I'm working on a closed source (for now) project that I'd like to write a wiki and ticket system about. Trac has a well-integrated wiki and bug/issue-tracking system, and has good integration with Subversion. Webfaction offers Subversion, Trac and a whole lot of programmer-friendly options in a web host. So I'm seriously thinking of using Trac for my project.
One thing concerns me though.
How secure is Trac when I remove permissions to view the sources from various Trac groups? Is there a significant chance that any closed source hosted in the linked Subversion instance would leak out through Trac?
Any of you used Trac for closed source before? What were your experiences?