Nashorn "this" binding bug reduction

nashorn_this_binding_bug_reduction.js

// -- BEGIN CODE --
function subclass(parentConstructor, proto) {
  function C() {
    parentConstructor.call(this);
  }
  
  C.prototype = Object.create(parentConstructor.prototype);

  for (var prop in proto) {
    if (proto.hasOwnProperty(prop)) {
      C.prototype[prop] = proto[prop];
    }
  }
  
  return C;
}

var Parent = function() {
  this.init();
};

Parent.prototype = {
  init: null
}

var Child1 = subclass(Parent, {
  prop1: 1,
  init: function() {
    print('!!! child 1');
  }
});

var Child2 = subclass(Parent, {
  init: function() {
    print('!!! child 2');
  }
});

new Child1();
new Child2();
// -- END CODE --