Psych argument error when parsing YAML in Ruby after upgrading Bundler

Question

I've just upgraded to Bundler 1.1 from 1.0. All my code that works previously now breaks with the following error:

~/.gem/gems/psych-1.3.2/lib/psych.rb:203:in `parse': wrong number of arguments(2 for 1) (ArgumentError)
  from ~/.gem/gems/psych-1.3.2/lib/psych.rb:203:in `parse_stream'
  from ~/.gem/gems/psych-1.3.2/lib/psych.rb:151:in `parse'
  from ~/.gem/gems/psych-1.3.2/lib/psych.rb:127:in `load'

Is there someway to fix this? All I'm doing is calling YAML.load

Answer 1

Not really a fix but I've found I can remove psych as the YAML parser using:

YAML::ENGINE.yamler = 'syck'

Do this before calling:

YAML.load

I've opened an issue on the psych project.

UPDATE: Problem seems to be related to the version of Ruby I was using. Updating my Ruby version fixed this. See the above issue on Psych.