[GHC] #3696: Incorrect type inferred with -fwarn-missing-signatures and a type class

[GHC]

#3696: Incorrect type inferred with -fwarn-missing-signatures and a type class
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    Reporter:  spl                      |        Owner:                                   
        Type:  bug                      |       Status:  new                              
    Priority:  normal                   |    Milestone:  6.12.2                           
   Component:  Compiler (Type checker)  |      Version:  6.10.1                           
    Keywords:                           |   Difficulty:                                   
          Os:  Unknown/Multiple         |     Testcase:                                   
Architecture:  Unknown/Multiple         |      Failure:  Incorrect warning at compile-time
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Changes (by igloo):

  * milestone:  => 6.12.2


Comment:

 This also happens in HEAD and 6.12.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3696#comment:1>
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