Forum: Ruby Error in Bones plugin ann.rb: undefined method `empty?' for :desc:Symbol

A newbie to Ruby, running rake in the gem directory causes the following
error (Is it called a Stack trace? showing my Java background here). Any
help would be greatly appreciated...

rake aborted!
undefined method `empty?' for :desc:Symbol
/.rvm/gems/ruby-1.8.7-p371/gems/bones-3.8.0/lib/bones/plugins/ann.rb:25:in
`initialize_ann'
/.rvm/gems/ruby-1.8.7-p371/gems/loquacious-1.9.1/lib/loquacious/configuration.rb:318:in
`instance_eval'
/.rvm/gems/ruby-1.8.7-p371/gems/loquacious-1.9.1/lib/loquacious/configuration.rb:318:in
`initialize'
/.rvm/gems/ruby-1.8.7-p371/gems/loquacious-1.9.1/lib/loquacious/configuration.rb:304:in
`new'
/.rvm/gems/ruby-1.8.7-p371/gems/loquacious-1.9.1/lib/loquacious/configuration.rb:304:in
`evaluate'
/.rvm/gems/ruby-1.8.7-p371/gems/loquacious-1.9.1/lib/loquacious/configuration.rb:169:in
`ann'
/.rvm/gems/ruby-1.8.7-p371/gems/loquacious-1.9.1/lib/loquacious/configuration.rb:197:in
`__send__'
/.rvm/gems/ruby-1.8.7-p371/gems/loquacious-1.9.1/lib/loquacious/configuration.rb:197:in
`__send'
/.rvm/gems/ruby-1.8.7-p371/gems/loquacious-1.9.1/lib/loquacious/configuration.rb:190:in
`method_missing'
/.rvm/gems/ruby-1.8.7-p371/gems/loquacious-1.9.1/lib/loquacious/configuration.rb:199:in
`__send'
/.rvm/gems/ruby-1.8.7-p371/gems/loquacious-1.9.1/lib/loquacious/configuration.rb:336:in
`method_missing'
/.rvm/gems/ruby-1.8.7-p371/gems/bones-3.8.0/lib/bones/plugins/ann.rb:24:in
`initialize_ann'
/.rvm/gems/ruby-1.8.7-p371/gems/loquacious-1.9.1/lib/loquacious/configuration.rb:318:in
`instance_eval'
/.rvm/gems/ruby-1.8.7-p371/gems/loquacious-1.9.1/lib/loquacious/configuration.rb:318:in
`initialize'
/.rvm/gems/ruby-1.8.7-p371/gems/loquacious-1.9.1/lib/loquacious/configuration.rb:304:in
`new'
/.rvm/gems/ruby-1.8.7-p371/gems/loquacious-1.9.1/lib/loquacious/configuration.rb:304:in
`evaluate'
/.rvm/gems/ruby-1.8.7-p371/gems/loquacious-1.9.1/lib/loquacious/configuration.rb:44:in
`for'
/.rvm/gems/ruby-1.8.7-p371/gems/loquacious-1.9.1/lib/loquacious.rb:22:in
`configuration_for'
/.rvm/gems/ruby-1.8.7-p371/gems/bones-3.8.0/lib/bones.rb:73:in `config'
/.rvm/gems/ruby-1.8.7-p371/gems/bones-3.8.0/lib/bones/plugins/ann.rb:22:in
`initialize_ann'
/.rvm/gems/ruby-1.8.7-p371/gems/little-plugger-1.1.3/lib/little-plugger.rb:178:in
`send'
/.rvm/gems/ruby-1.8.7-p371/gems/little-plugger-1.1.3/lib/little-plugger.rb:178:in
`initialize_plugins'
/.rvm/gems/ruby-1.8.7-p371/gems/little-plugger-1.1.3/lib/little-plugger.rb:176:in
`each'
/.rvm/gems/ruby-1.8.7-p371/gems/little-plugger-1.1.3/lib/little-plugger.rb:176:in
`initialize_plugins'
/.rvm/gems/ruby-1.8.7-p371/gems/bones-3.8.0/lib/bones.rb:114:in `Bones'
/.rvm/gems/ruby-1.8.7-p371/gems/ci_primordial-1.3.49/lib/ci/primordial/tasks/common.rb:76:in
`ci_gem'
/ci/gems/ci_sentiment/Rakefile:5
/.rvm/gems/ruby-1.8.7-p371/bin/ruby_noexec_wrapper:14
(See full trace by running task with --trace)


Here are the list of Gems installed...

[localhost]$ bundle list
Gems included by the bundle:
  * activerecord (2.3.11)
  * activesupport (2.3.11)
  * addressable (2.2.8)
  * arrayfields (4.7.4)
  * bones (3.8.0)
  * bones-rcov (1.0.1)
  * bones-rspec (2.0.1)
  * bundler (1.2.2)
  * chronic (0.6.7)
  * composite_primary_keys (2.2.2)
  * curb (0.7.15)
  * dalli (2.0.5)
  * diff-lcs (1.1.3)
  * expiration-date (1.1.0)
  * fastercsv (1.5.4)
  * fattr (2.2.1)
  * hpricot (0.8.6)
  * htmlentities (4.2.4)
  * i18n (0.6.1)
  * json (1.7.5)
  * little-plugger (1.1.3)
  * logging (1.6.2)
  * loquacious (1.9.1)
  * mail (2.2.19)
  * main (4.6.0)
  * map (6.2.0)
  * mime-types (1.19)
  * nokogiri (1.5.5)
  * pg (0.11.0)
  * polyglot (0.3.3)
  * rake (10.0.2)
  * rcov (0.9.11)
  * rdoc (3.12)
  * rfeedfinder (0.9.13)
  * rfeedreader (1.0.17)
  * rspec (2.6.0)
  * rspec-core (2.6.4)
  * rspec-expectations (2.6.0)
  * rspec-mocks (2.6.0)
  * sequel (3.27.0)
  * simple_uuid (0.1.2)
  * treetop (1.4.12)
  * tzinfo (0.3.35)