Terrible getter/value resolution bug that happens in Safari

safari-issue.js

// This simplified test case unfortunately doesn't reproduce the issue
// nevertheless such error occurs in complex app I'm working with

'use strict';

var Foo = function () {}
  , resolve = function () { return {}; };

Object.defineProperty(Foo.prototype, 'bar', {
	configurable: true,
	enumerable: false,
	get: function () {
		var value;
		if (this.hasOwnProperty('bar')) {
			if (Object.getOwnPropertyDescriptor(this, 'bar').value) {
				// Happens in Safari [7.0.2 (9537.74.9)]
				throw new Error("Getter called although property was defined with value!");
			}
			return resolve;
		}
		value = resolve.call(this);
		Object.defineProperty(this, 'bar', {
			configurable: false,
			enumerable: false,
			writable: false,
			value: value
		});
		return value;
	}
});


var foo = new Foo();

console.log(foo.bar);
console.log(foo.bar);