Or write an infinitely long source code. This is technically---and I stress only technically---possible in not all but many languages, where an infinitely sized

Or write an infinitely long source code. This is technically---and I stress only technically---possible in not all but many languages, where an infinitely sized code is not explicitly disallowed. C is a surprisingly rare counterexample, which even doesn't allow for an infinitely sized memory anyway (because the pointer should be finitely sized).