[GHC] #2955: Data in $HOME/.ghc is not validated leading to obscure error messages when using ghc

[GHC]

#2955: Data in $HOME/.ghc is not validated leading to obscure error messages when
using ghc
-------------------+--------------------------------------------------------
Reporter:  erikd   |          Owner:                  
    Type:  bug     |         Status:  new             
Priority:  normal  |      Component:  Compiler        
 Version:  6.8.2   |       Severity:  normal          
Keywords:          |       Testcase:                  
      Os:  Linux   |   Architecture:  Unknown/Multiple
-------------------+--------------------------------------------------------
 I installed cabal-install-0.6.0 from source, used ghc for a couple of days
 and then deleted the $HOME/.cabal directory.

 A couple of days later a whole bunch of stuff was failing to compile with
 ghc. With a bit of help from the #haskell IRC channel, I tracked this down
 to the file $HOME/.ghc/i386-linux-6.8.2/package.conf which pointed to the
 recently deleted $HOME/.cabal directory.

 The fix would be to validate all data in $HOME/.ghc and if needed provide
 a decent error message.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2955>
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