将GMSMarker添加到地图时，应用程序仅在iPhone 5上崩溃：EXC_BAD_ACCESS

The app I'm working on plots a lot of GMSMarkers on a google map. It works perfectly fine in all other devices, except iPhone 5. I have subclassed GMSMarker and set an object id to the subclass. This is done so that I can add the markers to an NSSet and ensure there are only distinct markers that are plotted and no duplicates. The subclass is:The app I'm working on plots a lot of GMSMarker