rem: iter = gen(); 
add: iter = gen(); 
context:   function foo()    {      function gen() { for(let itty in [5,6,7,8]) yield ({ }); }      iter = gen();      let count = 0;      for each(let _ in iter)                ++count;    }
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/8395/3703c3c05f398a63e55992f7687ef65273b26d6a/regress-350793-01.js/clean/js/tests/js1_7/block/regress-350793-01.js