This is because the inlining process isn’t foolproof, it’s string-based and quite simple.
In this case, there’s a collision with variable names after inlining: there’s a uv1 variable (as well as uv2/uv3) declared in the main function and a uv1 variable (uv2/uv3) in the col function.
To solve the problem, you can rename uv1/uv2/uv3 in the col function: