to hide an import that isn't exported

[GHC]

#7167: Make it a warning (not error) to hide an import that isn't exported
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    Reporter:  simonpj           |       Owner:  pcapriotti      
        Type:  bug               |      Status:  new             
    Priority:  highest           |   Milestone:  7.6.1           
   Component:  Compiler          |     Version:  7.4.2           
    Keywords:                    |          Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown    
  Difficulty:  Unknown           |    Testcase:                  
   Blockedby:                    |    Blocking:                  
     Related:                    |  
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Changes (by jwlato):

 * cc: jwlato@… (added)


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7167#comment:2>
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