luacheck

Most of the time nothing is used. The thing is that iterating is so quick, that you find the problems really fast. Although, I've been using luacheck https://github.com/mpeterv/luacheck. It is quite nice, but you have to write down the global variables by hand on the config file. Edit: Also, the vscode lua plugins have been getting quite good, and completion works to a certain extent.

Sadly, the scenario that the successor feature is intended to prevent has very much become reality in the past. The creator of Luacheck (Peter Melnichenko) passed away a couple of years ago, and ever since then the GitHub repository has been in a state of limbo. Multiple unofficial forks have come and gone, but Peter's is still the first result on Google if you search "luacheck". It isn't even possible to change the README or pin an issue to get people's attention about the primary fork; to this day people are still posting issues to the old repo. And Luacheck is "the" Lua static analysis tool that pretty much everyone uses, so it's a very significant problem. https://github.com/mpeterv/luacheck/issues/198

I would love to have something like Dialyzer to do static checks for Lua, but luacheck is a lot better than nothing: https://github.com/mpeterv/luacheck

Have you found this to be the case at all? Is it more difficult to avoid bugs when writing in Lua? Good questions. - variable name typos (undeclared vars are nil), There's a linter to catch undeclared variables. https://github.com/mpeterv/luacheck There's also some runtime checking techniques you can use. http://www.lua.org/pil/14.2.html - accidentally confusing array-style tables and hash-style tables (or vice versa), I've had that happen about as often as confusing Python dictionaries returned by different types of functions. (Which is - not often enough for me to remember the last time that happened) - tables with "holes" (nils) in them, When I'm building a vector and I want holes, I use false to fill the holes. - multiple assignment with wrong number of vals or vars (mismatch silently ignored), For me, when I'm thinking about multiple