I write a macOS app with SwiftUI, Xcode crashed at AppDelegate, but not crash every time. I have tried to add Exception Breakpoint, but it didn't work. The probably code as below
var body: some View {
ZStack {
if updateTrackingPoint {
ForEach(faceMark.points, id: \.id, content: { point in
self.circleViewForPoint(point)
}).allowsHitTesting(true)
} else if canvasViewModel.showHandGesturePoints {
ForEach(faceMark.points.filter{ return $0.id >= 110 && $0.id <= 114 }, id: \.id, content: { point in
self.circleViewForPoint(point)
}).allowsHitTesting(true)
} else {
ForEach(faceMark.points, id: \.id, content: { point in
self.circleViewForPoint(point)
}).allowsHitTesting(false)
}
}
}
Here is the crash stack.
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0)
frame #0: 0x00007fff42052f3d SwiftUI`SwiftUI._VariadicView_Children.subscript.read : (Swift.Int) -> SwiftUI._VariadicView_Children.Element + 205
frame #1: 0x00007fff42052e39 SwiftUI`protocol witness for Swift.Collection.subscript.read : (A.Index) -> A.Element in conformance SwiftUI._VariadicView_Children : Swift.Collection in SwiftUI + 41
frame #2: 0x00007fff41e0dd21 SwiftUI`SwiftUI.(ForEachChild in _00713678F075B914F7FE0E74B0A90E85).updateValue() -> () + 785
frame #3: 0x00007fff41a56b2a SwiftUI`partial apply forwarder for implicit closure #2 (Swift.UnsafeMutableRawPointer, __C.AGAttribute) -> () in implicit closure #1 (A1.Type) -> (Swift.UnsafeMutableRawPointer, __C.AGAttribute) -> () in closure #1 () -> (Swift.UnsafeMutableRawPointer, __C.AGAttribute) -> () in closure #1 (Swift.UnsafePointer<A1>) -> AttributeGraph.Attribute<A> in AttributeGraph.Attribute.init<A where A == A1.Value, A1: AttributeGraph.StatefulRule>(A1) -> AttributeGraph.Attribute<A> + 26
frame #4: 0x00007fff4250417f AttributeGraph`AG::Graph::UpdateStack::update() + 505
frame #5: 0x00007fff42504608 AttributeGraph`AG::Graph::update_attribute(AG::data::ptr<AG::Node>, bool) + 322
frame #6: 0x00007fff425095bb AttributeGraph`AG::Graph::input_value_ref_slow(AG::data::ptr<AG::Node>, AG::AttributeID, unsigned int, AGSwiftMetadata const*, bool*, long) + 523
frame #7: 0x00007fff4251aafd AttributeGraph`AGGraphGetValue + 198
frame #8: 0x00007fff4193ad47 SwiftUI`SwiftUI.LazyMenuContent.itemList.getter : Swift.Optional<SwiftUI.PlatformItemList> + 39
frame #9: 0x00007fff4193af5d SwiftUI`SwiftUI.LazyMenuContent.updateValue() -> () + 509
frame #10: 0x00007fff41a56b2a SwiftUI`partial apply forwarder for implicit closure #2 (Swift.UnsafeMutableRawPointer, __C.AGAttribute) -> () in implicit closure #1 (A1.Type) -> (Swift.UnsafeMutableRawPointer, __C.AGAttribute) -> () in closure #1 () -> (Swift.UnsafeMutableRawPointer, __C.AGAttribute) -> () in closure #1 (Swift.UnsafePointer<A1>) -> AttributeGraph.Attribute<A> in AttributeGraph.Attribute.init<A where A == A1.Value, A1: AttributeGraph.StatefulRule>(A1) -> AttributeGraph.Attribute<A> + 26
frame #11: 0x00007fff4250417f AttributeGraph`AG::Graph::UpdateStack::update() + 505
frame #12: 0x00007fff42504608 AttributeGraph`AG::Graph::update_attribute(AG::data::ptr<AG::Node>, bool) + 322
