Ensure details are frozen after @details_keys lookup. The implementation waits to freeze until the last required moment, to avoid duping hashes.

1 files changed, 1 insertions, 10 deletions

diff --git a/actionpack/lib/action_view/render/rendering.rb b/actionpack/lib/action_view/render/rendering.rb
index a8f745afd1..492326964a 100644
--- a/actionpack/lib/action_view/render/rendering.rb
+++ b/actionpack/lib/action_view/render/rendering.rb
@@ -21,7 +21,7 @@ module ActionView
           _render_partial(options)
         else
           template = _determine_template(options)
-          _freeze_formats(template.formats)
+          lookup_context.freeze_formats(template.formats, true)
           _render_template(template, options[:layout], options)
         end
       when :update
@@ -62,14 +62,5 @@ module ActionView
         content
       end
     end
-
-    # Freeze the current formats in the lookup context. By freezing them, you are guaranteeing
-    # that next template lookups are not going to modify the formats. The controller can also
-    # use this, to ensure that formats won't be further modified (as it does in respond_to blocks).
-    def _freeze_formats(formats) #:nodoc:
-      return if self.formats.frozen?
-      self.formats = formats
-      self.formats.freeze
-    end
   end
 end