Ion-refresher can crash my application

I implemented the ion-refresher in order to have the pull-to-refresh feature:

<ion-refresher on-refresh="refreshList()">

refreshList() simply make a $http call to retrieve only 10 items.

However, I experience some randomly crash using my iPhone 4S, iOS 7.1.2 and Ionic beta 12.
What I did is to pull about 10 times manually (scrolling so), with an interval of 2 second and…crash.

Did anyone experience some crashes due to ion-refresher directive?

Error that XCode gives is: EXC_BAD_ACCESS