Merge pull request #23396 from pschambacher/pschambacher/fix_assert_generates

Duplicate assert_generates options before modifying it

actionpack/lib/action_dispatch/testing/assertions/routing.rb

@@ -86,6 +86,7 @@ def assert_generates(expected_path, options, defaults={}, extras={}, message=nil
         end
         # Load routes.rb if it hasn't been loaded.
 
+        options = options.clone
         generated_path, query_string_keys = @routes.generate_extras(options, defaults)
         found_extras = options.reject { |k, _| ! query_string_keys.include? k }