Please update swi-pl there are newer versions on http://www.swi-prolog.org/download/stable/src/ (last version 7.2.2) Thanks.
I compiled the newer version in the port. Compiles fine, but some problems with install, need some changes in pkg-plist (I change it and got it install) but I am not sure, if I am did it right.
Updated in commit r393880. Thanks for the reminder.
Thank you !!