Fixed #9756: the for tag no longer leaves the context stack unbalanced when...

            values = list(values)

        len_values = len(values)

        if len_values < 1:

            context.pop()

            return self.nodelist_empty.render(context)

        nodelist = NodeList()

        if self.is_reversed:

class SomeOtherException(Exception):

    pass

class ContextStackException(Exception):

    pass

class SomeClass:

    def __init__(self):

        self.otherclass = OtherClass()

                try:

                    test_template = loader.get_template(name)

                    output = self.render(test_template, vals)

                except ContextStackException:

                    failures.append("Template test (TEMPLATE_STRING_IF_INVALID='%s'): %s -- FAILED. Context stack was left imbalanced" % (invalid_str, name))

                    continue

                except Exception:

                    exc_type, exc_value, exc_tb = sys.exc_info()

                    if exc_type != result:

            ('-'*70, ("\n%s\n" % ('-'*70)).join(failures)))

    def render(self, test_template, vals):

        return test_template.render(template.Context(vals[1]))

        context = template.Context(vals[1])

        before_stack_size = len(context.dicts)

        output = test_template.render(context)

        if len(context.dicts) != before_stack_size:

            raise ContextStackException

        return output

    def get_template_tests(self):

        # SYNTAX --