Tracing cause of NSRangeException - exception breakpoint always returns to `int main(int argc, char * argv[])` - objective-c

Question

I've been stuck on this all day, and struggling to identify the source of a NSRangeException crash.
The app builds fine, but in the process of loading the first scene it throws:
2015-05-01 17:21:48.606 AppName[3707:447852] *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayM objectAtIndex:]: index 4 beyond bounds [0 .. 3]'
The full stack trace is:
*** First throw call stack:
(
0 CoreFoundation 0x0000000111d22c65 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x0000000111584bb7 objc_exception_throw + 45
2 CoreFoundation 0x0000000111c0c093 -[__NSArrayM objectAtIndex:] + 227
3 UIKit 0x000000010f311881 _UIViewTopDownSubtreeTraversal + 193
4 UIKit 0x000000010f932fa3 -[UIView(UIConstraintBasedLayout_EngineDelegate) _invalidateSystemLayoutSizeFittingSizeAtEngineDelegateLevel] + 141
5 Foundation 0x000000010e931d6f -[NSISEngine tryToAddConstraintWithMarker:expression:integralizationAdjustment:mutuallyExclusiveConstraints:] + 915
6 Foundation 0x000000010eabc1e8 -[NSLayoutConstraint _addLoweredExpression:toEngine:integralizationAdjustment:lastLoweredConstantWasRounded:mutuallyExclusiveConstraints:] + 275
7 Foundation 0x000000010e92649a -[NSLayoutConstraint _addToEngine:integralizationAdjustment:mutuallyExclusiveConstraints:] + 220
8 UIKit 0x000000010f92fa34 __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke_2 + 474
9 Foundation 0x000000010e9341be -[NSISEngine withBehaviors:performModifications:] + 155
10 UIKit 0x000000010f92f83a __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke + 452
11 UIKit 0x000000010f92f64d -[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:] + 197
12 UIKit 0x000000010f92f933 __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke_2 + 217
13 Foundation 0x000000010e9341be -[NSISEngine withBehaviors:performModifications:] + 155
14 UIKit 0x000000010f92f83a __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke + 452
15 UIKit 0x000000010f92f64d -[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:] + 197
16 UIKit 0x000000010f92f2de -[UIView(AdditionalLayoutSupport) _initializeHostedLayoutEngine] + 404
17 UIKit 0x000000010f92426e -[UIView(UIConstraintBasedLayout) _layoutEngine_windowDidChange] + 126
18 UIKit 0x000000010f32f561 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 209
19 UIKit 0x000000010f32f74a -[UIView(Internal) _didMoveFromWindow:toWindow:] + 698
20 UIKit 0x000000010f327ecf __45-[UIView(Hierarchy) _postMovedFromSuperview:]_block_invoke + 125
21 UIKit 0x000000010f327e43 -[UIView(Hierarchy) _postMovedFromSuperview:] + 437
22 UIKit 0x000000010f331f48 -[UIView(Internal) _addSubview:positioned:relativeTo:] + 1660
23 UIKit 0x000000010f61884c -[UINavigationTransitionView transition:fromView:toView:] + 479
24 UIKit 0x000000010f4161b0 -[UINavigationController _startTransition:fromViewController:toViewController:] + 2984
25 UIKit 0x000000010f416448 -[UINavigationController _startDeferredTransitionIfNeeded:] + 523
26 UIKit 0x000000010f416f0e -[UINavigationController __viewWillLayoutSubviews] + 43
27 UIKit 0x000000010f561715 -[UILayoutContainerView layoutSubviews] + 202
28 UIKit 0x000000010f334a2b -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 536
29 QuartzCore 0x000000010eff4ec2 -[CALayer layoutSublayers] + 146
30 QuartzCore 0x000000010efe96d6 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 380
31 QuartzCore 0x000000010efe9546 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 24
32 QuartzCore 0x000000010ef55886 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 242
33 QuartzCore 0x000000010ef56a3a _ZN2CA11Transaction6commitEv + 462
34 UIKit 0x000000010f2b2a2d -[UIApplication _reportMainSceneUpdateFinished:] + 44
35 UIKit 0x000000010f2b36f1 -[UIApplication _runWithMainScene:transitionContext:completion:] + 2648
36 UIKit 0x000000010f2b20d5 -[UIApplication workspaceDidEndTransaction:] + 179
37 FrontBoardServices 0x00000001158955e5 __31-[FBSSerialQueue performAsync:]_block_invoke_2 + 21
38 CoreFoundation 0x0000000111c5641c __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12
39 CoreFoundation 0x0000000111c4c165 __CFRunLoopDoBlocks + 341
40 CoreFoundation 0x0000000111c4b923 __CFRunLoopRun + 851
41 CoreFoundation 0x0000000111c4b366 CFRunLoopRunSpecific + 470
42 UIKit 0x000000010f2b1b42 -[UIApplication _run] + 413
43 UIKit 0x000000010f2b4900 UIApplicationMain + 1282
44 My360 0x000000010dcf26ff main + 111
45 libdyld.dylib 0x00000001127f5145 start + 1
46 ??? 0x0000000000000001 0x0 + 1
)
It's a large app, and I cannot identify which objectAtIndex is causing the issue.
After looking at similar issues, I added an Exception breakpoint:
However the breakpoint just keeps taking me back to the main.m file:
int main(int argc, char * argv[]) {
#autoreleasepool {
return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
}
Can anyone point me towards how I can identify the line that is causing this exception?
Thanks!
Edit:
When I click on the My360 icon at the top of the debugging console, it shows this: