Infinite loop with tricky requires (?)

[raingloom]

It could be my fault, but when I'm using Thranduil and it requires this module, the part that does... something with the path goes into an infinite loop.
Relevant code:

local current_path = ''
local current_index = 0
while debug.print ( #current_path ) ~= debug.print ( #input_path ) do
    local _, index, temp = input_path:find( '(.-)%.', current_index )
    if not index then current_path = input_path break end
    if love.filesystem.exists( current_path .. temp ) then -- Allow for . in folder names (even though this isn't currently allowed using require...)
        current_path = current_path .. temp .. '/'
        current_index = index + 1
    end
end

I've grepped the project to see if these variables are used anywhere and couldn't find anything, so I simply commented it out in my local repo.