I am currently setting up capistrano in my Rails 3.2.13 app. I am getting the below error/details (including "control characters are not allowed at line 1 column 1"). I have done some searching for this but do not see anything related to me.
I am using rvm-capistrano and ruby 2.0.0-p195. I recently moved my app-required environment variables into .bashrc.
...
* 2013-06-10 15:18:32 executing `deploy:assets:update_asset_mtimes'
* executing "[ -e /home/deployer/apps/super_rad_app/shared/assets/manifest* ] && cat /home/deployer/apps/super_rad_app/shared/assets/manifest* || echo"
servers: ["107.20.249.163"]
[107.20.249.163] executing command
command finished in 6238ms
*** [deploy:update_code] rolling back
* executing "rm -rf /home/deployer/apps/super_rad_app/releases/20130610221258; true"
servers: ["107.20.249.163"]
[107.20.249.163] executing command
** [out :: 107.20.249.163] Using /home/deployer/.rvm/gems/ruby-2.0.0-p195
command finished in 6623ms
/home/nate/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/psych.rb:205:in `parse': (<unknown>): control characters are not allowed at line 1 column 1 (Psych::SyntaxError)
from /home/nate/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/psych.rb:205:in `parse_stream'
from /home/nate/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/psych.rb:153:in `parse'
from /home/nate/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/psych.rb:129:in `load'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/recipes/deploy/assets.rb:26:in `parse_manifest'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/namespaces.rb:191:in `method_missing'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/namespaces.rb:191:in `method_missing'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/recipes/deploy/assets.rb:93:in `block (3 levels) in load'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/execution.rb:138:in `instance_eval'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/execution.rb:138:in `invoke_task_directly'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/callbacks.rb:25:in `invoke_task_directly_with_callbacks'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/execution.rb:89:in `execute_task'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/execution.rb:101:in `find_and_execute_task'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/callback.rb:38:in `call'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/callbacks.rb:141:in `block in trigger'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/callbacks.rb:141:in `each'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/callbacks.rb:141:in `trigger'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/callbacks.rb:23:in `invoke_task_directly_with_callbacks'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/execution.rb:89:in `execute_task'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/execution.rb:101:in `find_and_execute_task'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/callback.rb:38:in `call'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/callbacks.rb:141:in `block in trigger'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/callbacks.rb:141:in `each'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/callbacks.rb:141:in `trigger'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/callbacks.rb:27:in `invoke_task_directly_with_callbacks'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/execution.rb:89:in `execute_task'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/namespaces.rb:191:in `method_missing'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/namespaces.rb:110:in `block in define_task'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/recipes/deploy.rb:234:in `block (3 levels) in load'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/execution.rb:56:in `transaction'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/namespaces.rb:191:in `method_missing'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/recipes/deploy.rb:233:in `block (2 levels) in load'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/execution.rb:138:in `instance_eval'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/execution.rb:138:in `invoke_task_directly'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/callbacks.rb:25:in `invoke_task_directly_with_callbacks'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/execution.rb:89:in `execute_task'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/namespaces.rb:191:in `method_missing'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/namespaces.rb:110:in `block in define_task'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/recipes/deploy.rb:201:in `block (2 levels) in load'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/execution.rb:138:in `instance_eval'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/execution.rb:138:in `invoke_task_directly'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/callbacks.rb:25:in `invoke_task_directly_with_callbacks'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/execution.rb:89:in `execute_task'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/configuration/execution.rb:101:in `find_and_execute_task'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/cli/execute.rb:46:in `block in execute_requested_actions'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/cli/execute.rb:45:in `each'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/cli/execute.rb:45:in `execute_requested_actions'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/cli/help.rb:19:in `execute_requested_actions_with_help'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/cli/execute.rb:34:in `execute!'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/lib/capistrano/cli/execute.rb:14:in `execute'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/gems/capistrano-2.15.4/bin/cap:4:in `<top (required)>'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/bin/cap:23:in `load'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/bin/cap:23:in `<main>'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/bin/ruby_noexec_wrapper:14:in `eval'
from /home/nate/.rvm/gems/ruby-2.0.0-p195/bin/ruby_noexec_wrapper:14:in `<main>'
This comes from a possible problem in your .bashrc.
Check this question for additional details: psych.rb error when deploying with Capistrano 'mapping not allowed in this context'