GHC internal error: traverse_weak_ptr_list: not WEAK

loadtest: internal error: traverse_weak_ptr_list: not WEAK
    Please report this as a bug to glasgow-haskell-bugs@xxxxxxxxxxx,
    or http://www.sourceforge.net/projects/ghc/

Has anyone seen this before? I got this after running a 1,300 socket  
connections for a while (probably x3 threads overall). Any workarounds?

        Thanks, Joel

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