当我在代码中添加断点时，我尝试执行po某些操作，lldb一次出现此错误，并在再次打印变量后消失。
warning: Swift error in fallback scratch context: error: failed to load module 'AppName'
note: This error message is displayed only once. If the error displayed above is due to conflicting
search paths to Clang modules in different images of the debugged executable,
this can slow down debugging of Swift code significantly,
since a fresh Swift context has to be created every time a conflict is encountered.