Use of uninitialized value in quotemeta at
/opt/spamassassin/lib/site_perl/5.8.0/Mail/SpamAssassin/EvalTests.pm line 977, <GEN35> line 688.
That's part of an eval for a whitelist_from_rcvd statement, looking at EvalTests.pm line 977 it's a part of sub _check_whitelist_rcvd()
Any chance you've got some which lack the right number of parameters (two)?