I need some help!

[Brusalk]

Hey There!

So I've written this function to be used in one of my addons. It accepts a bunch of tables, and then returns a table containing all values common to every table passed in.

Now, where I'm confused is that it's seemingly never reaching a point in execution, even though it should be.

local function tableMerge(...) 
	if select('#', ...) < 3 then error("tableMerge", "inputs") return end
	local toReturn = {}
	for i=1, select('#', ...) do
		local tab = select(i, ...)
		if type(tab) == "table" then --ignore any inputs which aren't tables
			if not toReturn[1] then
				for j,spellbar in pairs(tab) do -- do it this way so we don't actually do anything to the tables passed in
					table.insert(toReturn, spellbar)
					print("Adding " .. spellbar)
				end
			else
				for j,v in pairs(toReturn) do -- for everything that's common up to this point in iteration:
					print("Testing " .. v)
					local found = false
					for k,spellbar in pairs(tab) do -- for everything in this new table to check
						if v == spellbar then		-- if we found that the spellbar exists in this new table, say we found it
							found = true
							print("Found " .. spellbar)
						end
					end
					if not found then -- if we didn't find this element, then remove it from the common table
						print("Removing " .. toReturn[j])
						table.remove(toReturn, j)
					end
				end				
			end			
		end
	end
	return toReturn -- return everything that's common
end

function testMerge()
	return tableMerge({1,2,3,4,5,6,7}, "test", {2,4,6}, {})
end

Here's example output of what testMerge dumps:
Dump: value=testMerge()
Adding 1
Adding 2
Adding 3
Adding 4
Adding 5
Adding 6
Adding 7
Testing 1
Removing 1
Testing 3
Removing 3
Testing 5
Removing 5
Testing 7
Removing 7
Testing 2
Removing 2
Testing 6
Removing 6
[1]={
[1] = 4
}


I'm very perplexed because it's never actually finding any common elements, even though it should be (It's not removing 2,4,6 when it reaches the 3rd table)

What's even more perplexing to me is that it's never removing the 4th value, even though it should be as the last table is empty.

I've been trying to debug this for over an hour now and I can't figure out why it's behaving like it is. (setting the last table to 2 causes the output to be {2,6}



Any help you guys can give me I would be VERY appreciative!

-Brusalk