Crash on layer TYPE POLYGON with LABELCACHE OFF

I built MapServer from master yesterday (Jan. 7, 2014) and today I encountered a crash when I turned off the label cache on a polygon layer.  Line layers also seem problematic, but points are fine.

Sample mapfile: https://www.dropbox.com/s/yqzqx1gqwiq8rww/labelcache.map

Backtrace: https://www.dropbox.com/s/ds6uj9yn7gp2qim/backtrace.txt