AutoCoding crash due to NSArray mutated while being enumerated.

[kylesmyth]

Not quite sure what's going on here. Unfortunately I can't reproduce the crash, and crashlytics is giving me incorrect line numbers so I can't see exactly where in code this happens. I should note that Countsheet.m implements its own NSCoding / NSCopying - could that be the issue?

Fatal Exception: NSGenericException
*** Collection <__NSArrayM: 0x134b95200> was mutated while being enumerated.
0 CoreFoundation 0x18280edb0 __exceptionPreprocess
1 libobjc.A.dylib 0x181e73f80 objc_exception_throw
2 CoreFoundation 0x18280e7e4 -[NSException name]
3 Foundation 0x18315c04c -[NSKeyedArchiver _encodeArrayOfObjects:forKey:]
4 Foundation 0x18315abb0 _encodeObject
5 RQMobile 0x100168db0 -NSObject(AutoCoding) encodeWithCoder:
6 RQMobile 0x10008bbb4 -RQMobileObject encodeWithCoder:
7 RQMobile 0x10007d010 -Countsheet encodeWithCoder:
8 Foundation 0x18315abb0 _encodeObject
9 Foundation 0x18315c064 -[NSKeyedArchiver _encodeArrayOfObjects:forKey:]
10 Foundation 0x18315bc84 -[NSDictionary(NSDictionary) encodeWithCoder:]
11 Foundation 0x18315abb0 _encodeObject
12 Foundation 0x1831b7790 +[NSKeyedArchiver archiveRootObject:toFile:]