[syslog-ng] Passing args to blocks gives error in v.3.4.1

After an upgrade from 3.3.7 to 3.4.1: ... block root mylogs(log()) { }; mylogs(log(123)) ... Gives: Unknown argument; context='root block mylogs', arg='log', value='123' Error parsing config, syntax error, unexpected LL_ERROR, expecting $end in /etc/syslog-ng/syslog-ng.conf at line 11, column 1: mylogs(log(123)) ^^^^^^ Am I doing anything wrong? -- Best regards, Koldaev Anton