text: "use strict";
  
  // all three var x|y|z = 4 should be errors I believe so we error on all
  //   v8 --harmony allows the first but not the second and last
  
  if (true) {
      let x = 3;
      if (true) {
          var x = 4;
      }
  }
  
  let y = 3;
  if (true) {
      var y = 4;
  }
  
  (function() {
      if (true) {
          let z = 3;
          if (true) {
              var z = 4;
          }
      }
  })();
  