Psych::SyntaxError: (<unknown>): 'reader' unacceptable character '' (0x1B)

[ivanxuu]

In a jRuby rails app working fine with i18n-tasks v0.8.4, now I've upgraded to v0.8.5 I'm getting this error (full backtrace):

ivan@z11:~/Development/touristed (devel)$ i18n-tasks 
Psych::SyntaxError: (<unknown>): 'reader' unacceptable character '�' (0x1B) special characters are not allowed
in "'reader'", position 755 at line 0 column 0
                 parse at org/jruby/ext/psych/PsychParser.java:219
          parse_stream at /home/ivan/.rvm/rubies/jruby-9.0.0.0.pre1/lib/ruby/stdlib/psych.rb:370
                 parse at /home/ivan/.rvm/rubies/jruby-9.0.0.0.pre1/lib/ruby/stdlib/psych.rb:318
                  load at /home/ivan/.rvm/rubies/jruby-9.0.0.0.pre1/lib/ruby/stdlib/psych.rb:245
           file_config at /home/ivan/.rvm/gems/jruby-9.0.0.0.pre1@touristed/gems/i18n-tasks-0.8.5/lib/i18n/tasks/configuration.rb:16
               config= at /home/ivan/.rvm/gems/jruby-9.0.0.0.pre1@touristed/gems/i18n-tasks-0.8.5/lib/i18n/tasks/configuration.rb:30
            initialize at /home/ivan/.rvm/gems/jruby-9.0.0.0.pre1@touristed/gems/i18n-tasks-0.8.5/lib/i18n/tasks/base_task.rb:38
             base_task at /home/ivan/.rvm/gems/jruby-9.0.0.0.pre1@touristed/gems/i18n-tasks-0.8.5/lib/i18n/tasks/cli.rb:58
              commands at /home/ivan/.rvm/gems/jruby-9.0.0.0.pre1@touristed/gems/i18n-tasks-0.8.5/lib/i18n/tasks/cli.rb:48
      commands_summary at /home/ivan/.rvm/gems/jruby-9.0.0.0.pre1@touristed/gems/i18n-tasks-0.8.5/lib/i18n/tasks/cli.rb:136
  optparse_no_command! at /home/ivan/.rvm/gems/jruby-9.0.0.0.pre1@touristed/gems/i18n-tasks-0.8.5/lib/i18n/tasks/cli.rb:98
            initialize at /home/ivan/.rvm/rubies/jruby-9.0.0.0.pre1/lib/ruby/stdlib/optparse.rb:917
  optparse_no_command! at /home/ivan/.rvm/gems/jruby-9.0.0.0.pre1@touristed/gems/i18n-tasks-0.8.5/lib/i18n/tasks/cli.rb:92
             optparse! at /home/ivan/.rvm/gems/jruby-9.0.0.0.pre1@touristed/gems/i18n-tasks-0.8.5/lib/i18n/tasks/cli.rb:72
                parse! at /home/ivan/.rvm/gems/jruby-9.0.0.0.pre1@touristed/gems/i18n-tasks-0.8.5/lib/i18n/tasks/cli.rb:63
                   run at /home/ivan/.rvm/gems/jruby-9.0.0.0.pre1@touristed/gems/i18n-tasks-0.8.5/lib/i18n/tasks/cli.rb:38
                 start at /home/ivan/.rvm/gems/jruby-9.0.0.0.pre1@touristed/gems/i18n-tasks-0.8.5/lib/i18n/tasks/cli.rb:18
  auto_output_coloring at /home/ivan/.rvm/gems/jruby-9.0.0.0.pre1@touristed/gems/i18n-tasks-0.8.5/lib/i18n/tasks/cli.rb:199
                 start at /home/ivan/.rvm/gems/jruby-9.0.0.0.pre1@touristed/gems/i18n-tasks-0.8.5/lib/i18n/tasks/cli.rb:16
                 start at /home/ivan/.rvm/gems/jruby-9.0.0.0.pre1@touristed/gems/i18n-tasks-0.8.5/lib/i18n/tasks/cli.rb:9
                (root) at /home/ivan/.rvm/gems/jruby-9.0.0.0.pre1@touristed/gems/i18n-tasks-0.8.5/bin/i18n-tasks:13
                  load at org/jruby/RubyKernel.java:969
                (root) at /home/ivan/.rvm/gems/jruby-9.0.0.0.pre1@touristed/bin/i18n-tasks:1
                  eval at org/jruby/RubyKernel.java:990
                (root) at /home/ivan/.rvm/gems/jruby-9.0.0.0.pre1@touristed/bin/i18n-tasks:23

It works fine in MRI with v0.8.5, and also in any ruby version if using previous v0.8.4 version. So reverting to the v0.8.4 version of the gem it will work fine.

The problem appears when parsing the configuration file config/i18n-tasks.yml by i18n-tasks-0.8.5/lib/i18n/tasks/configuration.rb:16. In i18n-tasks.yml, the line which appears by default:
# - "<%= %x[bundle show vagrant].chomp %>/templates/locales/%{locale}.yml"
will be rendered in my system to:
# - \"\e[31mCould not find gem 'vagrant'.\e[0m/templates/locales/%{locale}.yml\"\n\n
which causes the problem, so I can remove that line from the i18n-tasks.yml file to make the problem dissapear.