rem: var x = value; delete x; return x; 
add: var x = value; delete x; return x; 
context: function MyFunction( value ) {    var x = value;    delete x;    return x;}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/4218d0f5950d93cb2609d946f6af7ce1b2e89575/10.2.3-2.js/clean/js/tests/ecma/ExecutionContexts/10.2.3-2.js