From: KOSAKI Motohiro Date: 2011-08-20T14:19:09+09:00 Subject: [ruby-core:39028] Re: [Ruby 1.9 - Feature #5206][Open] ruby -K should warn > When ruby is run with -K it changes the default encoding of all files even when that may be incompatible with the source. �If many libraries are used -K may cause incorrect behavior. > > Now that we have the "coding:" magic comment ruby should warn if the -K flag is used and suggest that "coding:" magic comment be used instead. +1.