[GHC] #11108: Weak references related crash

[GHC]

#11108: Weak references related crash
-------------------------------------+-------------------------------------
        Reporter:  Saulzar           |                Owner:  jme
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.2.1
       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:  #11746            |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by jme):

 * owner:   => jme
 * related:   => #11746


Comment:

 I'll give this one a shot.

 It looks like the weak pointer is ending up in an older generation than
 its key.  The key gets GCed during a minor collection, but the weak
 pointer is not "tidied" until the next major collection.  At that point,
 its pointer to the key is no longer valid.

 This appears to be the same issue as #11746.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11108#comment:7>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler