[GHC] #2467: orphan instance warnings are badly behaved

[GHC]

#2467: orphan instance warnings are badly behaved
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    Reporter:  duncan            |        Owner:                  
        Type:  bug               |       Status:  new             
    Priority:  normal            |    Milestone:  6.12 branch     
   Component:  Compiler          |      Version:  6.8.2           
    Severity:  normal            |   Resolution:                  
    Keywords:                    |   Difficulty:  Unknown         
    Testcase:                    |           Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |  
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Comment (by simonpj):

 Indeed, your code is legitimate, and that's why warnings are just
 warnings!

 More concretely, what would you like?  A special kind of warning that
 (uniquely) does not make -Werror abort the compilation?  That seems a bit
 irregular...  But perhaps you have something in mind.

 Simon

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2467#comment:8>
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