Traceback (most recent call last):
  File "/usr/local/bin/jelly", line 74, in <module>
    raise SystemExit(main(code, args, end))
  File "/usr/local/lib/python3.7/site-packages/jelly/__init__.py", line 10, in main
    output(jelly_eval(code, args[:2]), end)
  File "/usr/local/lib/python3.7/site-packages/jelly/interpreter.py", line 422, in jelly_eval
    return variadic_chain(parse_code(code)[-1] if code else '', arguments)
  File "/usr/local/lib/python3.7/site-packages/jelly/interpreter.py", line 768, in parse_code
    x = chain.pop() if chain else chains.pop()
IndexError: pop from empty list