SyntaxError: /usr/local/lib/ruby/gems/2.1.0/gems/activesupport-1.0.0/lib/active_support/core_ext/hash/indifferent_access.rb

[ivomarino]

using require 'capistrano-notifier' (this require 'capistrano/notifier/mail' does not work at all) I get:

% bundle exec cap production deploy:notify:mail

/usr/local/lib/ruby/gems/2.1.0/gems/activesupport-1.0.0/lib/active_support/core_ext/hash/indifferent_access.rb:18: warning: else without rescue is useless
cap aborted!
SyntaxError: /usr/local/lib/ruby/gems/2.1.0/gems/activesupport-1.0.0/lib/active_support/core_ext/hash/indifferent_access.rb:15: syntax error, unexpected ':', expecting keyword_then or ',' or ';' or '\n'
      when Symbol: regular_reader(key) || regular_reader(key.to_s)
                  ^
/usr/local/lib/ruby/gems/2.1.0/gems/activesupport-1.0.0/lib/active_support/core_ext/hash/indifferent_access.rb:16: syntax error, unexpected keyword_when, expecting keyword_end
      when String: regular_reader(key) || regular_reader(key.to_sym)
          ^
/usr/local/lib/ruby/gems/2.1.0/gems/activesupport-1.0.0/lib/active_support/core_ext/hash/indifferent_access.rb:26: syntax error, unexpected keyword_end, expecting end-of-input
/usr/local/lib/ruby/gems/2.1.0/gems/activesupport-1.0.0/lib/active_support/core_ext/hash.rb:2:in `require'
/usr/local/lib/ruby/gems/2.1.0/gems/activesupport-1.0.0/lib/active_support/core_ext/hash.rb:2:in `<top (required)>'
/usr/local/lib/ruby/gems/2.1.0/gems/activesupport-1.0.0/lib/active_support/core_ext.rb:1:in `require'
/usr/local/lib/ruby/gems/2.1.0/gems/activesupport-1.0.0/lib/active_support/core_ext.rb:1:in `block in <top (required)>'
/usr/local/lib/ruby/gems/2.1.0/gems/activesupport-1.0.0/lib/active_support/core_ext.rb:1:in `each'
/usr/local/lib/ruby/gems/2.1.0/gems/activesupport-1.0.0/lib/active_support/core_ext.rb:1:in `<top (required)>'
/usr/local/lib/ruby/gems/2.1.0/gems/activesupport-1.0.0/lib/active_support.rb:26:in `require'
/usr/local/lib/ruby/gems/2.1.0/gems/activesupport-1.0.0/lib/active_support.rb:26:in `<top (required)>'
/usr/local/lib/ruby/gems/2.1.0/gems/actionpack-1.5.0/lib/action_controller.rb:27:in `require'
/usr/local/lib/ruby/gems/2.1.0/gems/actionpack-1.5.0/lib/action_controller.rb:27:in `<top (required)>'
/usr/local/lib/ruby/gems/2.1.0/gems/actionmailer-0.7.0/lib/action_mailer.rb:25:in `require'
/usr/local/lib/ruby/gems/2.1.0/gems/actionmailer-0.7.0/lib/action_mailer.rb:25:in `<top (required)>'
/usr/local/lib/ruby/gems/2.1.0/gems/capistrano-notifier-0.0.1/lib/capistrano_notifier.rb:1:in `require'
/usr/local/lib/ruby/gems/2.1.0/gems/capistrano-notifier-0.0.1/lib/capistrano_notifier.rb:1:in `<top (required)>'
/usr/local/lib/ruby/gems/2.1.0/gems/capistrano-notifier-0.0.1/lib/capistrano-notifier.rb:1:in `require'
/usr/local/lib/ruby/gems/2.1.0/gems/capistrano-notifier-0.0.1/lib/capistrano-notifier.rb:1:in `<top (required)>'
/Users/eim/Documents/webdev/development/swiss-chalet/Capfile:15:in `require'
/Users/eim/Documents/webdev/development/swiss-chalet/Capfile:15:in `<top (required)>'
/usr/local/lib/ruby/gems/2.1.0/gems/capistrano-3.2.1/lib/capistrano/application.rb:15:in `run'
/usr/local/lib/ruby/gems/2.1.0/gems/capistrano-3.2.1/bin/cap:3:in `<top (required)>'
/usr/local/bin/cap:23:in `load'
/usr/local/bin/cap:23:in `<main>'
(See full trace by running task with --trace)

% bundle
Using rake 10.3.2
Using activesupport 1.0.0
Using actionpack 1.5.0
Using actionmailer 0.7.0
Using i18n 0.6.11
Using colorize 0.7.3
Using net-ssh 2.9.1
Using net-scp 1.2.1
Using sshkit 1.5.1
Using capistrano 3.2.1
Using capistrano-composer 0.0.4
Using terminal-notifier 1.6.2
Using capistrano-nc 0.1.4
Using capistrano-notifier 0.0.1
Using capistrano-wpcli 0.0.7
Using bundler 1.7.3
Your bundle is complete!
Use `bundle show [gemname]` to see where a bundled gem is installed.

% ruby -v
ruby 2.1.3p242 (2014-09-19 revision 47630) [x86_64-darwin14.0]

% bundle show capistrano-notifier
/usr/local/lib/ruby/gems/2.1.0/gems/capistrano-notifier-0.0.1

any suggestions?
Thanks.

P.S. OSX Yosemite, brew, etc.