Getting an "Allocation size overflow" error in Firefox Dev Console

I'm not sure what your original formatting is, as you didn't use the code markdown in your question, so I can't point you to the root of the problem just by looking at it. When I copy/pasted your code into CodePen, I forgot to turn off the setting for auto-updating the preview and Chrome ran out of memory after a few seconds. However, once I regained control, I turned off the auto-update and pasted the code in.

After I applied a "Tidy JS" from the drop down I became aware of your i +=i inside the for-loop and it became pretty apparent that was your issue. I'm not sure what you intended to do with it, but essentially what was happening on the first pass was a 0 += 0 statement that essentially locked the loop into an infinite condition and never incremented. Supposing you started the for-loop condition with var i = 1 instead, you would only print indices 1, 3, and 5, which didn't seem like what you wanted to do, so I changed i +=i to i++ and it prints off the entirety of the playList, as I expect you wanted. Here's my slightly cleaned up version of your code:

var playList = ['I Did It My Way', 'Respect', 'Imagine', 'Born to Run', 'Louie Louie', 'Maybellene'];

function print(message) {
  document.write(message);
}

function printList(list) {
  var listHTML = '<ol>';
  for (var i = 0; i < list.length; i++) {
    listHTML += '<li>' + list[i] + '</li>';
  }
  listHTML += '</ol>';
  print(listHTML);
}

printList(playList);

As a side-note, I would recommend steering away from document.write() unless absolutely necessary. It's sort of bad juju in most situations. You might check out things like document.createElement() (link) and element.appendChild() (link), or other various ways to get the results you're after.

Anyway, good luck :)

Ahh! Mike, that was it! I had spent over an hour trying to figure out what was going wrong. Thanks.