Roblox debug.setupvalue

Roblox debug.setupvalue might sound like some forbidden piece of ancient code to the average developer, and honestly, that's not too far from the truth when you look at how Roblox handles its script security these days. If you've spent any time poking around the more technical side of Luau—the specific version of Lua that Roblox uses—you've probably realized that while the language is super accessible, there are some deep, dark corners of the debug library that are mostly off-limits to your everyday game script. ...

February 10, 2026 · 7 min · Scala Colvin