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Hans van der Meer wrote:
> Did someone find out why the bug does not seem to appear on the  
> Macintoshes I have seen tested (like Powerbook G4 by Asko Kauppi) and  
> does on some others? Just interested.

The bug causes a reference to memory which has been deallocated.
This has unpredictable effects, mostly depending on the memory
allocator provided by the OS. A crash is only one possible outcome.
Running Lua under Valgrind reliably detects the problem every time.