look at this error message
/Users/abc/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/json/common.rb:155:in initialize': A JSON text must at least contain two octets! (JSON::ParserError)
from /Users/abc/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/json/common.rb:155:in
new'
Under what circumstances does ruby use two version numbers?
in this case I see ruby-2.2.2 and 2.2.0