Xcode console print weird error

Question

It appeared after migrating project to Swift 4.1

W0423 16:38:46.366578 1 commandlineflags.cc:1503] Ignoring RegisterValidateFunction() for flag pointer 0x1

Answer 1

I was helped to roll back to a later version. pod 'GoogleMaps', '~> 2.6.0' for example.

Answer 2

To provide an Google Maps API key helped for me.