[GHC] #10308: GHC 7.10 does not export GHC.Event.Lifetime

[GHC]

#10308: GHC 7.10 does not export GHC.Event.Lifetime
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              Reporter:  bgamari     |             Owner:
                  Type:  bug         |            Status:  new
              Priority:  normal      |         Milestone:
             Component:  Compiler    |           Version:  7.10.1
              Keywords:              |  Operating System:  Unknown/Multiple
          Architecture:              |   Type of failure:  Other
  Unknown/Multiple                   |        Blocked By:
             Test Case:              |   Related Tickets:
              Blocking:              |
Differential Revisions:  D838        |
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 The `base` release shipped with GHC 7.10 does not export the `Lifetime`
 type, rendering many of the event manager interfaces useless.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10308>
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