rem: function fetch() { v = iterable.next(); k = keyfunc(v); }; 
add: function fetch(){ v=_171.next(); k=_172(v); } 
context:         function fetch() {            v = iterable.next();            k = keyfunc(v);        };
meta: 8607	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8607/ad067b3f5d648d6df90ec6fb2b79f0027612a307/MochiKit.js/buggy/trunk/lib/MochiKit.js