Re: [Fxruby-users] segfault with FXTreeList in Ruby 1.8.0

[Lyle J. <jl...@cf...>]

Joel VanderWerf wrote:

> If you want to take a look at the code itself, it's at:
> 
> http://PATH.Berkeley.EDU/~vjoel/tree-bug/observable-0.3-alpha.tgz
> http://PATH.Berkeley.EDU/~vjoel/tree-bug/foxtails-0.2-alpha.tgz
> 
> The buggy code is in foxtails/examples/tree.rb.

I can reproduce the bug, but so far haven't been able to track down the 
root cause. I did notice that if I quit the program using the File->Quit 
menu option instead the Ctrl+Q accelerator that I don't get the 
segfault, but the significance of this is still unclear.

At the time of the crash we can see that it's trying to call 
FXTreeItem::setFocus() on one of the tree items. I added some print 
statements to see which tree items are getting garbage-collected (and 
when) and it appears that this tree item is indeed still "alive" at this 
point, so I concur that it doesn't seem to be a GC-related problem.

I also did a quick build against the latest CVS sources for Ruby (post 
1.8.0) but this didn't change anything.

I'm sort-of shooting in the dark at the moment, but will let you know if 
I can figure it out :(