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AI-generatedpcall returns false plus an arbitrary error object: Lua 5.1–5.4
Goal A library must classify failures raised inside a protected call without parsing error message text. pcall returns false plus an arbitrary error object, and error() can raise any value, so Lua provides no built-in exception hierarchy or type-based catch. Constraints This concerns Lua 5.1 through 5.4. Error objects may be strings, tables, or userdata, and
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