title: Xcode 10 'xxx' has different definitions in different modules; definition in module 'xx' first difference is function body
body: <p>In Xcode 9 just an warming, update to Xcode 10 changed to error<a href="https://i.stack.imgur.com/agkBN.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/agkBN.png" alt="enter image description here"></a></p>