SwiftUI 因一位用户的 EXC_BREAKPOINT (SIGTRAP) 而崩溃，我无法在模拟器中复制它
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【中文标题】SwiftUI 因一位用户的 EXC_BREAKPOINT (SIGTRAP) 而崩溃，我无法在模拟器中复制它【英文标题】：SwiftUI crashing with EXC_BREAKPOINT (SIGTRAP) for one user and I can't replicate it in simulator 【发布时间】：2020-05-13 16:20:05 【问题描述】：今年我自学了编码，终于开始通过 TestFlight 与一些朋友分享我的应用程序。我的一位朋友无法在应用程序中点击任何内容而不会崩溃，但我似乎无法在模拟器中复制该问题。这是崩溃日志：
Incident Identifier: 9C5CBC92-D799-4EF7-A0BD-B3D38BDFCD6A
Beta Identifier: 14981E01-C6E4-4340-A6C2-2C7730C5F39F
Hardware Model: iPhone9,3
Process: Skool [849]
Path: /private/var/containers/Bundle/Application/CD824E3B-BB88-47D1-912E-55156C40187E/Skool.app/Skool
Identifier: com.kevinolmats.Skool
Version: 2777 (0.2.2)
AppStoreTools: 11E503a
AppVariant: 1:iPhone9,3:13
Beta: YES
Code Type: ARM-64 (Native)
Role: Foreground
Parent Process: launchd [1]
Coalition: com.kevinolmats.Skool [677]
Date/Time: 2020-05-09 10:19:43.2873 -0600
Launch Time: 2020-05-09 10:19:41.3463 -0600
OS Version: iPhone OS 13.4.1 (17E262)
Release Type: User
Baseband Version: 4.02.02
Report Version: 104
Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000001, 0x00000001becb85e0
Termination Signal: Trace/BPT trap: 5
Termination Reason: Namespace SIGNAL, Code 0x5
Terminating Process: exc handler [849]
Triggered by Thread: 0
Thread 0 name:
Thread 0 Crashed:
0 libswiftCore.dylib 0x00000001becb85e0 _assertionFailure(_:_:file:line:flags:) + 796 (AssertCommon.swift:132)
1 libswiftCore.dylib 0x00000001becb85e0 _assertionFailure(_:_:file:line:flags:) + 796 (AssertCommon.swift:132)
2 SwiftUI 0x00000001e9394268 EnvironmentObject.error() + 216 (EnvironmentObject.swift:55)
3 Skool 0x0000000104223228 CourseAssignmentsListView.body.getter + 2116 (CourseAssignmentsListView.swift:0)
4 SwiftUI 0x00000001e8ef4a40 DynamicPropertyBody.update(context:) + 1788 (CustomView.swift:110)
5 SwiftUI 0x00000001e8ef5040 protocol witness for static UntypedAttribute._update(_:graph:attribute:) in conformance DynamicPr... + 36 (<compiler-generated>:0)
6 AttributeGraph 0x00000001dd21e998 partial apply + 28 (<compiler-generated>:0)
7 AttributeGraph 0x00000001dd2079fc AG::Graph::UpdateStack::update() + 440 (ag-closure.h:104)
8 AttributeGraph 0x00000001dd207eb4 AG::Graph::update_attribute(unsigned int, bool) + 372 (ag-graph-update.cc:399)
9 AttributeGraph 0x00000001dd20b044 AG::Graph::value_ref(AG::attribute_t, AGTypeID, bool*) + 116 (ag-graph.cc:762)
10 AttributeGraph 0x00000001dd218310 AGGraphGetValue + 48 (AGGraph.mm:304)
11 SwiftUI 0x00000001e8ff59a0 ViewGraph.accessibilityNodes() + 108 (<compiler-generated>:0)
12 SwiftUI 0x00000001e93adf08 specialized _UIHostingView.enableAccessibility() + 116
13 SwiftUI 0x00000001e93a4aac specialized _UIHostingView.init(rootView:) + 2116 (UIHostingView.swift:1278)
14 SwiftUI 0x00000001e93b3dc8 specialized UIHostingController.init(rootView:) + 56 (UIHostingView.swift:0)
15 SwiftUI 0x00000001e933df74 specialized DestinationHostingController.__allocating_init(rootView:) + 56 (<compiler-generated>:0)
16 SwiftUI 0x00000001e933dd2c NavigationBridge_PhoneTV.push(_:onto:animated:) + 76 (NavigationBridge_PhoneTV.swift:84)
17 SwiftUI 0x00000001e8f83438 UIKitNavigationBridge.updatePresentedContent(_:animated:) + 204 (UIKitNavigationBridge.swift:168)
18 SwiftUI 0x00000001e8f83844 UIKitNavigationBridge.preferencesDidChange(_:) + 372 (UIKitNavigationBridge.swift:203)
19 SwiftUI 0x00000001e933d560 NavigationBridge_PhoneTV.preferencesDidChange(_:) + 44 (NavigationBridge_PhoneTV.swift:21)
20 SwiftUI 0x00000001e8f26078 _UIHostingView.preferencesDidChange() + 476 (_UIHostingView.swift:199)
21 SwiftUI 0x00000001e8ff3d74 ViewGraph.updateOutputs(at:) + 180 (ViewGraph.swift:652)
22 SwiftUI 0x00000001e92928b4 closure #1 in closure #1 in ViewRendererHost.render(interval:updateDisplayList:) + 816 (ViewRendererHost.swift:157)
23 SwiftUI 0x00000001e9291d54 closure #1 in ViewRendererHost.render(interval:updateDisplayList:) + 524 (ViewRendererHost.swift:145)
