如何解决Foreman中的“错误文件描述符”消息？

Question

使用带有最新railsinstaller.org安装程序的Windows 7 64位计算机并且之前没有安装，当我在Git Extensions BASH终端中执行这些步骤时，我遇到了问题。

我创建了一个新应用，使用：

rails new testapp

然后我做了：

gem install foreman

它给了我：

Bad file descriptor
c:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/foreman-0.63.0/lib/foreman/
engine.rb:372:in `read_nonblock'
c:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/foreman-0.63.0/lib/foreman/
engine.rb:372:in `block (2 levels) in watch_for_output'
c:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/foreman-0.63.0/lib/foreman/
engine.rb:368:in `loop'
c:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/foreman-0.63.0/lib/foreman/
engine.rb:368:in `block in watch_for_output'
20:57:01 web.1  | exited with code 0
20:57:01 system | sending SIGKILL to all processes

我该如何开始排除故障？