returns empty 404 instead of raising exception

for the catch-all route

app/controllers/pages_controller.rb

@@ -4,6 +4,6 @@ class PagesController < ApplicationController
   def show
     render action: params[:id]
   rescue ActionView::MissingTemplate
-    raise ActionController::RoutingError.new('Not Found')
+    head 404
   end
 end