Unusual Error appending new element to an array resulting in application crash - arrays

Question

I am fetching a list of items from an API. This works fine. I have a local variable in my view controller such that upon successfully fetch of the items from API, I am reloading my table view.
Recently in the line where I am appending contents of the array from API to my local array variable, I am now getting a crash. I have research severally on SO with no success. I keep getting the thesame error
This is code causing the crash
Irrelevant API fetch code
if refresh {
self?.items = ticketItems
}
else {
self?.ticketItems.append(contentsOf:
ticketItems)
}
Usually, I should not get a crash when appending the contents of an array. This is weird to me. Please Find error message:
Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid parameter not satisfying: !CGSizeEqualToSize(size, CGSizeZero)'
*** First throw call stack:
(
0 CoreFoundation 0x0000000116bb86fb __exceptionPreprocess + 331
1 libobjc.A.dylib 0x00000001157adac5 objc_exception_throw + 48
2 CoreFoundation 0x0000000116bb8482 +[NSException raise:format:arguments:] + 98
3 Foundation 0x000000010fe51927 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 194
4 UIKitCore 0x000000011e0f0399 -[_UIUpdateVisibleCellsContext addSize:forIndexPath:] + 385
5 UIKitCore 0x000000011e0e8643 -[UICollectionViewFlowLayout shouldInvalidateLayoutForPreferredLayoutAttributes:withOriginalAttributes:] + 409
6 UIKitCore 0x000000011e0a2f08 -[UICollectionView _checkForPreferredAttributesInView:originalAttributes:] + 559
7 UIKitCore 0x000000011e0a3c24 -[UICollectionView _createPreparedCellForItemAtIndexPath:withLayoutAttributes:applyAttributes:isFocused:notify:] + 1596
8 UIKitCore 0x000000011e0a35e2 -[UICollectionView _createPreparedCellForItemAtIndexPath:withLayoutAttributes:applyAttributes:] + 31
9 UIKitCore 0x000000011e0a8a8c -[UICollectionView _updateVisibleCellsNow:] + 6120
10 UIKitCore 0x000000011e0adbb6 -[UICollectionView layoutSubviews] + 365
11 UIKitCore 0x000000011ecf99c1 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1417
12 QuartzCore 0x0000000111cf7eae -[CALayer layoutSublayers] + 173
13 QuartzCore 0x0000000111cfcb88 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 396
14 QuartzCore 0x0000000111d08ee4 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 72
15 QuartzCore 0x0000000111c783aa _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 328
16 QuartzCore 0x0000000111caf584 _ZN2CA11Transaction6commitEv + 608
17 QuartzCore 0x0000000111cafede _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 76
18 CoreFoundation 0x0000000116b1f0f7 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
19 CoreFoundation 0x0000000116b195be __CFRunLoopDoObservers + 430
20 CoreFoundation 0x0000000116b19c31 __CFRunLoopRun + 1505
21 CoreFoundation 0x0000000116b19302 CFRunLoopRunSpecific + 626
22 GraphicsServices 0x000000011be162fe GSEventRunModal + 65
23 UIKitCore 0x000000011e82bba2 UIApplicationMain + 140
24 Sterling Bank App 0x000000010c1be211 main + 225
25 libdyld.dylib 0x0000000118307541 start + 1
26 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

Answer 1

I was getting the exact error:
'Invalid parameter not satisfying: !CGSizeEqualToSize(size, CGSizeZero)'
It was just because I forgot to set translatesAutoresizingMaskIntoConstraints to false for a subview I was adding to cell's contentView...