Compiler errors in Unity 2017.4.4

Error 1:
>'FragmentSetup': cannot convert from 'half4[3]' to 'float4[3]' at standard_clipped.cginc(175) (on d3d11)

Error 2:
>'FragmentSetup': cannot convert from 'min16float4[3]' to 'float4[3]' at standard_clipped.cginc(175) (on gles3)

The report points to standard_clipped.cginc at line 175 and shader compilation on d3d11 and gles3 in Unity 2017.4.4. Start by reproducing the compiler errors in those environments and inspect the types involved at that location. Done means the reported errors no longer occur on both platforms.

Written by the indexing model from the issue text.