On Aug 13, 7:49 ¨Βν¬ Ιξτςαξσιτιοξ Ότςαξσζ®®®ΐηναιμ®γονχςοτεΊ
> x$ find lib -name \*.rb | xargs flog
> /usr/lib/ruby/gems/1.8/gems/flog-2.1.2/bin/flog:11: undefined method
> `flog_files' for #<Flog:0x7f7654880d20> (NoMethodError)
> from /usr/bin/flog:19:in `load'
> from /usr/bin/flog:19

This was a known problem in flog 2.1.2 that is fixed in the newly-
released 2.2.0.
Upgrade and try now.

--
-yossef