michael@0: function test() {
michael@0:     var a = ['x', '', '', '', '', '', '', 'x'];
michael@0:     var b = '';
michael@0:     for (var i = 0; i < a.length; i++) {
michael@0:         (function() {
michael@0:             a[i].replace(/x/, function() { return b; });
michael@0:         }());
michael@0:     }
michael@0: }
michael@0: test();  // should NOT get a ReferenceError for b on trace