Endless loop

[eiser-dk]

On line 83 in LineWrapper.js you will find this:

        while (w > this.spaceLeft) {
          w = this.wordWidth(word.slice(0, --l));
        }

I have seen this.spaceLeft with a negative value, resulting in an endless loop as w cannot be negative.
The workaround is to always define a width in options.

[devongovett]

Fixed by #309.