Crash at initialization

[neil-degoo]

Report

Simultaneous accesses to 0x102a80508, but modification requires exclusive access.
Previous access (a modification) started at PullToRefresh`PullToRefresh.addScrollViewObserving() + 244 (0x1017943e8).
Current access (a modification) started at:
0 libswiftCore.dylib 0x0000000101e75e18 swift_beginAccess + 436
1 PullToRefresh 0x0000000101791c78 PullToRefresh.KVOContext.materializeForSet + 48
2 PullToRefresh 0x0000000101791e20 PullToRefresh.observeValue(forKeyPath:of:change:context:) + 128
3 PullToRefresh 0x00000001017940bc @objc PullToRefresh.observeValue(forKeyPath:of:change:context:) + 500
4 Foundation 0x000000018728a8c0 + 304
5 Foundation 0x00000001872a4418 + 204
6 Foundation 0x00000001872a4240 + 124
7 PullToRefresh 0x00000001017942f4 PullToRefresh.addScrollViewObserving() + 308
8 PullToRefresh 0x000000010178ff78 PullToRefresh.scrollView.didset + 216
9 PullToRefresh 0x00000001017900d8 PullToRefresh.scrollView.setter + 224
10 PullToRefresh 0x000000010179abd0 UIScrollView.addPullToRefresh(_:action:) + 128
11 smsflight 0x00000001006ba3c8 FlightAlertsViewController.viewDidLoad() + 416
12 smsflight 0x00000001006ba758 @objc FlightAlertsViewController.viewDidLoad() + 40
13 UIKit 0x000000018fdc4aec + 1040
14 UIKit 0x000000018fe6c5a0 + 76
15 UIKit 0x000000018fe6b9c8 + 196
16 UIKit 0x000000018fe6b000 + 1168
17 UIKit 0x000000018fe6ae68 + 164
18 UIKit 0x000000018fe6ad50 + 188
19 UIKit 0x000000018fdc1dfc + 1276
20 QuartzCore 0x000000018a97be10 + 184
21 QuartzCore 0x000000018a97fe5c + 332
22 QuartzCore 0x000000018a8ee948 + 336
23 QuartzCore 0x000000018a914c98 + 540
24 QuartzCore 0x000000018a915c98 + 92
25 CoreFoundation 0x0000000186935828 + 32
26 CoreFoundation 0x0000000186933064 + 412
27 CoreFoundation 0x00000001869332b0 + 1292
28 CoreFoundation 0x0000000186853e04 CFRunLoopRunSpecific + 436
29 GraphicsServices 0x00000001886ebf20 GSEventRunModal + 100
30 UIKit 0x000000018fe28218 UIApplicationMain + 208
31 smsflight 0x00000001006c19b0 main + 88
32 libdyld.dylib 0x0000000186376568 + 4

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