#5086: internal error: update_fwd: unknown/strange object  -1206004376
-------------------------------+--------------------------------------------
    Reporter:  danw            |        Owner:               
        Type:  bug             |       Status:  infoneeded   
    Priority:  normal          |    Milestone:  7.2.1        
   Component:  Runtime System  |      Version:  6.12.3       
    Keywords:                  |     Testcase:               
   Blockedby:                  |   Difficulty:               
          Os:  Linux           |     Blocking:               
Architecture:  x86_64 (amd64)  |      Failure:  Runtime crash
-------------------------------+--------------------------------------------

Comment(by j.waldmann):

 here's the commands I use:
 {{{
 ghc --version

 The Glorious Glasgow Haskell Compilation System, version 7.0.3

 ghc --make -threaded -rtsopts -O2 -fforce-recomp Space.hs

  time ./Space +RTS -N1 -M8G(1,[1])
 (2,[2])
 (3,[6])
 (4,[24])
 (5,[120])
 (6,[720])
 (7,[5040])
 (8,[40320])
 (9,[362880])
 (10,[3628800])
 Space: internal error: update_fwd: unknown/strange object  8
     (GHC version 7.0.3 for x86_64_unknown_linux)
     Please report this as a GHC bug:
 http://www.haskell.org/ghc/reportabug
 Aborted

 real    0m49.840s
 user    0m46.280s
 sys     0m3.500s
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5086#comment:5>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler

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