Make sure passed routing options are not mutated by routing code. (closes #5314)

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4444 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 5 insertions, 4 deletions

diff --git a/actionpack/lib/action_controller/routing.rb b/actionpack/lib/action_controller/routing.rb
index 14921c3ac0..8638a1afb2 100644
--- a/actionpack/lib/action_controller/routing.rb
+++ b/actionpack/lib/action_controller/routing.rb
@@ -670,9 +670,10 @@ module ActionController
       # segments are passed alongside in order to distinguish between default values
       # and requirements.
       def divide_route_options(segments, options)
-        requirements = options.delete(:requirements) || {}
-        defaults     = options.delete(:defaults)     || {}
-        conditions   = options.delete(:conditions)   || {}
+        options = options.dup
+        requirements = (options.delete(:requirements) || {}).dup
+        defaults     = (options.delete(:defaults)     || {}).dup
+        conditions   = (options.delete(:conditions)   || {}).dup
 
         path_keys = segments.collect { |segment| segment.key if segment.respond_to?(:key) }.compact
         options.each do |key, value|
@@ -1088,4 +1089,4 @@ module ActionController
 
     Routes = RouteSet.new
   end
-end
\ No newline at end of file
+end