Signal 0 usually (but not always) points to your app being killed for using too much memory.
Your view controllers should received the memory warning method in a low memory situation, and it is up to you to free up some memory when they arrive. If you don't free any memory and continue to use more memory the app will be forcibly quit.
The data formatters message in the console relates to the debugger. For some reason the debugger was unable to load the data formatters used to represent the data in the application. probably because the phone didn't have any memory left for them.
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