$ tail foo.log
[DEBUG] 2008/02/06 10:45:00 main::check_something 666463.pl:23:- something:'hello'
[DEBUG] 2008/02/06 10:45:00 main::check_something 666463.pl:23:- something:''
[ERROR] 2008/02/06 10:45:00 main::check_something 666463.pl:24:- something is nothing!