[GHC] #7779: building GHC overwrites the installed package database if GHC_PACKAGE_PATH is set

[GHC]

#7779: building GHC overwrites the installed package database if GHC_PACKAGE_PATH
is set
---------------------------------+------------------------------------------
    Reporter:  heatsink          |       Owner:  igloo           
        Type:  bug               |      Status:  new             
    Priority:  normal            |   Milestone:  7.8.1           
   Component:  Build System      |     Version:  7.4.2           
    Keywords:                    |          Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown    
  Difficulty:  Unknown           |    Testcase:                  
   Blockedby:                    |    Blocking:                  
     Related:                    |  
---------------------------------+------------------------------------------

Comment(by igloo):

 Hmm, having thought about it, isn't that exactly what you'd expect to
 happen?

 I wonder if we should just deprecate/remove `GHC_PACKAGE_PATH`. You
 already can't use `cabal` if it's set (cabal will just fail).

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7779#comment:2>
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