我跑卫，它工作正常，但当我按Ctrl-C时，它给了我标准By bye ...然后输出我粘贴在下面。谁能解释一下发生了什么？似乎没有错误操作，我只想知道。
Users-MacBook-Pro:tasks user$ guard
Guard::RSpec is running, with RSpec 2!
Running all specs
No examples found.
Finished in 0.00007 seconds
0 examples, 0 failures
Bye bye...
/Library/Ruby/Gems/1.8/gems/listen-0.4.7/lib/listen/turnstile.rb:19:in `pop': Interrupt
from /Library/Ruby/Gems/1.8/gems/listen-0.4.7/lib/listen/turnstile.rb:19:in `wait'
from /Library/Ruby/Gems/1.8/gems/guard-1.2.3/lib/guard.rb:163:in `start'
from /Library/Ruby/Gems/1.8/gems/guard-1.2.3/lib/guard/cli.rb:100:in `start'
from /Library/Ruby/Gems/1.8/gems/thor-0.15.4/lib/thor/task.rb:27:in `send'
from /Library/Ruby/Gems/1.8/gems/thor-0.15.4/lib/thor/task.rb:27:in `run'
from /Library/Ruby/Gems/1.8/gems/thor-0.15.4/lib/thor/invocation.rb:120:in `invoke_task'
from /Library/Ruby/Gems/1.8/gems/thor-0.15.4/lib/thor.rb:275:in `dispatch'
from /Library/Ruby/Gems/1.8/gems/thor-0.15.4/lib/thor/base.rb:425:in `start'
from /Library/Ruby/Gems/1.8/gems/guard-1.2.3/bin/guard:6
from /usr/bin/guard:23:in `load'
from /usr/bin/guard:23
Users-MacBook-Pro:tasks user$