[GHC] #859: Highly misleading missing-package error message

[GHC]

#859: Highly misleading missing-package error message
-------------------------+--------------------------------------------------
    Reporter:  simonpj   |        Owner:         
        Type:  bug       |       Status:  new    
    Priority:  normal    |    Milestone:         
   Component:  Compiler  |      Version:  6.4.2  
    Severity:  normal    |     Keywords:         
          Os:  Unknown   |   Difficulty:  Unknown
Architecture:  Unknown   |  
-------------------------+--------------------------------------------------
GHC reports
 {{{
 ghc.exe: unknown package: ghc-6.5
 }}}
 But it's there all right:
 {{{
 sh-2.04$ ../utils/ghc-pkg/ghc-pkg-inplace list
 c:/darcs/fc2/driver/package.conf.inplace:
     Cabal-1.1.4, Win32-1.0, base-1.0, (ghc-6.5), haskell98-1.0,
     rts-1.0, template-haskell-1.0
 }}}
 The real problem is revealed by using -v
 {{{
 ...
 package ghc-6.5 will be ignored due to missing dependencies:
   Win32
 ...
 ghc.exe: unknown package: ghc-6.5
 }}}
 So the culprit is that Win32 isn't there, not that ghc-6.5 isn't there.
 The error message is jolly misleading.

 There's nothing ghc/win32 specific about this.  It's a bug in the package
 machinery.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/859>
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