这是一个错误，已通过 https://github.com/wayneeseguin/rvm/issues/2050 并于 2013-07-29 19:15:30 -0700 作为 rvm stable 1.21.15 发布

This was a bug and was handled with https://github.com/wayneeseguin/rvm/issues/2050 and was released as rvm stable 1.21.15 at 2013-07-29 19:15:30 -0700