rem: for (var i = 0; i < length; i++) newArray[i] = this[start++]; 
add: for (var i = 0; i < length; i++, start++){ if (start in this) newArray[i] = this[start]; } 
context: 	copy: function(start, length){		start = start || 0;		if (start < 0) start = this.length + start;		length = length || (this.length - start);		var newArray = [];		for (var i = 0; i < length; i++) newArray[i] = this[start++];		return newArray;	},
meta: 7826	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/7826/ad21ba136685cc9eebd3a9ca3fb5e53e7da86e2d/Array.js/buggy/Native/Array.js