[GHC] #4242: Data.Map operations can produce invalid trees

[GHC]

#4242: Data.Map operations can produce invalid trees
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    Reporter:  igloo              |        Owner:  igloo       
        Type:  bug                |       Status:  new         
    Priority:  high               |    Milestone:  6.14.1      
   Component:  libraries (other)  |      Version:  6.12.3      
    Keywords:                     |     Testcase:              
   Blockedby:                     |   Difficulty:              
          Os:  Unknown/Multiple   |     Blocking:              
Architecture:  Unknown/Multiple   |      Failure:  None/Unknown
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Changes (by igloo):

  * owner:  => igloo


-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4242#comment:2>
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