rem: return null;  
add: return null;  
context: function fo_read(max){    if (!("inputStream" in this))        throw "file not open for reading.";    var av = this.inputStream.available();    if (typeof max == "undefined")        max = av;    if (!av)        return null;            var rv = this.inputStream.read(max);    return rv;}
meta: 1622	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1622/0918cade427e1856c2e2bcfdefa8b4ea3e457b73/file-utils.js/buggy/js/lib/file-utils.js