pass the path ast down

now we don't need to add it to a hash and delete it from the hash later
just to pass it around

actionpack/lib/action_dispatch/routing/mapper.rb

@@ -134,7 +134,6 @@ def initialize(set, ast, defaults, controller, default_action, modyoule, to, for
           @defaults = formats[:defaults].merge(@defaults).merge(normalize_defaults(options))
 
           @conditions[:required_defaults] = (split_options[:required_defaults] || []).map(&:first)
-          @conditions[:parsed_path_info] = ast
           unless via == [:all]
             @conditions[:request_method] = via.map { |m| m.to_s.dasherize.upcase }
           end
@@ -1605,7 +1604,7 @@ def add_route(action, controller, options, _path, to, via, formatted, anchor, op
 
           mapping = Mapping.build(@scope, @set, ast, controller, default_action, to, via, formatted, options_constraints, options)
           app, conditions, requirements, defaults = mapping.to_route
-          @set.add_route(app, conditions, requirements, defaults, as, anchor)
+          @set.add_route(app, conditions, ast, requirements, defaults, as, anchor)
         end
 
         def root(path, options={})

actionpack/lib/action_dispatch/routing/route_set.rb

@@ -514,7 +514,7 @@ def empty?
         routes.empty?
       end
 
-      def add_route(app, conditions, requirements, defaults, name, anchor)
+      def add_route(app, conditions, path_ast, requirements, defaults, name, anchor)
         raise ArgumentError, "Invalid route name: '#{name}'" unless name.blank? || name.to_s.match(/^[_a-z]\w*$/i)
 
         if name && named_routes[name]
@@ -525,9 +525,8 @@ def add_route(app, conditions, requirements, defaults, name, anchor)
             "http://guides.rubyonrails.org/routing.html#restricting-the-routes-created"
         end
 
-        ast  = conditions.delete :parsed_path_info
         required_defaults  = conditions.delete :required_defaults
-        path = build_path(ast, requirements, anchor)
+        path = build_path(path_ast, requirements, anchor)
         conditions = build_conditions(conditions)
 
         route = @set.add_route(app, path, conditions, required_defaults, defaults, name)

actionpack/test/dispatch/mapper_test.rb

@@ -27,7 +27,7 @@ def dispatcher_class
         end
 
         def defaults
-          @my_routes.map { |x| x[3] }
+          @my_routes.map { |x| x[4] }
         end
 
         def conditions