frame #13: 0x00007fff4250909a AttributeGraph`AG::Graph::value_ref(AG::AttributeID, AGSwiftMetadata const*, bool*) + 130
frame #14: 0x00007fff4251ab4b AttributeGraph`AGGraphGetValue + 276
frame #15: 0x00007fff41f09f43 SwiftUI`generic specialization <SwiftUI._ResolvedPopUpButton.DetailLabel> of SwiftUI.AppKitPopUpButton.(PlatformView in _9826ADB71E4B5CD44D3C087EB61B7359).Coordinator.menuNeedsUpdate(__C.NSMenu) -> () + 227
frame #16: 0x00007fff41f09bd8 SwiftUI`generic specialization <SwiftUI._ResolvedPopUpButton.DetailLabel> of SwiftUI.AppKitPopUpButton.(PlatformView in _9826ADB71E4B5CD44D3C087EB61B7359).updateNSView(_: __C.NSPopUpButton, context: SwiftUI.NSViewRepresentableContext<SwiftUI.AppKitPopUpButton<A>.(PlatformView in _9826ADB71E4B5CD44D3C087EB61B7359)>) -> () + 936
frame #17: 0x00007fff41ea1160 SwiftUI`generic specialization <SwiftUI.AppKitPopUpButton<SwiftUI._ResolvedPopUpButton.DetailLabel>.(PlatformView in _9826ADB71E4B5CD44D3C087EB61B7359)> of SwiftUI.(PlatformViewRepresentableAdaptor in _38FE679A85C91B802D25DB73BF37B09F).updateViewProvider(_: A.NSViewType, context: SwiftUI.PlatformViewRepresentableContext<SwiftUI.(PlatformViewRepresentableAdaptor in _38FE679A85C91B802D25DB73BF37B09F)<A>>) -> () + 240
frame #18: 0x00007fff41f21a26 SwiftUI`merged generic specialization <SwiftUI.(PlatformViewRepresentableAdaptor in _38FE679A85C91B802D25DB73BF37B09F)<SwiftUI.AppKitPopUpButton<SwiftUI._ResolvedPopUpButton.DetailLabel>.(PlatformView in _9826ADB71E4B5CD44D3C087EB61B7359)>> of closure #1 () -> () in closure #1 () -> () in closure #4 () -> () in closure #1 () -> () in SwiftUI.(PlatformViewChild in _A513612C07DFA438E70B9FA90719B40D).updateValue() -> () + 134
frame #19: 0x00007fff41f2054f SwiftUI`generic specialization <SwiftUI.(PlatformViewRepresentableAdaptor in _38FE679A85C91B802D25DB73BF37B09F)<SwiftUI.AppKitPopUpButton<SwiftUI._ResolvedPopUpButton.DetailLabel>.(PlatformView in _9826ADB71E4B5CD44D3C087EB61B7359)>> of closure #1 () -> () in closure #4 () -> () in closure #1 () -> () in SwiftUI.(PlatformViewChild in _A513612C07DFA438E70B9FA90719B40D).updateValue() -> () + 223
frame #20: 0x00007fff421af78a SwiftUI`(extension in SwiftUI):SwiftUI.ViewRendererHost.performExternalUpdate(() -> ()) -> () + 186
frame #21: 0x00007fff41f12614 SwiftUI`generic specialization <SwiftUI.(PlatformViewRepresentableAdaptor in _38FE679A85C91B802D25DB73BF37B09F)<SwiftUI.AppKitPopUpButton<SwiftUI._ResolvedPopUpButton.DetailLabel>.(PlatformView in _9826ADB71E4B5CD44D3C087EB61B7359)>> of closure #1 () -> () in SwiftUI.(PlatformViewChild in _A513612C07DFA438E70B9FA90719B40D).updateValue() -> () + 1956
frame #22: 0x00007fff41f1145d SwiftUI`merged generic specialization <SwiftUI.(PlatformViewRepresentableAdaptor in _38FE679A85C91B802D25DB73BF37B09F)<SwiftUI.AppKitPopUpButton<SwiftUI._ResolvedPopUpButton.DetailLabel>.(PlatformView in _9826ADB71E4B5CD44D3C087EB61B7359)>> of SwiftUI.(PlatformViewChild in _A513612C07DFA438E70B9FA90719B40D).updateValue() -> () + 637
