don't touch internals

We shouldn't be messing with the NamedRouteCollection internals.  Just
ask the object if the named route is in there.

1 files changed, 1 insertions, 1 deletions

diff --git a/actionpack/lib/action_dispatch/routing/mapper.rb b/actionpack/lib/action_dispatch/routing/mapper.rb
index f601395dca..c1134d16ad 100644
--- a/actionpack/lib/action_dispatch/routing/mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/mapper.rb
@@ -635,7 +635,7 @@ module ActionDispatch
 
         # Query if the following named route was already defined.
         def has_named_route?(name)
-          @set.named_routes.routes[name.to_sym]
+          @set.named_routes.key? name
         end
 
         private