Game crashes with error "Wrong transport belt direction" after placing diagonal rails and changing to transport belt.

Steps to reproduce:
1: Load a map in the map editor
2: Select and place some rails diagonally
3: Select inserter (Because why not. They will be diagonal too)
4: Select transport belt

Game crashes when placing a cargo wagon in the map editor if the green circle doesn't hit the yellow rectangle.

Now I feel stupid. I didn't notice any difference in those base levels. Negative for input and positive for output.

"Liquid input/output handling function" seems to limit maximum liquid inputs to 2 and outputs to 3 different materials.
Raising the limits would allow modding huge factories.