[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:  7.10.1
             Component:  Runtime     |          Version:  7.6.3
  System                             |         Keywords:
            Resolution:              |     Architecture:  x86_64 (amd64)
      Operating System:  Linux       |       Difficulty:  Unknown
       Type of failure:  Runtime     |       Blocked By:
  crash                              |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by crockeea):

 I won't be able to come up with an testcase anymore. My guess is that
 there was (is?) a problem with -hr and multithreading, but I no longer
 have the code and the problem does not occur in 7.8.3 with a simple
 single-threaded example.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8406#comment:9>
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