frame #23: 0x00007fff41fbdd90 SwiftUI`partial apply forwarder for generic specialization <SwiftUI.ModifiedContent<SwiftUI.ModifiedContent<SwiftUI.ModifiedContent<SwiftUI.ViewLeafView<SwiftUI.(PlatformViewRepresentableAdaptor in _38FE679A85C91B802D25DB73BF37B09F)<SwiftUI.AppKitPopUpButton<SwiftUI._ResolvedPopUpButton.DetailLabel>.(PlatformView in _9826ADB71E4B5CD44D3C087EB61B7359)>>, SwiftUI.AccessibilityPlatformModifier>, SwiftUI._AlignmentWritingModifier>, SwiftUI._AlignmentWritingModifier>, SwiftUI.(PlatformViewChild in _A513612C07DFA438E70B9FA90719B40D)<SwiftUI.(PlatformViewRepresentableAdaptor in _38FE679A85C91B802D25DB73BF37B09F)<SwiftUI.AppKitPopUpButton<SwiftUI._ResolvedPopUpButton.DetailLabel>.(PlatformView in _9826ADB71E4B5CD44D3C087EB61B7359)>>> of implicit closure #2 (Swift.UnsafeMutableRawPointer, __C.AGAttribute) -> () in implicit closure #1 (A1.Type) -> (Swift.UnsafeMutableRawPointer, __C.AGAttribute) -> () in closure #1 () -> (Swift.UnsafeMutableRawPointer, __C.AGAttribute) -> () in closure #1 (Swift.UnsafePointer<A1>) -> AttributeGraph.Attribute<A> in AttributeGraph.Attribute.init<A where A == A1.Value, A1: AttributeGraph.StatefulRule>(A1) -> AttributeGraph.Attribute<A> + 32
frame #24: 0x00007fff4250417f AttributeGraph`AG::Graph::UpdateStack::update() + 505
frame #25: 0x00007fff42504608 AttributeGraph`AG::Graph::update_attribute(AG::data::ptr<AG::Node>, bool) + 322
frame #26: 0x00007fff425095bb AttributeGraph`AG::Graph::input_value_ref_slow(AG::data::ptr<AG::Node>, AG::AttributeID, unsigned int, AGSwiftMetadata const*, bool*, long) + 523
frame #27: 0x00007fff4251aafd AttributeGraph`AGGraphGetValue + 198
frame #28: 0x00007fff41ccc6e1 SwiftUI`SwiftUI.(AlignmentModifiedLayoutComputer in _3A1D0350CBB400C95A809DBE8B845F0C).updateValue() -> () + 33
frame #29: 0x00007fff41fc626f SwiftUI`partial apply forwarder for generic specialization <SwiftUI.LayoutComputer, SwiftUI.(AlignmentModifiedLayoutComputer in _3A1D0350CBB400C95A809DBE8B845F0C)> of implicit closure #2 (Swift.UnsafeMutableRawPointer, __C.AGAttribute) -> () in implicit closure #1 (A1.Type) -> (Swift.UnsafeMutableRawPointer, __C.AGAttribute) -> () in closure #1 () -> (Swift.UnsafeMutableRawPointer, __C.AGAttribute) -> () in closure #1 (Swift.UnsafePointer<A1>) -> AttributeGraph.Attribute<A> in AttributeGraph.Attribute.init<A where A == A1.Value, A1: AttributeGraph.StatefulRule>(A1) -> AttributeGraph.Attribute<A> + 15
frame #30: 0x00007fff4250417f AttributeGraph`AG::Graph::UpdateStack::update() + 505
frame #31: 0x00007fff42504608 AttributeGraph`AG::Graph::update_attribute(AG::data::ptr<AG::Node>, bool) + 322
frame #32: 0x00007fff425095bb AttributeGraph`AG::Graph::input_value_ref_slow(AG::data::ptr<AG::Node>, AG::AttributeID, unsigned int, AGSwiftMetadata const*, bool*, long) + 523
frame #33: 0x00007fff4251a923 AttributeGraph`AGGraphGetInputValue + 234
frame #34: 0x00007fff41bb6bfe SwiftUI`generic specialization <SwiftUI._AlignmentLayout> of (extension in SwiftUI):SwiftUI.UnaryLayout.spacing(in: SwiftUI.SizeAndSpacingContext, child: SwiftUI.LayoutProxy) -> SwiftUI.Spacing + 62
