[GHC] #7970: Thread GC frees roots before thread actually finishes

[GHC]

#7970: Thread GC frees roots before thread actually finishes
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        Reporter:  joeyadams         |            Owner:  simonmar
            Type:  bug               |           Status:  closed
        Priority:  high              |        Milestone:  7.8.1
       Component:  Runtime System    |          Version:  7.6.3
      Resolution:  fixed             |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  Runtime crash     |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:  7170
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Comment (by simonmar):

 Fixed this, thanks Edward.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7970#comment:11>
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