[GHC] #8754: :set +s always says space usage is 0 bytes

[GHC]

#8754: :set +s always says space usage is 0 bytes
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        Reporter:  George        |            Owner:
            Type:  bug           |           Status:  new
        Priority:  high          |        Milestone:
       Component:  GHCi          |          Version:  7.8.1-rc1
      Resolution:                |         Keywords:
Operating System:  MacOS X       |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown  |       Difficulty:  Unknown
       Test Case:                |       Blocked By:
        Blocking:                |  Related Tickets:
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Comment (by carter):

 i've also had this problem with my independent mac build.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8754#comment:1>
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