but this makes me wonder if it's related to the source mutliplying some variable/register value by 3 in the error line:
> You will need at least 3 lines of code, with one PLEASE statement among them.
(from README)
Just searching "PLEASE" also shows increments and a comparison with a number written in hex... so it should be easy to figure out the intercal "please" halting problem instance, right? :)
Because IIRC, if you don't put enough or too much "PLEASE", the compiler won't compile.