ng-init-invalid-accesses.html

<!DOCTYPE html>
<html>
<head>
<script data-require="angular.js@1.4.8" data-semver="1.4.8" src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.8/angular.min.js"></script>
</head>
<body ng-app>
<div ng-init="validVariable = {property1: 'Im a property', arrayProperty: ['1','2']}">
        -{{invalidVariable.arrayProperty[1]}}<br/>
        -{{validVariable.invalidProperty.property1}}<br/>
        -{{validVariable.arrayProperty[2]}}
    </div>
</body>
</html>

http://blog.allii.ir/2016/01/angularjs-beginner-intermediate-course-basics/#directives