[GHC] #2064: problems with duplicate modules

[GHC]

#2064: problems with duplicate modules
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 Reporter:  Frederik  |          Owner:            
     Type:  bug       |         Status:  new       
 Priority:  normal    |      Milestone:  6.8 branch
Component:  Compiler  |        Version:  6.8.2     
 Severity:  normal    |     Resolution:            
 Keywords:            |     Difficulty:  Unknown   
 Testcase:            |   Architecture:  Unknown   
       Os:  Unknown   |  
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Comment (by duncan):

 Cabal >= 1.3.4 is doing this check, however it's cheap and easy to add to
 ghc-pkg.

 I think we can assume that package registration files dropped into a
 `package.conf.d` directory are correct so we need only do it when we
 register (it'd be useful to have a `ghc-pkg check --virtual-
 root=tmp_image/` command to double check this however). As I understand
 it, the plan is to use a binary cache of the info in a `package.conf.d`
 directory and this is also a suitable point to check.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2064#comment:3>
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