rem: return "22"; 
add: return "22"; 
context: s.toString = function() {    return "22";}
meta: 10520	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/10520/0b675418ba636127763e94e614e62364d6caa659/regress-313567.js/buggy/js/tests/ecma_3/String/regress-313567.js