[GHC] #4809: MonoLocalBinds and type classes cause infinite loop

[GHC]

#4809: MonoLocalBinds and type classes cause infinite loop
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    Reporter:  JeremyShaw        |       Owner:                             
        Type:  bug               |      Status:  new                        
    Priority:  normal            |   Component:  Compiler                   
     Version:  7.0.1             |    Keywords:                             
    Testcase:                    |   Blockedby:                             
          Os:  Unknown/Multiple  |    Blocking:                             
Architecture:  Unknown/Multiple  |     Failure:  Incorrect result at runtime
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Comment(by dsf):

 Does anyone have any thoughts about this bug?

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4809#comment:4>
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