X-code7 Beta error:warning:Is a directory

I don't know if this perverted question is the only thing I've met, use X-code7 Beta to report this nonsense error error:warning:Is a directory. You're not looking for the wrong reason.

I've seen the IT geek know a classic: Have you tried rebooting? Similarly, here you clean up, don't ask me how clean, I will not tell you product---Clean or COMMAND + SHIFT + K. Of course you clean will not make it, but Xcode will tell you the reason for the mistake, at least a readable error .

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X-code7 Beta error:warning:Is a directory