Warning: Can't synchronize with the repository (Couldn't open Subversion repository /home/crystal/scm/crystal: SubversionException: ("Expected FS format between '1' and '3'; found format '4'", 160043)). Look in the Trac log for more information.

Installing Trac on FreeBSD

Kuei-Feng Li, Rui Lopes and Pav Lucistnik kindly  added Trac to the  FreeBSD ports collection.

For more information:

Having trouble using the ports ?

You may have to use some additional ports from  freshports. I found these ones useful:

Just add them to your /usr/ports tree before using the trac port mentioned above.