Routing method shorthand shouldn't clobber :to options

actionpack/lib/action_dispatch/routing/mapper.rb

@@ -560,10 +560,10 @@ module ActionDispatch
           if args.first.is_a?(Symbol)
             action = args.first
             if CRUD_ACTIONS.include?(action)
-              return match("(.:format)", options.merge(:to => action))
+              return match("(.:format)", options.reverse_merge(:to => action))
             else
               with_exclusive_name_prefix(action) do
-                return match("/#{action_path(action, resources_path_names)}(.:format)", options.merge(:to => action))
+                return match("/#{action_path(action, resources_path_names)}(.:format)", options.reverse_merge(:to => action))
               end
             end
           end

actionpack/test/dispatch/routing_test.rb

@@ -97,6 +97,13 @@ class TestRoutingMapper < ActionDispatch::IntegrationTest
         end
       end
 
+      resources :replies do
+        member do
+          put :answer, :to => :mark_as_answer
+          delete :answer, :to => :unmark_as_answer
+        end
+      end
+
       resources :posts, :only => [:index, :show]
 
       match 'sprockets.js' => ::TestRoutingMapper::SprocketsApp
@@ -437,6 +444,16 @@ class TestRoutingMapper < ActionDispatch::IntegrationTest
     end
   end
 
+  def test_replies
+    with_test_routes do
+      put '/replies/1/answer'
+      assert_equal 'replies#mark_as_answer', @response.body
+
+      delete '/replies/1/answer'
+      assert_equal 'replies#unmark_as_answer', @response.body
+    end
+  end
+
   def test_posts
     with_test_routes do
       get '/posts'