[GHC] #5610: Improve "Unacceptable argument type in foreign declaration" error message

[GHC]

#5610: Improve "Unacceptable argument type in foreign declaration" error message
------------------------------------------------+---------------------------
  Reporter:  bgamari                            |          Owner:                  
      Type:  feature request                    |         Status:  new             
  Priority:  high                               |      Milestone:  7.4.1           
 Component:  Compiler (Type checker)            |        Version:  7.3             
Resolution:                                     |       Keywords:                  
        Os:  Unknown/Multiple                   |   Architecture:  Unknown/Multiple
   Failure:  Incorrect warning at compile-time  |     Difficulty:  Unknown         
  Testcase:                                     |      Blockedby:                  
  Blocking:                                     |        Related:                  
------------------------------------------------+---------------------------
Changes (by bos):

 * cc: bos@… (added)
  * type:  bug => feature request
  * failure:  GHC rejects valid program => Incorrect warning at compile-
              time
  * architecture:  x86_64 (amd64) => Unknown/Multiple
  * keywords:  zlib =>
  * os:  Linux => Unknown/Multiple


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5610#comment:12>
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