[GHC] #4309: Painfully large errors with silly GADT instances

[GHC]

#4309: Painfully large errors with silly GADT instances
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    Reporter:  pumpkin           |        Owner:              
        Type:  bug               |       Status:  new         
    Priority:  normal            |    Milestone:              
   Component:  Compiler          |      Version:  6.12.3      
    Keywords:                    |     Testcase:              
   Blockedby:                    |   Difficulty:              
          Os:  Unknown/Multiple  |     Blocking:              
Architecture:  Unknown/Multiple  |      Failure:  None/Unknown
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Comment(by pumpkin):

 It seems reasonable to me to just say "we couldn't figure out an
 automatically derived instance for Ord, so you'll have to write your own,
 sorry!"

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4309#comment:2>
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