angular.fromJson not working properly - angularjs

Question

The code is as follows
var taskString = window.localStorage['tasks'];
if(taskString) {
var tasks = angular.fromJson(taskString);
console.log(tasks);
}
I had a json format string stored in the window.localStorage['tasks'], which is like this
[{"title":"a"},{"title":"b"},{"title":"c"}]
so that the var taskString would be exactly [{"title":"a"},{"title":"b"},{"title":"c"}]
in the code I tried to parse this string into a json array tasks, and the array should contain three objects with the title attribute set separately as a, b and c
but the problem here is, after the execution of angular.fromJson(taskString), I print the array out to the console, and in the array the titles become b,c, and undefined
Is this a bug of that funciton? Or did I mistankenly do something I shouldn't have in my code?
Thanks

Answer 1

It seems to work fine. Look at the following example snippet. I emulated localStorage as storage.
Check for any silly mistakes or if you are setting it properly.
var storage = {
setItem: function(name, item) {
this[name] = item
}
}
storage.setItem('tasks', '[{"title":"a"},{"title":"b"},{"title":"c"}]')
var taskString = storage['tasks'];
if (taskString) {
var tasks = angular.fromJson(taskString);
console.log(tasks);
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>

Answer 2

var json = '[{"title":"a"},{"title":"b"},{"title":"c"}]';
var obj = angular.fromJson(json);
console.log(obj);
Works fine for me, below is the fiddle:
http://jsfiddle.net/n8ezb7sg/89/