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My app occasionally crashes unexpectedly, I don’t know the specific reason Full stack of crash below Crashed: com.apple.main-thread 0 libobjc.A.dylib 0x1bb317b30 objcmsgSend + 16 1 Foundation 0x1bb932470 -[NSLayoutConstraint referencesLayoutItem:] + 40 2 UIKitCore 0x1bfa9cba8 -[UILayoutGuide snipReferencingConstraints] + 308 3 UIKitCore 0x1bfa9bf2c -[UILayoutGuide owningViewIsDeallocating] + 40 4 UIKitCore 0x1bfb33584 -[UIView layoutConstraintCleanup] + 212 5 UIKitCore 0x1bfb33774 -[UIView dealloc] + 148 6 putong 0x1089225dc -[PUGUserCardClassicBasicInfoViewV1 .cxxdestruct] + 45 (PUGUserCardClassicBasicInfoViewV1.m:45) 7 libobjc.A.dylib 0x1bb31ac90 objectcxxDestructFromClass(objcobject*, objcclass*) + 112 8 libobjc.A.dylib 0x1bb32ecc4 objcdestructInstance + 88 9 libobjc.A.dylib 0x1bb33573c objcrootDealloc + 52 10 UIKitCore 0x1bf6da280 -[UIResponder dealloc] + 152 11 UIKitCore 0x1bfb33a48 -[UIView dealloc] + 872 12 libobjc.A.dylib 0x1bb33804c AutoreleasePoolPage::releaseUntil(objcobject**) + 180 13 libobjc.A.dylib 0x1bb337f44 objcautoreleasePoolPop + 224 14 UIKitCore 0x1bfb33a2c -[UIView dealloc] + 844 15 libobjc.A.dylib 0x1bb31ac90 objectcxxDestructFromClass(objcobject*, objcclass*) + 112 16 libobjc.A.dylib 0x1bb32ecc4 objcdestructInstance + 88 17 libobjc.A.dylib 0x1bb33573c objcrootDealloc + 52 18 UIKitCore 0x1bf6da280 -[UIResponder dealloc] + 152 19 UIKitCore 0x1bfb33a48 -[UIView dealloc] + 872 20 putong 0x108931034 -[PUGUserCardViewV1 dealloc] + 114 (PUGUserCardViewV1.m:114) 21 putong 0x1088f80b8 -[PUGSwipeViewControllerV1 dislikeAction:actionType:sourceType:] + 2242 (PUGSwipeViewControllerV1.m:2242) 22 putong 0x1088f67f8 -[PUGSwipeViewControllerV1 performAction:userCard:actionType:sourceType:] + 2010 (PUGSwipeViewControllerV1.m:2010) 23 putong 0x1088f5658 -[PUGSwipeViewControllerV1 userCard:didEndPanningWithOffset:velocity:] + 1828 (PUGSwipeViewControllerV1.m:1828) 24 putong 0x10892f3ac -[PUGUserCardViewV1(Swiping) endPanning:] + 100 (PUGUserCardViewV1+Swiping.m:100) 25 putong 0x10892ee48 -[PUGUserCardViewV1(Swiping) panCard:] + 71 (PUGUserCardViewV1+Swiping.m:71) 26 UIKitCore 0x1bf285ca4 -[UIGestureRecognizerTarget sendActionWithGestureRecognizer:] + 48 27 UIKitCore 0x1bf28f19c UIGestureRecognizerSendTargetActions + 124 28 UIKitCore 0x1bf28bbf0 UIGestureRecognizerSendActions + 352 29 UIKitCore 0x1bf28b168 -[UIGestureRecognizer updateGestureForActiveEvents] + 652 30 UIKitCore 0x1bf27ebd8 UIGestureEnvironmentUpdate + 2148 31 UIKitCore 0x1bf27e328 -[UIGestureEnvironment deliverEvent:toGestureRecognizers:usingBlock:] + 372 32 UIKitCore 0x1bf27e0f4 -[UIGestureEnvironment updateForEvent:window:] + 232 33 UIKitCore 0x1bf6e9c48 -[UIWindow sendEvent:] + 3440 34 UIKitCore 0x1bf6c58ec -[UIApplication sendEvent:] + 344 35 UIKitCore 0x1bf746970 dispatchPreprocessedEventFromEventQueue + 6808 36 UIKitCore 0x1bf7494ec handleEventQueueInternal + 5364 37 UIKitCore 0x1bf741168 handleHIDEventFetcherDrain + 140 38 CoreFoundation 0x1bb577ad8 CFRUNLOOPISCALLINGOUTTOASOURCE0PERFORMFUNCTION + 24 39 CoreFoundation 0x1bb577a30 CFRunLoopDoSource0 + 80 40 CoreFoundation 0x1bb5771b8 CFRunLoopDoSources0 + 184 41 CoreFoundation 0x1bb5721e8 _CFRunLoopRun + 788 42 CoreFoundation 0x1bb571ba8 CFRunLoopRunSpecific + 424 43 GraphicsServices 0x1c56e1344 GSEventRunModal + 160 44 UIKitCore 0x1bf6ad3e4 UIApplicationMain + 1932 45 putong 0x109e12b88 main + 43 (main.m:43) 46 libdyld.dylib 0x1bb3f98f0 start + 4