unable to view revison log for filter.inc on cvstrac

Viewing cvs revision history for /etc/inc/filter.inc by accessing
  http://cvstrac.pfsense.com/rlog?f=pfSense/etc/inc/filter.inc

always throws the following error.


---- error message ---
Database Error
db_exists: Database exists query failed

   SELECT filename FROM filechng WHERE filename='tmp/{$rule['if']}_router'

Reason: near "if": syntax error
-----

Accessing the changesets or revisions directly is working fine.

- Raja