lib/duck_puncher/registration.rb in duck_puncher-4.2.1 vs lib/duck_puncher/registration.rb in duck_puncher-4.2.2

@@ -2,10 +2,10 @@
   # @note When updating this file please update comment regarding this module in duck_puncher.rb
   module Registration
     def register(target, *mods)
       options = mods.last.is_a?(Hash) ? mods.pop : {}
       target = DuckPuncher.lookup_constant target
-      Ducks.list[target] = [] unless Ducks.list.key?(target)
+      Ducks.list[target] = Set.new [] unless Ducks.list.key?(target)
       Array(mods).each do |mod|
         duck = Duck.new target, mod, options
         Ducks.list[target] << duck
         decorators[target] = build_decorator_class(duck, *Ducks[target])
       end