Input[datetimeLocal] directive do not support changing second and millisecond.[version 1.3.0-beta.19]

[xieranmaya]

If I write

<input type="datetime-local" step="1" ng-model="datetime">
or
<input type="datetime-local" step="0.001" ng-model="milli">

When changing the second or millisecond value of the input, angular can not parse the input's value, and will also throw an error in the console.
Online demo here: http://jsbin.com/yusapo/2/edit
Try changing second or millisecond of the input after setting appropriate values to year, month, day, hour and minute to some value other than 00 or 000 and see the console in DevTools.