2 files changed, 2 insertions, 3 deletions
diff --git a/actionpack/lib/action_dispatch/middleware/show_exceptions.rb b/actionpack/lib/action_dispatch/middleware/show_exceptions.rb
index dbe3206808..b1adf3d2d1 100644
--- a/actionpack/lib/action_dispatch/middleware/show_exceptions.rb
+++ b/actionpack/lib/action_dispatch/middleware/show_exceptions.rb
@@ -50,7 +50,7 @@ module ActionDispatch
         # Only this middleware cares about RoutingError. So, let's just raise
         # it here.
         if headers['X-Cascade'] == 'pass'
-           raise ActionController::RoutingError, "No route matches #{env['PATH_INFO'].inspect}"
+           raise ActionController::RoutingError, "No route matches [#{env['REQUEST_METHOD']}] #{env['PATH_INFO'].inspect}"
         end
       rescue Exception => exception
         raise exception if env['action_dispatch.show_exceptions'] == false
diff --git a/actionpack/lib/action_dispatch/routing/route_set.rb b/actionpack/lib/action_dispatch/routing/route_set.rb
index b28f6c2297..1d09091dc7 100644
--- a/actionpack/lib/action_dispatch/routing/route_set.rb
+++ b/actionpack/lib/action_dispatch/routing/route_set.rb
@@ -275,8 +275,7 @@ module ActionDispatch
       module MountedHelpers
       end
 
-      def mounted_helpers(name = :main_app)
-        define_mounted_helper(name) if name
+      def mounted_helpers
         MountedHelpers
       end