add: return undefined; 
context: function sc_Keyword(str) {    var cached = sc_Keyword.lazy[str];    if (cached)	return cached;    sc_Keyword.lazy[str] = this;    this.val = str;}
meta: 4636	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/4636/6f126e296c2abf467096563f59303f565c8bd74d/runtime.js/buggy/scheme2js/runtime/runtime.js