From the way you describe it, it sounds like a GCC problem. Have you 
tried compiling with -O0 to see if this works?

Cheers,
   - Andreas

Craig Latta wrote:
> Hi--
> 
>      On MacOS 10.4.9 (PPC), when I build the Unix VM from the sources at
> squeakvm.org (3.9-8), and try to run Squeak3.9-final-7067, I get:
> 
> ***
> 
>      Segmentation fault
> 
>      53273604 SystemDictionary>lowSpaceWatcher
>      Bus error
> 
> ***
> 
>      When I run the same image with the pre-built PPC MacOS 3.9-8 VM on
> squeakvm.org, things are normal. When I run that image on Linux with a
> VM built from the same sources, things are normal.
> 
>      Any ideas?
> 
> 
>      thanks!
> 
> -C
>