infinite loop when onclose event shows a second calendar

It worked fine in 1.8.12. In 1.8.13 a bug was introduced and the second calendar wouldn't close. In 1.8.16 the second calendar wouldn't fire up since onClose from the first calendar remains stuck in a continuous loop.

jQuery(function($) {
	jQuery('#fromDate').datepicker({
		'onClose':function(selectedDate) {
			console.log('loop');
			$('#toDate').datepicker('show');
		}
	});
	
	jQuery('#toDate').datepicker({
	});
});