Xcode6 beta2 不能调试extension问题

问题描述：在用Xcode6 beta2联机调试输入法时出现如下问题
Message from debugger: Terminated due to signal 9

问题分析：查看xcode6 beta2 realse note，发现xcode这版不支持extension的调试
• Debugging Share or Action app extensions does not work in this release. You will see an error
message similar to: "The app on quit unexpectedly. Message
from debugger: Terminated due to signal 9" (17303593)!

PS：重启电脑和真机都无法解决此问题，上午坏了，下午莫名好了，用了一会又坏了