index_by.rb in rubocop-rails-2.17.3

- old
+ new

@@ -44,10 +44,10 @@
             :to_h)
         PATTERN
 
         def_node_matcher :on_bad_hash_brackets_map, <<~PATTERN
           (send
-            (const _ :Hash)
+            (const {nil? cbase} :Hash)
             :[]
             (block
               (call _ {:map :collect})
               (args (arg $_el))
               (array $_ (lvar _el))))