stale_session_check!

# File actionpack/lib/action_controller/session/abstract_store.rb, line 69
          def stale_session_check!
            yield
          rescue ArgumentError => argument_error
            if argument_error.message =~ %r{undefined class/module ([\w:]*\w)}
              begin
                # Note that the regexp does not allow $1 to end with a ':'
                $1.constantize
              rescue LoadError, NameError => const_error
                raise ActionController::SessionRestoreError, "Session contains objects whose class definition isn\\'t available.\nRemember to require the classes for all objects kept in the session.\n(Original exception: \#{const_error.message} [\#{const_error.class}])\n"
              end

              retry
            else
              raise
            end
          end