Ruby on rails 使用Capistrano部署时出现psych.rb错误'；在此上下文中不允许映射'；

我正在尝试将Rails应用程序部署到CentOS 6/nginx/passenger服务器，但cap deploy:cold给了我一个错误。以下是部署输出的相关部分：

  * 2013-03-31 17:49:59 executing `deploy:assets:update_asset_mtimes'
  * executing "[ -e /home/appuser/apps/britaincares/shared/assets/manifest.yml ] && cat /home/appuser/apps/britaincares/shared/assets/manifest.yml || echo"
    servers: ["www.britaincares.co.uk"]
    [www.britaincares.co.uk] executing command
    command finished in 303ms
*** [deploy:update_code] rolling back
  * executing "rm -rf /home/appuser/apps/britaincares/releases/20130331164733; true"
    servers: ["www.britaincares.co.uk"]
    [www.britaincares.co.uk] executing command
 ** [out :: www.britaincares.co.uk] /home/appuser/.bashrc: eval: line 26: syntax error: unexpected end of file
    command finished in 932ms
/Users/chriswickett/.rvm/rubies/ruby-1.9.3-p374/lib/ruby/1.9.1/psych.rb:203:in `parse': (<unknown>): mapping values are not allowed in this context at line 1 column 28 (Psych::SyntaxError)
    from /Users/chriswickett/.rvm/rubies/ruby-1.9.3-p374/lib/ruby/1.9.1/psych.rb:203:in `parse_stream'
    from /Users/chriswickett/.rvm/rubies/ruby-1.9.3-p374/lib/ruby/1.9.1/psych.rb:151:in `parse'
    from /Users/chriswickett/.rvm/rubies/ruby-1.9.3-p374/lib/ruby/1.9.1/psych.rb:127:in `load'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/recipes/deploy/assets.rb:63:in `block (3 levels) in load'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:138:in `instance_eval'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:138:in `invoke_task_directly'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:25:in `invoke_task_directly_with_callbacks'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:89:in `execute_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:101:in `find_and_execute_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/callback.rb:38:in `call'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:141:in `block in trigger'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:141:in `each'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:141:in `trigger'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:23:in `invoke_task_directly_with_callbacks'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:89:in `execute_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:101:in `find_and_execute_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/callback.rb:38:in `call'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:141:in `block in trigger'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:141:in `each'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:141:in `trigger'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:27:in `invoke_task_directly_with_callbacks'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:89:in `execute_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/namespaces.rb:191:in `method_missing'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/namespaces.rb:110:in `block in define_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/recipes/deploy.rb:229:in `block (3 levels) in load'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:56:in `transaction'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/namespaces.rb:191:in `method_missing'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/recipes/deploy.rb:228:in `block (2 levels) in load'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:138:in `instance_eval'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:138:in `invoke_task_directly'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:25:in `invoke_task_directly_with_callbacks'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:89:in `execute_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/namespaces.rb:191:in `method_missing'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/namespaces.rb:110:in `block in define_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/recipes/deploy.rb:517:in `block (2 levels) in load'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:138:in `instance_eval'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:138:in `invoke_task_directly'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:25:in `invoke_task_directly_with_callbacks'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:89:in `execute_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:101:in `find_and_execute_task'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/cli/execute.rb:46:in `block in execute_requested_actions'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/cli/execute.rb:45:in `each'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/cli/execute.rb:45:in `execute_requested_actions'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/cli/help.rb:19:in `execute_requested_actions_with_help'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/cli/execute.rb:34:in `execute!'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/cli/execute.rb:14:in `execute'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/bin/cap:4:in `<top (required)>'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/bin/cap:19:in `load'
    from /Users/chriswickett/.rvm/gems/ruby-1.9.3-p374

*2013-03-31 17:49:59执行“部署：资产：更新资产”命令
*执行“[-e/home/appuser/apps/britaincares/shared/assets/manifest.yml]&&cat/home/appuser/apps/britaincares/shared/assets/manifest.yml|echo”
服务器：[“www.britaincares.co.uk”]
[www.britaincares.co.uk]执行命令
命令在303ms内完成
***[部署：更新\u代码]正在回滚
*执行“rm-rf/home/appuser/apps/britaincares/releases/20130331164733；真”
服务器：[“www.britaincares.co.uk”]
[www.britaincares.co.uk]执行命令
**[out:：www.britaincares.co.uk]/home/appuser/.bashrc:eval:line 26:语法错误：文件意外结束
命令在932ms内完成
/Users/chriswickett/.rvm/rubies/ruby-1.9.3-p374/lib/ruby/1.9.1/psych.rb:203:“解析”中：（）：在第1行第28列不允许映射值（psych:：SyntaxError）
from/Users/chriswickett/.rvm/rubies/ruby-1.9.3-p374/lib/ruby/1.9.1/psych.rb:203:in'parse_stream'
from/Users/chriswickett/.rvm/rubies/ruby-1.9.3-p374/lib/ruby/1.9.1/psych.rb:151:in'parse'
from/Users/chriswickett/.rvm/rubies/ruby-1.9.3-p374/lib/ruby/1.9.1/psych.rb:127:in'load'
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/recipes/deploy/assets.rb:63:“加载中的块（3级）”中
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:138:in'instance_eval'
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:138:“直接调用任务”中
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:25:在“直接调用任务”中使用“回调”
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:89:在“执行任务”中
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:101:“查找并执行任务”
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/callback.rb:38:in'call'
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:141:在“触发器中的块”中
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:141:in'each'
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:141:in'trigger'
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:23:in`invoke_task_directly__with_callbacks'
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:89:在“执行任务”中
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:101:“查找并执行任务”
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/callback.rb:38:in'call'
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:141:在“触发器中的块”中
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:141:in'each'
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:141:in'trigger'
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:27:在“直接调用任务”中使用“回调”
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:89:在“执行任务”中
来自/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/namespaces.rb:191:in'method_missing'
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/namespaces.rb:110:“定义任务中的块”
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/recipes/deploy.rb:229:in“加载中的块（3级）”中
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:56:在“事务”中
来自/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/namespaces.rb:191:in'method_missing'
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/recipes/deploy.rb:228:在“加载中的块（2个级别）”中
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:138:in'instance_eval'
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:138:“直接调用任务”中
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/callbacks.rb:25:在“直接调用任务”中使用“回调”
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/execution.rb:89:在“执行任务”中
来自/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/namespaces.rb:191:in'method_missing'
from/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capistrano-2.14.2/lib/capistrano/configuration/namespaces.rb:110:“定义任务中的块”
来自/Users/chriswickett/.rvm/gems/ruby-1.9.3-p374/gems/capist