[GHC] #15608: Segfault in retainer profiling

[GHC]

#15608: Segfault in retainer profiling
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        Reporter:  osa1              |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Profiling         |              Version:  8.5
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D5134
       Wiki Page:                    |
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Comment (by MikolajKonarski):

 I see that Phab:D5134 is merged, but not to 8.4 branch. Could we milestone
 this to 8.4.5 once such milestone exists? Ömer says this should be rather
 safe to merge to 8.4. Thank you!

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15608#comment:5>
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