在某些项目中会发生这种情况，但我还没有找到原因。如果我打开一个rails控制台然后将它发送到后台，它似乎继续运行但只接受我输入的第一个字符作为命令并返回NameError: undefined local variable or method 'w/e' for main:Object
例如这......
bash-3.2$ rails c
Loading development environment (Rails 4.2.0)
irb(main):001:0>
[1]+ Stopped rails c
bash-3.2$ ls
NameError: undefined local variable or method `l' for main:Object
from (irb):1
from /Users/geerm/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/console.rb:110:in `start'
from /Users/geerm/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/console.rb:9:in `start'
from /Users/geerm/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:68:in `console'
from /Users/geerm/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
from /Users/geerm/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands.rb:17:in `<top (required)>'
from /Users/geerm/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `require'
from /Users/geerm/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `block in require'
from /Users/geerm/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:240:in `load_dependency'
from /Users/geerm/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `require'
from /Users/geerm/Sites/siece/bin/rails:8:in `<top (required)>'