invalid subscript 'uv2'

I use the official website to download the built-in shaders [Standard] (Unity2018 beta)
When Unity starts compiling
throw the exception


3378994--265146--upload_2018-2-3_16-18-14.png

in 2017.2.0 it work fine

I’ve got the same error too. It’s about new shaders but I don’t know why.