[GHC] #2491: ghc-pkg unregister should complain about breaking dependent packages

[GHC]

#2491: ghc-pkg unregister should complain about breaking dependent packages
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 Reporter:  duncan           |          Owner:  simonmar
     Type:  feature request  |         Status:  new     
 Priority:  normal           |      Milestone:          
Component:  Compiler         |        Version:  6.8.3   
 Severity:  normal           |     Resolution:          
 Keywords:                   |     Difficulty:  Unknown 
 Testcase:                   |   Architecture:  Unknown 
       Os:  Unknown          |  
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Changes (by simonmar):

  * owner:  => simonmar
  * difficulty:  => Unknown

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2491#comment:1>
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