[GHC] #3874: GHC.Exts.traceEvent segfaults

[GHC]

#3874: GHC.Exts.traceEvent segfaults
-------------------------------+--------------------------------------------
    Reporter:  cjs             |       Owner:                 
        Type:  bug             |      Status:  new            
    Priority:  normal          |   Component:  Runtime System 
     Version:  6.12.1          |    Keywords:  event, eventlog
          Os:  Linux           |    Testcase:                 
Architecture:  x86_64 (amd64)  |     Failure:  Runtime crash  
-------------------------------+--------------------------------------------
Changes (by cjs):

  * failure:  None/Unknown => Runtime crash


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3874#comment:3>
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