Halt and catch fire: Difference between revisions

Tricks could be used to shorten this, particularly in thefrom interactive REPL, where <code>-_</code> would be enough (i.e., attempt to perform arithmetic on a nil global), or from a file <code>_()</code> would be enough (i.e., attempt to call a nil global). This instead focuses on the "be useful elsewhere" aspect of the task, because both seem short-enough as-is: