[GHC] #5086: internal error: update_fwd: unknown/strange object -1206004376

[GHC]

#5086: internal error: update_fwd: unknown/strange object  -1206004376
-------------------------------+--------------------------------------------
    Reporter:  danw            |       Owner:               
        Type:  bug             |      Status:  new          
    Priority:  normal          |   Component:  Compiler     
     Version:  6.12.3          |    Keywords:               
    Testcase:                  |   Blockedby:               
          Os:  Linux           |    Blocking:               
Architecture:  x86_64 (amd64)  |     Failure:  Runtime crash
-------------------------------+--------------------------------------------

Comment(by danw):

 When the heap is too small when I run the program using a single thread it
 does report that the heap is too small.  I think there might be a bug in
 the parallel garbage collector for AMD 64.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5086#comment:1>
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