Consider the following code:
The 3 lines after the "if 0" are fine but the other 4 give out a "Error: syntax error; expected symbol". This certainly comes from procln.c and the check that first token must be a symbol, but does not skip that when "disabled" is true. IMO we should add a "||disabled" check in both places this check happens.
I really can't see a side effect adding this, happy to discuss it thought.