"Sometimes" I have similar issue in the a C++ project by Xcode 10.2, MacOS 10.15.6. When I modify Build Settings\User-definded\Ver, and build, Console just shows Message from debugger: Error 1. This project is controlled by GitDesktop, and today I cloned it by SourceTree to another folder and tried to modify Ver, and it works once. Then I pushed it and fetched from GitDesktop, and it shows error again...Then I modified SourceTree Ver, it became showing error 1.
Temporary solution is don't modify ver in Xcode, but edit it in App Info.plist.
cclee
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