[GHC] #7149: Heap profiling restricted with retainers (+RTS -hrfoo -hc) segfaults

[GHC]

#7149: Heap profiling restricted with retainers (+RTS -hrfoo -hc) segfaults
-------------------------------+--------------------------------------------
    Reporter:  akio            |       Owner:  pcapriotti   
        Type:  bug             |      Status:  patch        
    Priority:  normal          |   Milestone:  7.6.1        
   Component:  Profiling       |     Version:  7.5          
    Keywords:                  |          Os:  Linux        
Architecture:  x86_64 (amd64)  |     Failure:  Runtime crash
  Difficulty:  Unknown         |    Testcase:               
   Blockedby:                  |    Blocking:               
     Related:                  |  
-------------------------------+--------------------------------------------
Changes (by pcapriotti):

  * owner:  => pcapriotti
  * difficulty:  => Unknown
  * milestone:  => 7.6.1


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7149#comment:2>
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