Traceback (innermost last):

Module ZPublisher.Publish, line 92, in publish
090 |            transactions_manager.begin()
091 |
092>|        object=request.traverse(path, validated_hook=validated_hook)
093 |
094 |        if transactions_manager:

Module ZPublisher.BaseRequest, line 446, in traverse
444 |                        user=old_validation(groups, request, auth, roles)
445 |                    elif roles is UNSPECIFIED_ROLES: user=v(request, auth)
446>|                    else: user=v(request, auth, roles)
447 |
448 |            if user is None and roles != UNSPECIFIED_ROLES:

Module AccessControl.User, line 665, in validate
663 |            # wasn't the emergency user.  We need to authorize the user
664 |            # against the published object.
665>|            if self.authorize(user, a, c, n, v, roles):
666 |                return user.__of__(self)
667 |            # That didn't work.  Try to authorize the anonymous user.

Module AccessControl.User, line 604, in authorize
602 |                else:
603 |                    if security.validate(accessed, container, name, value,
604>|                                         roles):
605 |                        return 1
606 |            except:

Module Products.VerboseSecurity.VerboseSecurityPolicy, line 162, in validate
160 |        # Short-circuit tests if we can:
161 |        try:
162>|            if roles is None or 'Anonymous' in roles:
163 |                return 1
164 |        except TypeError:
TypeError: iterable argument required