./lib/clean-hash/hash_pollute.rb in clean-hash-0.5.10 vs ./lib/clean-hash/hash_pollute.rb in clean-hash-0.5.11

@@ -12,9 +12,13 @@
         Marshal.load(Marshal.dump(self))
       end
 
       def to_ch mode=nil
         if mode.is_a?(Array)
+          if not_alowed = (keys - mode).first
+            raise ArgumentError.new('CleanHash option "%s" is not alowed (%s)' % [not_alowed, mode.join(', ')])
+          end
+
           mode.each { |el| self[el] = nil if self[el].nil? }
           ::CleanHash.create_struct self
         else
           mode ||= :indifferent
           ::CleanHash.create mode, self