text: //// [protoInIndexer.ts]
  class X {
      constructor() {
          this['__proto__'] = null; // used to cause ICE
      }
  }
  
  //// [protoInIndexer.js]
  var X = (function () {
      function X() {
          this['__proto__'] = null;
      }
      return X;
  })();
  