fix

Author: sumneko

src/parser/guide.lua

@@ -706,12 +706,13 @@ function m.eachSource(ast, callback)
             if not obj then
                 break
             end
-            index = index + 1
             if not mark[obj] then
+                index = index + 1
                 mark[obj] = true
                 addChilds(cache, obj)
             else
-                cache[index] = false
+                cache[index] = cache[#cache]
+                cache[#cache] = nil
             end
         end
     end