Describe the bug
If you use a goto command in a rule with variations (e.g. horizontal, or even something as simple as a block pushing rule) then when running the game the app wi

Reproduction Steps

1. Add section S1 in your levels
2. Add rule horizontal [ > Player | Crate ] -> [ > Player | > Crate ] goto S1
3. Attempt to run the game.

What did you expect would happen?
The game should compile. (If not possible: throw a proper error message)

OS & Browser version, desktop/mobile
Windows 10, Firefox

Screenshots, example projects, other relevant issues, etc.
Originally reported here: https://groups.google.com/g/puzzlescript/c/jq-GNn-6-R4