[GHC] #11108: Weak references related crash

[GHC]

#11108: Weak references related crash
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        Reporter:  Saulzar           |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Runtime System    |              Version:  7.10.2
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Runtime crash     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Saulzar):

 This seems to be the culprit - putting a Weak reference inside the
 original object by way of lazy evalution and do rec.


 {{{#!hs
 makePull :: (Weak Pull -> IO Int) -> IO Pull
 makePull f = do
   rec
     foo <- Pull weak f <$> newIORef [] <*> newIORef Nothing
     weak <- mkWeakPtr foo (Just $ print "died")
   return foo
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11108#comment:1>
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