text: function f0() {
      var v0 = 1.1;
      var v1 = WeakMap.prototype.set;
      WeakMap.prototype.set = function (k, v) {
          v0 = true;
      };
      new WeakMap([[
              {},
              42
          ]]);
      WeakMap.prototype.set = v1;
      return v0;
  }
  if (!f0())
      throw new Error('Test failed');
  