[GHC] #903: Bogus out of memory error with -H and -M

[GHC]

#903: Bogus out of memory error with -H and -M
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    Reporter:  guest           |        Owner:         
        Type:  bug             |       Status:  new    
    Priority:  normal          |    Milestone:         
   Component:  Runtime System  |      Version:  6.4.2  
    Severity:  normal          |     Keywords:         
          Os:  Unknown         |   Difficulty:  Unknown
Architecture:  Unknown         |  
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I've been noticing that -H and/or  -M sometimes lead to odd out-of-memory
 errors (which is a little disappointing because when you have a memory
 intensive program they can be helpful in tuning performance and
 footprint).

 Here's a repeatable testcase. Compile and run the attached program with
 -H1.5G and -M1.5G. It will crash with an out-of-memory error even though
 if you run it without those flags I can't really measure much memory usage
 at all (via top or time).

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/903>
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