Githawk: Dismissing specific issue crashes app

[BasThomas]

Version 1.10.0 (1634)
Device: iPhone 7 Plus (iOS 10.3.3)
https://github.com/SwiftWeekly/swiftweekly.github.io/issues/308

[BasThomas]

Cannot reproduce on 5s simulator, can on 7 Plus. Stack trace:

Freetime[6318:192736] *** Assertion failure in -[UICollectionView dealloc], /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit_Sim/UIKit-3600.7.47/UICollectionView.m:753
2017-09-04 22:17:59.664 Freetime[6318:192736] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'UICollectionView (<UICollectionView: 0x7ffab68af200; frame = (0 0; 414 658); clipsToBounds = YES; gestureRecognizers = <NSArray: 0x60000045b540>; layer = <CALayer: 0x6000004231e0>; contentOffset: {0, 129}; contentSize: {414, 787}> collection view layout: <UICollectionViewFlowLayout: 0x7ffab5d33460>) was deallocated while an update was in flight'
*** First throw call stack:
(
    0   CoreFoundation                      0x0000000106802b0b __exceptionPreprocess + 171
    1   libobjc.A.dylib                     0x0000000106267141 objc_exception_throw + 48
    2   CoreFoundation                      0x0000000106806cf2 +[NSException raise:format:arguments:] + 98
    3   Foundation                          0x0000000105e01536 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 193
    4   UIKit                               0x000000010803f7bc -[UICollectionView dealloc] + 704
    5   CoreFoundation                      0x00000001068592ad common_removeAllObjects + 189
    6   CoreFoundation                      0x000000010673a373 -[__NSArrayM dealloc] + 19
    7   libobjc.A.dylib                     0x000000010627bb8e _ZN11objc_object17sidetable_releaseEb + 202
    8   libobjc.A.dylib                     0x000000010627c2fa _ZN12_GLOBAL__N_119AutoreleasePoolPage3popEPv + 866
    9   UIKit                               0x00000001077aa2f7 -[UIView dealloc] + 1841
    10  libobjc.A.dylib                     0x000000010627c2fa _ZN12_GLOBAL__N_119AutoreleasePoolPage3popEPv + 866
    11  CoreFoundation                      0x0000000106751e96 _CFAutoreleasePoolPop + 22
    12  CoreFoundation                      0x000000010678daec __CFRunLoopRun + 2172
    13  CoreFoundation                      0x000000010678d016 CFRunLoopRunSpecific + 406
    14  GraphicsServices                    0x000000010e811a24 GSEventRunModal + 62
    15  UIKit                               0x0000000107715134 UIApplicationMain + 159
    16  Freetime                            0x00000001048ff077 main + 55
    17  libdyld.dylib                       0x000000010aa9a65d start + 1
    18  ???                                 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

[BasThomas]

See also https://github.com/Citrrus/MBContactPicker/issues/66

[rnystrom]

Weird I think I noticed this before too. Might be from adding the KVO for web view resizing? Will dig. Glad there's specific issues causing it!

[rnystrom]

Confirmed its the KVO that's causing the crash. Figuring out what the issue is tho.