3 files changed, 5 insertions, 5 deletions
diff --git a/actionpack/lib/action_dispatch/routing/mapper.rb b/actionpack/lib/action_dispatch/routing/mapper.rb
index 58c7f5330e..7e78b417fa 100644
--- a/actionpack/lib/action_dispatch/routing/mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/mapper.rb
@@ -47,7 +47,7 @@ module ActionDispatch
 
         private
           def constraint_args(constraint, request)
-            constraint.arity == 1 ? [request] : [request.symbolized_path_parameters, request]
+            constraint.arity == 1 ? [request] : [request.path_parameters, request]
           end
       end
 
diff --git a/actionpack/lib/action_dispatch/routing/redirection.rb b/actionpack/lib/action_dispatch/routing/redirection.rb
index b08e62543b..f8ed0cbe6a 100644
--- a/actionpack/lib/action_dispatch/routing/redirection.rb
+++ b/actionpack/lib/action_dispatch/routing/redirection.rb
@@ -19,13 +19,13 @@ module ActionDispatch
 
         # If any of the path parameters has an invalid encoding then
         # raise since it's likely to trigger errors further on.
-        req.symbolized_path_parameters.each do |key, value|
+        req.path_parameters.each do |key, value|
           unless value.valid_encoding?
             raise ActionController::BadRequest, "Invalid parameter: #{key} => #{value}"
           end
         end
 
-        uri = URI.parse(path(req.symbolized_path_parameters, req))
+        uri = URI.parse(path(req.path_parameters, req))
         
         unless uri.host
           if relative_path?(uri.path)
diff --git a/actionpack/lib/action_dispatch/routing/route_set.rb b/actionpack/lib/action_dispatch/routing/route_set.rb
index 8c2e821573..e82957d824 100644
--- a/actionpack/lib/action_dispatch/routing/route_set.rb
+++ b/actionpack/lib/action_dispatch/routing/route_set.rb
@@ -707,8 +707,8 @@ module ActionDispatch
               params[key] = URI.parser.unescape(value)
             end
           end
-          old_params = env[::ActionDispatch::Routing::RouteSet::PARAMETERS_KEY]
-          env[::ActionDispatch::Routing::RouteSet::PARAMETERS_KEY] = (old_params || {}).merge(params)
+          old_params = req.path_parameters
+          req.path_parameters = old_params.merge params
           dispatcher = route.app
           while dispatcher.is_a?(Mapper::Constraints) && dispatcher.matches?(env) do
             dispatcher = dispatcher.app