frame #35: 0x00007fff41ccafbd SwiftUI`SwiftUI.LayoutComputer.EngineDelegate.spacing() -> SwiftUI.Spacing + 61
frame #36: 0x00007fff423237b7 SwiftUI`accumulateSpacing #1 (ofChild: Swift.Int) -> CoreGraphics.CGFloat in SwiftUI.StackLayout.(Header in _68D684484B5AEF917B6B8353D57CF590).init(layoutContext: SwiftUI.SizeAndSpacingContext, proxies: SwiftUI.LayoutProxyCollection, majorAxis: SwiftUI.Axis, minorAxisAlignment: SwiftUI.AlignmentKey, uniformSpacing: Swift.Optional<CoreGraphics.CGFloat>, childStorage: Swift.UnsafeMutablePointer<SwiftUI.StackLayout.(Child in _68D684484B5AEF917B6B8353D57CF590)>, capacity: Swift.Int, resizeChildrenWithTrailingOverflow: Swift.Bool) -> SwiftUI.StackLayout.(Header in _68D684484B5AEF917B6B8353D57CF590) + 279
frame #37: 0x00007fff4232330e SwiftUI`SwiftUI.StackLayout.(Header in _68D684484B5AEF917B6B8353D57CF590).init(layoutContext: SwiftUI.SizeAndSpacingContext, proxies: SwiftUI.LayoutProxyCollection, majorAxis: SwiftUI.Axis, minorAxisAlignment: SwiftUI.AlignmentKey, uniformSpacing: Swift.Optional<CoreGraphics.CGFloat>, childStorage: Swift.UnsafeMutablePointer<SwiftUI.StackLayout.(Child in _68D684484B5AEF917B6B8353D57CF590)>, capacity: Swift.Int, resizeChildrenWithTrailingOverflow: Swift.Bool) -> SwiftUI.StackLayout.(Header in _68D684484B5AEF917B6B8353D57CF590) + 414
frame #38: 0x00007fff42322ff7 SwiftUI`closure #1 (SwiftUI.StackLayout.(UnmanagedImplementation in _68D684484B5AEF917B6B8353D57CF590)) -> Swift.Bool in SwiftUI.StackLayout.(Storage in _68D684484B5AEF917B6B8353D57CF590).update(layoutContext: SwiftUI.SizeAndSpacingContext, children: SwiftUI.LayoutProxyCollection, majorAxis: SwiftUI.Axis, minorAxisAlignment: SwiftUI.AlignmentKey, uniformSpacing: Swift.Optional<CoreGraphics.CGFloat>) -> Swift.Bool + 167
frame #39: 0x00007fff4232259f SwiftUI`function signature specialization <Arg[0] = [Closure Propagated : closure #1 (SwiftUI.StackLayout.(UnmanagedImplementation in _68D684484B5AEF917B6B8353D57CF590)) -> Swift.Bool in SwiftUI.StackLayout.(Storage in _68D684484B5AEF917B6B8353D57CF590).update(layoutContext: SwiftUI.SizeAndSpacingContext, children: SwiftUI.LayoutProxyCollection, majorAxis: SwiftUI.Axis, minorAxisAlignment: SwiftUI.AlignmentKey, uniformSpacing: Swift.Optional<CoreGraphics.CGFloat>) -> Swift.Bool, Argument Types : [SwiftUI.LayoutProxyCollectionSwiftUI.SizeAndSpacingContextSwiftUI.AxisSwiftUI.AlignmentKeySwift.Optional<CoreGraphics.CGFloat>]> of generic specialization <Swift.Bool> of SwiftUI.StackLayout.(Storage in _68D684484B5AEF917B6B8353D57CF590).withUnmanagedImplementation<A>((SwiftUI.StackLayout.(UnmanagedImplementation in _68D684484B5AEF917B6B8353D57CF590)) -> A) -> A + 143
frame #40: 0x00007fff41f32bb9 SwiftUI`merged generic specialization <SwiftUI._HStackLayout, SwiftUI.(StaticLayoutComputer in _B0B50B213A0802E1084335D0AD6CD036)<SwiftUI._HStackLayout>> of closure #1 (SwiftUI.StackLayout.(Storage in _68D684484B5AEF917B6B8353D57CF590)) -> Swift.Bool in (extension in SwiftUI):SwiftUI.HVStack.updateLayoutComputer<A where A1: AttributeGraph.StatefulRule, A1.Value == SwiftUI.LayoutComputer>(rule: inout A1, layoutContext: SwiftUI.SizeAndSpacingContext, children: SwiftUI.LayoutProxyCollection) -> () + 105
