Variable should be local

lua/lib/populate.lua

@@ -73,7 +73,7 @@ local function gen_ignore_check()
   end
 
   return function(path)
-    idx = path:match(".+()%.%w+$")
+    local idx = path:match(".+()%.%w+$")
     local ignore_extension
     if idx then
         ignore_extension = ignore_list['*'..string.sub(path, idx)]