2 files changed, 6 insertions, 1 deletions
diff --git a/actionpack/lib/action_dispatch/routing/mapper.rb b/actionpack/lib/action_dispatch/routing/mapper.rb
index e2cf75da3a..73b4864e45 100644
--- a/actionpack/lib/action_dispatch/routing/mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/mapper.rb
@@ -1562,6 +1562,12 @@ module ActionDispatch
             options  = path
             path, to = options.find { |name, _value| name.is_a?(String) }
 
+            if path.nil?
+              ActiveSupport::Deprecation.warn 'Omitting the route path is deprecated. '\
+                'Specify the path with a String or a Symbol instead.'
+              path = ''
+            end
+
             case to
             when Symbol
               options[:action] = to
diff --git a/actionpack/lib/action_dispatch/routing/redirection.rb b/actionpack/lib/action_dispatch/routing/redirection.rb
index d6987f4d09..3265caa00b 100644
--- a/actionpack/lib/action_dispatch/routing/redirection.rb
+++ b/actionpack/lib/action_dispatch/routing/redirection.rb
@@ -22,7 +22,6 @@ module ActionDispatch
       end
 
       def serve(req)
-        req.check_path_parameters!
         uri = URI.parse(path(req.path_parameters, req))
 
         unless uri.host