[GHC] #7936: newStdGen leaks memory when result is not used

[GHC]

#7936: newStdGen leaks memory when result is not used
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              Reporter:              |            Owner:  ekmett
  ryantrinkle                        |           Status:  upstream
                  Type:  bug         |        Milestone:  7.10.1
              Priority:  normal      |          Version:  7.6.3
             Component:              |         Keywords:
  libraries/random                   |     Architecture:  Unknown/Multiple
            Resolution:              |       Difficulty:  Unknown
      Operating System:              |       Blocked By:
  Unknown/Multiple                   |  Related Tickets:
       Type of failure:  Runtime     |
  crash                              |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by ekmett):

 The change makes sense to me.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7936#comment:6>
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