add:  return true; 
context:   function isInvalidSyntax(a) {    try {      JSON.fromString(a);      return false;    } catch (ex) {      return ex instanceof SyntaxError;    }  }
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/9421/0e4c2e9e2e134021cbfa34acf1a2e2fe15d3a355/test_json.js/clean/js/src/xpconnect/tests/unit/test_json.js