LoadC was renamed to LoadUS a long time ago. Are you sure your bsd-port
copy is updated?
For example here's what hg log reports in my hotspot dir:
[hotspot]$ hg log |more
user: Stephen Bannasch <step...@gmail.com>
date: Fri Jul 16 02:07:50 2010 -0400
summary: 6912064: type profiles need to be exploited more for dynamic language support