What it does

Checks for for _ = #x, 1 do sequences without specifying a negative step.

Why this is bad

This loop will only run at most once, instead of going in reverse. If you truly did mean to run your loop only once, just use if #x > 0 instead.


for _ = #x, 1 do

...should be written as...

for _ = #x, 1, -1 do