Re: [Fxruby-users] FXTreeList: Core dump when exiting

[Lyle J. <ly...@kn...>]

On Jan 25, 2004, at 11:20 AM, Joel VanderWerf wrote:

> Try upgrading to a more recent ruby snapshot:

<snip>

If this happens to work properly under Ruby 1.9, I'm afraid it's by 
coincidence only. I understand the fundamental problem underlying this 
bug (the "tree list crashes when Ruby shuts down" bug) and just haven't 
hit on the proper solution yet. In short, the problem is that when the 
Ruby interpreter shuts down, the remaining objects are 
garbage-collected in an unpredictable order. That can cause parts of 
the tree list widget (specifically, some of the tree items) to be 
destroyed before they would be under normal circumstances, and it's not 
always obvious how to account for that.

I haven't tried out the CVS for Ruby 1.9 yet, and I will of course take 
your word for it that it doesn't crash there -- but I think that's just 
good luck that may turn on us again in the future ;) I'm going to focus 
some more attention on this problem (which is larger than the specific 
tree list problem alone) and try to come up with a good solution before 
the next FXRuby release.