Autocomplete throws error in tooltip

[charliegriefer]

Ruby Version: ruby 1.8.7 (2009-06-12 patchlevel 174) [i686-darwin10.5.0]

1. did a sudo gem install json
2. downloaded zip file from github
3. renamed unzipped folder to ti-mo.tmbundle
4. double-clicked .tmbundle file
5. restarted TextMate
6. typed "Ti.", at which point I got a tooltip with the following:

/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require': no such file to load

7. did a sudo gem update --system, which resulted in:

Updating RubyGems Updating rubygems-update Successfully installed rubygems-update-1.7.2 Updating RubyGems to 1.7.2 Installing RubyGems 1.7.2 RubyGems 1.7.2 installed

8. did a sudo gem install json again, just for good measure, which resulted in:

Building native extensions. This could take a while... Successfully installed json-1.5.1 1 gem installed

9. reloaded TextMate Bundles (rather than restarting).
10. typed Ti. and got the same error message in the tooltip.

There's a few lines of stacktrace, which I can provide if needed.

Disclaimer: I'm not a Ruby developer, so not sure if there's something blatantly obvious that I did wrong with either the gem update or install :\