[GHC] #3956: GHC6.12.2-RC1 runtime error: Invalid object in isRetainer(): 32

[GHC]

#3956: GHC6.12.2-RC1 runtime error: Invalid object in isRetainer(): 32
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    Reporter:  jlouis                                         |        Owner:               
        Type:  bug                                            |       Status:  new          
    Priority:  highest                                        |    Milestone:  6.12.2       
   Component:  Runtime System                                 |      Version:               
    Keywords:  GHC6.12.2-RC1 Retainer Profiling isRetainer()  |   Difficulty:               
          Os:  Linux                                          |     Testcase:               
Architecture:  x86_64 (amd64)                                 |      Failure:  Runtime crash
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Comment(by jlouis):

 Also confirmed to fail with Combinatorrent v0.2.0 on hackage. Might be
 easier to work with than the github variant.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3956#comment:4>
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