Re: sometimes using spawn passed pointer is nil

[Araq]

    proc getGlobalSelectorAddr*(): ptr Selector[Data] =
      var sel = getGlobalSelector()
      
      result = sel.addr
    

I doubt this can work. It's not only unsafe code, it's probably wrong code, you 
circumvent the type checker to break the "isolated heaps" rule. No wonder it 
crashes.