require 'rubygems'
require 'yajl'
require 'yajl/version'
require 'json'

puts `uname -a`
p [ :ruby, RUBY_VERSION ]
p [ :json, JSON::VERSION ]
p [ :yajl, Yajl::VERSION ]

p begin
  JSON.parse('f')
rescue
  :json_error
end
p begin
  JSON.parse('n')
rescue
  :json_error
end

p begin
  Yajl::Parser.parse('f')
rescue
  :yajl_error
end
p begin
  Yajl::Parser.parse('n')
rescue
  :yajl_error
end

Darwin sanma.local 10.7.0 Darwin Kernel Version 10.7.0: Sat Jan 29 15:17:16 PST 2011; root:xnu-1504.9.37~1/RELEASE_I386 i386
[:ruby, "1.9.2"]
[:json, "1.4.2"]
[:yajl, "0.8.2"]
:json_error
:json_error
nil
nil

Linux li162-226 #1 SMP Sun Jul 25 21:32:42 UTC 2010 i686 GNU/Linux
[:ruby, "1.8.7"]
[:json, "1.5.1"]
[:yajl, "0.8.2"]
:json_error
:json_error
nil
nil