[GHC] #8406: Invalid object in isRetainer() or Segfault

[GHC]

#8406: Invalid object in isRetainer() or Segfault
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        Reporter:  crockeea          |                   Owner:
            Type:  bug               |                  Status:  infoneeded
        Priority:  normal            |               Milestone:  8.0.1
       Component:  Runtime System    |                 Version:  7.8.3
      Resolution:                    |                Keywords:
Operating System:  Linux             |            Architecture:  x86_64
                                     |  (amd64)
 Type of failure:  Runtime crash     |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by pallly):

 I have the same problem, here is my code: http://hub.darcs.net/pallly/hdur

 When I run the executable with +RTS -hr, it crashes with the "Invalid
 object in isRetainer(): 8". (Maybe you'll need to press the 'o' key).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8406#comment:15>
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