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Taken from lua-l mailing list archive. I alreaady found it three times
and lost it twice. Original description:
> And in that case it's not necessary to use normal text as output at all.
> So here is my try using graphviz. It should handle cycles, metatables,
> environment tables and upvalues. I used it to debug __index-cycles in a
> mixture of generated and hand-written code (was a real mess). Source is
> public domain.
>
> HF,
> Philipp
Commit author information and date preserved from the original e-mail.
lua-l: http://lua-users.org/lists/lua-l/2009-11/msg00491.html
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