It's a bug. If you add 'div' to your Allowed list, you will have the desired effect.
It has been fixed in:
commit 0680832d41d4d5377ea3ea8d8c10fd574d2deb7e Author: Edward Z. Yang Date: Tue May 21 17:19:59 2013 -0700 Use info_parent_def to get parent information, since it may not be present in info array. Signed-off-by: Edward Z. Yang