anchor.diff:  // foo/bar.dart 10:11 in Foo._bar
   // http://dartlang.org/foo/bar.dart in Foo._bar
   final _friendlyFrame = new RegExp(
  -    r'^([^\s]+)(?: (\d+)(?::(\d+))?)?\s+([^\d][^\s]*)$');
  +    r'^(\S+)(?: (\d+)(?::(\d+))?)?\s+([^\d]\S*)$');
   
   final _initialDot = new RegExp(r"^\.");
   
  
positive.code:     // nesting for each eval performed on that line.
      parseLocation(location, member) {
        var evalMatch = _v8EvalLocation.firstMatch(location);
        if (evalMatch != null) return parseLocation(evalMatch[1], member);
        
  
        var urlMatch = _v8UrlLocation.firstMatch(location);
        if (urlMatch == null) {
  
negative.code: // eval as function (eval as otherFunction
  //     (http://pub.dartlang.org/stuff.dart.js:560:28))
  final _v8EvalLocation = new RegExp(
      r'^eval at (?:\S.*?) \((.*)\)(?:, .*?:\d+:\d+)?$');
  
  // foo$bar$0@http://pub.dartlang.org/stuff.dart.js:560:28
  // http://pub.dartlang.org/stuff.dart.js:560:28
  