Inherit RangedPtr's operator= in all of SpiderMonkey's *CharsZ classes, so that assignment of the correct raw pointer to each will compile.  No bug, r=terrence over IRC
Bug 507998 - Add line/column information to the errors reported by JSON.parse, pointing out exactly where in the input string the first bad character was found.  r=njn, r=Waldo, rs=jorendorff on the delta (particularly the Unicode escape bits) from the originally-posted patch