How to reproduce:
1. Create a new Unity project
2. Create any GameObject that uses a Standard Shader (a Cube, for example)
3. Check the Console window

Expected result: no errors are displayed in the Console window
Actual result: 'Metal: Error creating pipeline state (Standard): Link failed: The type of fragment input user(TEXCOORD0) does not match the type of the corresponding vertex shader output' is displayed in the Console window

Reproducible with: 2019.1.0a2, 2018.3.0b5, 2018.3.0b6, 2018.3.0b7
Not reproducible with: 2018.2.9f1, 2018.3.0b3, 2019.1.0a1

Notes:
Not reproducible on Windows 10