frame #41: 0x00007fff41fb5405 SwiftUI`merged generic not re-abstracted specialization <SwiftUI._HStackLayout, SwiftUI.(StaticLayoutComputer in _B0B50B213A0802E1084335D0AD6CD036)<SwiftUI._HStackLayout>> of closure #1 (SwiftUI.StackLayout.(Storage in _68D684484B5AEF917B6B8353D57CF590)) -> Swift.Bool in (extension in SwiftUI):SwiftUI.HVStack.updateLayoutComputer<A where A1: AttributeGraph.StatefulRule, A1.Value == SwiftUI.LayoutComputer>(rule: inout A1, layoutContext: SwiftUI.SizeAndSpacingContext, children: SwiftUI.LayoutProxyCollection) -> () + 37
frame #42: 0x00007fff41fc3f16 SwiftUI`merged partial apply forwarder for generic not re-abstracted specialization <SwiftUI._VStackLayout, SwiftUI.(StaticLayoutComputer in _B0B50B213A0802E1084335D0AD6CD036)<SwiftUI._VStackLayout>> of closure #1 (SwiftUI.StackLayout.(Storage in _68D684484B5AEF917B6B8353D57CF590)) -> Swift.Bool in (extension in SwiftUI):SwiftUI.HVStack.updateLayoutComputer<A where A1: AttributeGraph.StatefulRule, A1.Value == SwiftUI.LayoutComputer>(rule: inout A1, layoutContext: SwiftUI.SizeAndSpacingContext, children: SwiftUI.LayoutProxyCollection) -> () + 38
frame #43: 0x00007fff41ed57f9 SwiftUI`generic specialization <SwiftUI.StackLayout.(Storage in _68D684484B5AEF917B6B8353D57CF590), SwiftUI.(StaticLayoutComputer in _B0B50B213A0802E1084335D0AD6CD036)<SwiftUI._FormVStackLayout>> of static (extension in SwiftUI):SwiftUI.LayoutComputerDelegate.update<A where A1: AttributeGraph.StatefulRule, A1.Value == SwiftUI.LayoutComputer>(_: inout A1, maybeInPlace: (A) -> Swift.Bool, create: () -> A) -> () + 105
frame #44: 0x00007fff41e911f0 SwiftUI`merged generic specialization <SwiftUI.(StaticLayoutComputer in _B0B50B213A0802E1084335D0AD6CD036)<SwiftUI._HStackLayout>, SwiftUI._HStackLayout> of (extension in SwiftUI):AttributeGraph.StatefulRule< where A.Value == SwiftUI.LayoutComputer>.updateLayoutComputer<A where A1: SwiftUI._Layout>(layout: A1, environment: AttributeGraph.Attribute<SwiftUI.EnvironmentValues>, layoutComputers: Swift.Array<AttributeGraph.OptionalAttribute<SwiftUI.LayoutComputer>>) -> () + 176
frame #45: 0x00007fff41fad9a3 SwiftUI`merged generic specialization <SwiftUI.LayoutComputer, SwiftUI.(StaticLayoutComputer in _B0B50B213A0802E1084335D0AD6CD036)<SwiftUI._HStackLayout>> of implicit closure #2 (Swift.UnsafeMutableRawPointer, __C.AGAttribute) -> () in implicit closure #1 (A1.Type) -> (Swift.UnsafeMutableRawPointer, __C.AGAttribute) -> () in closure #1 () -> (Swift.UnsafeMutableRawPointer, __C.AGAttribute) -> () in closure #1 (Swift.UnsafePointer<A1>) -> AttributeGraph.Attribute<A> in AttributeGraph.Attribute.init<A where A == A1.Value, A1: AttributeGraph.StatefulRule>(A1) -> AttributeGraph.Attribute<A> + 115
