Mysterious crash on iOS 8

Question

I\'m getting a lot of crash reports on iOS 8 with this stack trace:

Date/Time:       2014-09-17T20:26:15Z
OS Version:      iPhone OS 8.0 (12A365)
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Answer 1

I am seeing this on an app which includes a mapKit view on one of the tabs. The error is reportedly tied to updates being performed on the map while the app is backgrounded, and I realized that the only thing that could be getting updated was the user location "blinky" blue dot. So I added code to set

   self.mapview.showsUserLocation = NO; 

whenever the app gets backgrounded, and sets it to YES when it becomes active. This seems to have stopped the error in my alpha testing. I will update this once I get back results from beta testing.