[GHC] #671: GHC can suggest "Probable fixes" that are impossible

[GHC]

#671: GHC can suggest "Probable fixes" that are impossible
------------------------------+---------------------------------------------
  Reporter:  glasser at mit.edu  |          Owner:         
      Type:  bug              |         Status:  closed 
  Priority:  low              |      Milestone:         
 Component:  Compiler         |        Version:  6.4.1  
  Severity:  minor            |     Resolution:  wontfix
  Keywords:                   |             Os:  Unknown
Difficulty:  Unknown          |   Architecture:  Unknown
------------------------------+---------------------------------------------
Changes (by simonpj):

  * resolution:  => wontfix
  * status:  new => closed

Comment:

 I've changed "Probable" to "Possible" in the HEAD.  But I can't see
 another easy way to make this msg more helpful.

 It's be enough to give an instance for Num [a], for example, but I'm leery
 about trying to second-guess the programmer.  And saying "Make Num [Char]
 satisfiable" which is more correct, probably won't help.

 Simon

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/671>
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