frame #46: 0x00007fff41fbcc32 SwiftUI`partial apply forwarder for generic specialization <SwiftUI.LayoutComputer, SwiftUI.(StaticLayoutComputer in _B0B50B213A0802E1084335D0AD6CD036)<SwiftUI._VStackLayout>> of implicit closure #2 (Swift.UnsafeMutableRawPointer, __C.AGAttribute) -> () in implicit closure #1 (A1.Type) -> (Swift.UnsafeMutableRawPointer, __C.AGAttribute) -> () in closure #1 () -> (Swift.UnsafeMutableRawPointer, __C.AGAttribute) -> () in closure #1 (Swift.UnsafePointer<A1>) -> AttributeGraph.Attribute<A> in AttributeGraph.Attribute.init<A where A == A1.Value, A1: AttributeGraph.StatefulRule>(A1) -> AttributeGraph.Attribute<A> + 34
frame #47: 0x00007fff4250417f AttributeGraph`AG::Graph::UpdateStack::update() + 505
frame #48: 0x00007fff42504608 AttributeGraph`AG::Graph::update_attribute(AG::data::ptr<AG::Node>, bool) + 322
frame #49: 0x00007fff4250c8f3 AttributeGraph`AG::Subgraph::update(unsigned int) + 781
frame #50: 0x00007fff422f3b6a SwiftUI`SwiftUI.GraphHost.runTransaction() -> () + 186
frame #51: 0x00007fff422f50af SwiftUI`SwiftUI.GraphHost.(runTransaction in _30C09FF16BC95EC5173809B57186CAC3)(SwiftUI.(AsyncTransaction in _30C09FF16BC95EC5173809B57186CAC3)) -> () + 79
frame #52: 0x00007fff422f43a9 SwiftUI`SwiftUI.GraphHost.flushTransactions() -> () + 217
frame #53: 0x00007fff422f504f SwiftUI`closure #1 (SwiftUI.GraphHost) -> () in closure #1 () -> () in SwiftUI.GraphHost.asyncTransaction<A where A: SwiftUI.GraphMutation>(_: SwiftUI.Transaction, mutation: A, style: SwiftUI._GraphMutation_Style) -> () + 15
frame #54: 0x00007fff422f4c19 SwiftUI`function signature specialization <Arg[2] = [Constant Propagated Function : closure #1 (SwiftUI.GraphHost) -> () in closure #1 () -> () in SwiftUI.GraphHost.asyncTransaction<A where A: SwiftUI.GraphMutation>(_: SwiftUI.Transaction, mutation: A, style: SwiftUI._GraphMutation_Style) -> ()]> of reabstraction thunk helper from @callee_guaranteed (@guaranteed SwiftUI.GraphHost) -> () to @escaping @callee_guaranteed (@guaranteed SwiftUI.GraphHost) -> (@out ()) + 9
frame #55: 0x00007fff41ba91a1 SwiftUI`partial apply forwarder for closure #1 (SwiftUI.ViewGraph) -> A1 in (extension in SwiftUI):SwiftUI.ViewGraphDelegate.updateGraph<A>(body: (SwiftUI.GraphHost) -> A1) -> A1 + 17
frame #56: 0x00007fff421b05ea SwiftUI`closure #1 () -> A1 in (extension in SwiftUI):SwiftUI.ViewRendererHost.updateViewGraph<A>(body: (SwiftUI.ViewGraph) -> A1) -> A1 + 74
frame #57: 0x00007fff421ae849 SwiftUI`(extension in SwiftUI):SwiftUI.ViewRendererHost.updateViewGraph<A>(body: (SwiftUI.ViewGraph) -> A1) -> A1 + 73
frame #58: 0x00007fff421ba2d9 SwiftUI`protocol witness for SwiftUI.ViewGraphDelegate.updateViewGraph<A>(body: (SwiftUI.ViewGraph) -> A1) -> A1 in conformance SwiftUI.NSHostingView<A1> : SwiftUI.ViewGraphDelegate in SwiftUI + 25
frame #59: 0x00007fff41ba4f27 SwiftUI`(extension in SwiftUI):SwiftUI.ViewGraphDelegate.updateGraph<A>(body: (SwiftUI.GraphHost) -> A1) -> A1 + 55
frame #60: 0x00007fff41ba9149 SwiftUI`protocol witness for SwiftUI.GraphDelegate.updateGraph<A>(body: (SwiftUI.GraphHost) -> A1) -> A1 in conformance SwiftUI.NSHostingView<A1> : SwiftUI.GraphDelegate in SwiftUI + 25
frame #61: 0x00007fff422f502a SwiftUI`merged closure #1 () -> () in SwiftUI.GraphHost.init(data: SwiftUI.GraphHost.Data) -> SwiftUI.GraphHost + 122
