--- a/markdown.lua	Sat Nov 01 23:34:21 2014 +0000
+++ b/markdown.lua	Sun May 07 20:02:53 2017 +0100
@@ -186,7 +186,7 @@
 		local match = {s:find(p, index)}
 		if #match>0 and (#res==0 or match[1] < res[1]) then res = match end
 	end
-	return unpack(res)
+	return table.unpack(res)
 end
 
 -- If a replacement array is specified, the range [start, stop] in the array is replaced