gistfile1.txt

Mac:~/.rvm ruby-1.8.7-p174> rvm info
ruby-1.8.7-p174:

  system:
    uname:        "Darwin ryanmac.local 10.3.0 Darwin Kernel Version 10.3.0: Fri Feb 26 11:58:09 PST 2010; root:xnu-1504.3.12~1/RELEASE_I386 i386"
    shell:        "bash"
    version:      "3.2.48(1)-release"

  rvm:
    type:         "rvm is /Users/rew/.rvm/bin/rvm"
    version:      "rvm 0.1.38 by Wayne E. Seguin (wayneeseguin@gmail.com) [http://rvm.beginrescueend.com/]"

  ruby:
    interpreter:  "ruby"
    version:      "1.8.7"
    date:         "2009-06-12"
    platform:     "i686-darwin10.3.0"
    patchlevel:   "2009-06-12 patchlevel 174"
    full_version: "ruby 1.8.7 (2009-06-12 patchlevel 174) [i686-darwin10.3.0]"

  homes:
    gem:          "/Users/rew/.rvm/gems/ruby-1.8.7-p174"
    ruby:         "/Users/rew/.rvm/rubies/ruby-1.8.7-p174"

  binaries:
    ruby:         "/Users/rew/.rvm/rubies/ruby-1.8.7-p174/bin/ruby"
    irb:          "/Users/rew/.rvm/rubies/ruby-1.8.7-p174/bin/irb"
    gem:          "/Users/rew/.rvm/rubies/ruby-1.8.7-p174/bin/gem"
    rake:         "/Users/rew/.rvm/gems/ruby-1.8.7-p174/bin/rake"

  environment:
    GEM_HOME:     "/Users/rew/.rvm/gems/ruby-1.8.7-p174"
    GEM_PATH:     "/Users/rew/.rvm/gems/ruby-1.8.7-p174:/Users/rew/.rvm/gems/ruby-1.8.7-p174@global"
    BUNDLE_PATH:  "/Users/rew/.rvm/gems/ruby-1.8.7-p174"
    MY_RUBY_HOME: "/Users/rew/.rvm/rubies/ruby-1.8.7-p174"
    IRBRC:        "/Users/rew/.rvm/rubies/ruby-1.8.7-p174/.irbrc"
    RUBYOPT:      ""
    gemset:       ""

Mac:~/.rvm ruby-1.8.7-p174> rvm list

rvm rubies

   ruby-1.8.6-p399 [ x86_64 ]
=> ruby-1.8.7-p174 [ x86_64 ]
   ruby-1.9.2-head [ x86_64 ]
   ruby-head [ x86_64 ]

Mac:~/.rvm ruby-1.8.7-p174> gem outdate
ERROR:  While executing gem ... (NoMethodError)
    undefined method `first' for nil:NilClass