"Property 0 not found." on Mozilla Rhino

[Aquilosion]

Attempting to use core-js-bundle on Mozilla Rhino causes the following error:

Property 0 not found.

Offending expression is Object('z').propertyIsEnumerable(0) in the following:

  /***/ }),
  /* 50 */
  /***/ (function(module, exports, __webpack_require__) {

  // fallback for non-array-like ES3 and non-enumerable old V8 strings
  var classof = __webpack_require__(27);
  // eslint-disable-next-line no-prototype-builtins
  module.exports = Object('z').propertyIsEnumerable(0) ? Object : function (it) {
    return classof(it) == 'String' ? it.split('') : Object(it);
  };

This appears to be a bug in Rhino, and there's already a bug report filed against it which is about a year old.

[zloirock]

Interesting. Could you check, can this error be caught by try / catch?

[Aquilosion]

It appears so. We've replaced the method with the following:

// eslint-disable-next-line no-prototype-builtins
try {
    module.exports = Object('z').propertyIsEnumerable(0) ? Object : function(it) {
        return classof(it) == 'String' ? it.split('') : Object(it);
    };
} catch (error) {
    console.log("Caught error:", error);
}

We're still working on our Rhino integration so I can't tell you anything more about the caught error unfortunately, but try/catch does seem to get it past there and I think it's the only problem.