AgrumeCell.startImageDragging crash in iOS 18

[ba01ei]

This crash started in iOS 18. No code around AgrumeCell has changed, and AgrumeCell hasn't updated during this time either. We are on 5.8.10. I can't reproduce the crash by panning or dragging the image, we just saw the crash logs.

stacktrace:

Crashed: com.apple.main-thread
0  libsystem_kernel.dylib         0xc1d4 __pthread_kill + 8
1  libsystem_pthread.dylib        0x7ef8 pthread_kill + 268
2  libsystem_c.dylib              0x77ad8 abort + 128
3  libsystem_c.dylib              0x76e08 err + 282
4  PhysicsKit                     0x3e7d4 b2CollideEdgeAndCircle(b2Manifold*, b2EdgeShape const*, b2Transform const&, b2CircleShape const*, b2Transform const&) (.cold.1) + 42
5  PhysicsKit                     0x7348 -[PKPhysicsBody setDensity:] + 148
6  UIKitCore                      0xbdaedc -[UIDynamicItemBehavior _configureBody:forView:] + 216
7  UIKitCore                      0xbdc094 -[UIDynamicItemBehavior _reevaluate:] + 232
8  UIKitCore                      0xbdc144 -[UIDynamicItemBehavior _associate] + 68
9  UIKitCore                      0xbd10a4 -[UIDynamicAnimator _registerBehavior:] + 196
10 UIKitCore                      0xbd0ec0 -[UIDynamicAnimator addBehavior:] + 96
11 AppName                         0x12e8948 AgrumeCell.startImageDragging(_:translationOffset:) + 452 (AgrumeCell.swift:452)
12 AppName                         0x12e8c54 @objc AgrumeCell.dismissPan(_:) + 4329229396 (<compiler-generated>:4329229396)
13 UIKitCore                      0x3f2ac4 -[UIGestureRecognizerTarget _sendActionWithGestureRecognizer:] + 128
14 UIKitCore                      0x3f2934 _UIGestureRecognizerSendTargetActions + 92
15 UIKitCore                      0x3f26f4 _UIGestureRecognizerSendActions + 284
16 UIKitCore                      0xa5b28 -[UIGestureRecognizer _updateGestureForActiveEvents] + 572
17 UIKitCore                      0x77724 _UIGestureEnvironmentUpdate + 2488
18 UIKitCore                      0x16ba00 -[UIGestureEnvironment _deliverEvent:toGestureRecognizers:usingBlock:] + 336
19 UIKitCore                      0x30bfe4 -[UIGestureEnvironment _updateForEvent:window:] + 188
20 UIKitCore                      0x30b3c8 -[UIWindow sendEvent:] + 2948
21 AppName                         0x92c92c @objc UIWindow.sendEvent(_:) + 59
22 UIKitCore                      0x19fb70 -[UIApplication sendEvent:] + 376
23 UIKitCore                      0x1a009c __dispatchPreprocessedEventFromEventQueue + 1048
24 UIKitCore                      0x1a9f3c __processEventQueue + 5696
25 UIKitCore                      0xa2c60 updateCycleEntry + 160
26 UIKitCore                      0xa09d8 _UIUpdateSequenceRun + 84
27 UIKitCore                      0xa0628 schedulerStepScheduledMainSection + 172
28 UIKitCore                      0xa159c runloopSourceCallback + 92
29 CoreFoundation                 0x56328 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 28
30 CoreFoundation                 0x562bc __CFRunLoopDoSource0 + 176
31 CoreFoundation                 0x53dc0 __CFRunLoopDoSources0 + 244
32 CoreFoundation                 0x52fbc __CFRunLoopRun + 840
33 CoreFoundation                 0x52830 CFRunLoopRunSpecific + 588
34 GraphicsServices               0x11c4 GSEventRunModal + 164
35 UIKitCore                      0x3d2eb0 -[UIApplication _run] + 816
36 UIKitCore                      0x4815b4 UIApplicationMain + 340
37 AppName                         0x73418 main + 52 (AppDelegate.swift:52)

Crash happens across all iOS 18 version from 18.0 - 18.2, and for both iPhones and iPads.

[JanGorman]

Thanks for reporting. I'll see if I can find anything