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Doesn't Lua have tail call recursion built in to the language? Stack overflows shouldn't be an issue on properly written recursive functions.

Yes, it has tail call elimination (which I think I mentioned). But you can still right badly behaved recursive functions that avoid tail call elimination, and that's when you'll hit your stack overflow.

I have a few of those badly behaved recursive functions in the parser I mentioned at the end of my comment, and expected them to overflow, but they didn't hit the default limit.

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