frame #62: 0x00007fff41baab8c SwiftUI`reabstraction thunk helper from @escaping @callee_guaranteed () -> () to @escaping @callee_guaranteed () -> (@out ()) + 12
frame #63: 0x00007fff4220a5d1 SwiftUI`partial apply forwarder for reabstraction thunk helper from @escaping @callee_guaranteed () -> () to @escaping @callee_guaranteed () -> (@out ()) + 17
frame #64: 0x00007fff42208266 SwiftUI`static (extension in SwiftUI):__C.NSRunLoop.flushObservers() -> () + 118
frame #65: 0x00007fff4220a519 SwiftUI`closure #1 () -> () in closure #1 (Swift.Optional<__C.CFRunLoopObserverRef>, __C.CFRunLoopActivity, Swift.Optional<Swift.UnsafeMutableRawPointer>) -> () in static (extension in SwiftUI):__C.NSRunLoop.addObserver(() -> ()) -> () + 9
frame #66: 0x00007fff4220597e SwiftUI`function signature specialization <Arg[1] = [Constant Propagated Function : closure #1 () -> () in closure #1 (Swift.Optional<__C.CFRunLoopObserverRef>, __C.CFRunLoopActivity, Swift.Optional<Swift.UnsafeMutableRawPointer>) -> () in static (extension in SwiftUI):__C.NSRunLoop.addObserver(() -> ()) -> ()]> of reabstraction thunk helper from @callee_guaranteed () -> (@error @owned Swift.Error) to @escaping @callee_guaranteed () -> (@out (), @error @owned Swift.Error) + 14
frame #67: 0x00007fff33592d9e libswiftObjectiveC.dylib`ObjectiveC.autoreleasepool<A>(invoking: () throws -> A) throws -> A + 46
frame #68: 0x00007fff4220a503 SwiftUI`closure #1 (Swift.Optional<__C.CFRunLoopObserverRef>, __C.CFRunLoopActivity, Swift.Optional<Swift.UnsafeMutableRawPointer>) -> () in static (extension in SwiftUI):__C.NSRunLoop.addObserver(() -> ()) -> () + 35
frame #69: 0x00007fff4220a54b SwiftUI`@objc closure #1 (Swift.Optional<__C.CFRunLoopObserverRef>, __C.CFRunLoopActivity, Swift.Optional<Swift.UnsafeMutableRawPointer>) -> () in static (extension in SwiftUI):__C.NSRunLoop.addObserver(() -> ()) -> () + 43
frame #70: 0x00007fff2040cd9d CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
frame #71: 0x00007fff2040cc2d CoreFoundation`__CFRunLoopDoObservers + 549
frame #72: 0x00007fff2040b736 CoreFoundation`CFRunLoopRunSpecific + 683
frame #73: 0x00007fff28677fd0 HIToolbox`RunCurrentEventLoopInMode + 292
frame #74: 0x00007fff28677c22 HIToolbox`ReceiveNextEventCommon + 283
frame #75: 0x00007fff28677aef HIToolbox`_BlockUntilNextEventMatchingListInModeWithFilter + 64
frame #76: 0x00007fff22c24f85 AppKit`_DPSNextEvent + 883
frame #77: 0x00007fff22c2374b AppKit`-[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1366
frame #78: 0x00007fff22c15bda AppKit`-[NSApplication run] + 586
frame #79: 0x00007fff22be9f31 AppKit`NSApplicationMain + 816
* frame #80: 0x0000000109bd27fd MusesEffecter`main at AppDelegate.swift:13:7
frame #81: 0x00007fff20330631 libdyld.dylib`start + 1
Not crash every time, but the probability is very high, crash both on Debug or Release.
Does anyone have any idea how to locate the trouble code？
This crash seems related to Picker in SwiftUI My code is very similar to the code in this bug reports http://openradar.appspot.com/7385870