24 SwiftUI 0x00000001e9288c5c ViewRendererHost.render(interval:updateDisplayList:) + 316 (ViewRendererHost.swift:132)
25 SwiftUI 0x00000001e93aee50 _UIHostingView.displayLinkTimer(timestamp:) + 160 (UIHostingView.swift:1391)
26 SwiftUI 0x00000001e8f26344 DisplayLink.displayLinkTimer(_:) + 88 (_UIHostingView.swift:270)
27 SwiftUI 0x00000001e8f2639c @objc DisplayLink.displayLinkTimer(_:) + 40 (<compiler-generated>:0)
28 QuartzCore 0x00000001b81c0368 CA::Display::DisplayLink::dispatch_items(unsigned long long, unsigned long long, unsigned long long) + 516 (CADisplay.mm:2528)
29 IOKit 0x00000001b2751628 IODispatchCalloutFromCFMessage + 480 (IOKitLib.c:1239)
30 CoreFoundation 0x00000001b1762bc0 __CFMachPortPerform + 172 (CFMachPort.c:533)
31 CoreFoundation 0x00000001b178c200 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 56 (CFRunLoop.c:1937)
32 CoreFoundation 0x00000001b178b90c __CFRunLoopDoSource1 + 444 (CFRunLoop.c:2075)
33 CoreFoundation 0x00000001b17866c0 __CFRunLoopRun + 1888 (CFRunLoop.c:3098)
34 CoreFoundation 0x00000001b1785c34 CFRunLoopRunSpecific + 424 (CFRunLoop.c:3192)
35 GraphicsServices 0x00000001bb8cf38c GSEventRunModal + 160 (GSEvent.c:2246)
36 UIKitCore 0x00000001b58b822c UIApplicationMain + 1932 (UIApplication.m:4820)
37 Skool 0x000000010417275c main + 68 (OverdueDashboardSubview.swift:13)
38 libdyld.dylib 0x00000001b160d800 start + 4
Thread 1:
0 libsystem_pthread.dylib 0x00000001b1527738 start_wqthread + 0
Thread 2:
0 libsystem_pthread.dylib 0x00000001b1527738 start_wqthread + 0
Thread 3:
0 libsystem_pthread.dylib 0x00000001b1527738 start_wqthread + 0
Thread 4:
0 libsystem_pthread.dylib 0x00000001b1527738 start_wqthread + 0
Thread 5:
0 libsystem_pthread.dylib 0x00000001b1527738 start_wqthread + 0
Thread 6 name:
Thread 6:
0 libsystem_kernel.dylib 0x00000001b15e1198 mach_msg_trap + 8
1 libsystem_kernel.dylib 0x00000001b15e060c mach_msg + 72 (mach_msg.c:103)
2 CoreFoundation 0x00000001b178b3b4 __CFRunLoopServiceMachPort + 148 (CFRunLoop.c:2575)
3 CoreFoundation 0x00000001b17863e8 __CFRunLoopRun + 1160 (CFRunLoop.c:2931)
4 CoreFoundation 0x00000001b1785c34 CFRunLoopRunSpecific + 424 (CFRunLoop.c:3192)
5 Foundation 0x00000001b1ac8bcc -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 228 (NSRunLoop.m:374)
6 Foundation 0x00000001b1ac8aac -[NSRunLoop(NSRunLoop) runUntilDate:] + 88 (NSRunLoop.m:421)
7 UIKitCore 0x00000001b595a160 -[UIEventFetcher threadMain] + 152 (UIEventFetcher.m:736)
8 Foundation 0x00000001b1bf79d0 __NSThread__start__ + 848 (NSThread.m:724)
9 libsystem_pthread.dylib 0x00000001b1523d98 _pthread_start + 156 (pthread.c:896)
10 libsystem_pthread.dylib 0x00000001b152774c thread_start + 8
Thread 7:
0 libsystem_pthread.dylib 0x00000001b1527738 start_wqthread + 0
Thread 8:
0 libsystem_pthread.dylib 0x00000001b1527738 start_wqthread + 0
Thread 9:
0 libsystem_pthread.dylib 0x00000001b1527738 start_wqthread + 0
Thread 0 crashed with ARM Thread State (64-bit):
x0: 0x0000000105d669e0 x1: 0x00000001bef56ef8 x2: 0x0000000000000407 x3: 0x000000000000001e
x4: 0x0000000105d71c00 x5: 0x0000000000000013 x6: 0x0000000000000000 x7: 0x00000000000003f8
x8: 0x0000000105d669e8 x9: 0x0000000200000002 x10: 0xfffffffe00000000 x11: 0x0000000000000000
x12: 0x0000000000000002 x13: 0x0000000000003fff x14: 0x000000004ca45cf5 x15: 0x000000000000f0be
x16: 0x00000001b1512ffc x17: 0x0000000001000002 x18: 0x0000000000000000 x19: 0x0000000105d669e0
x20: 0x0000000000000000 x21: 0x0000000000000000 x22: 0x0000000000000000 x23: 0x00000001e94156a0
x24: 0x0000000105d669e0 x25: 0xf000000000000095 x26: 0x000000000000000b x27: 0x0000000000000002
x28: 0x00000001042c7c58 fp: 0x000000016bc906a0 lr: 0x00000001becb85e0
sp: 0x000000016bc90620 pc: 0x00000001becb85e0 cpsr: 0x60000000
esr: 0xf2000001 Address size fault
我特别关心这一行：
37 Skool 0x000000010417275c main + 68 (OverdueDashboardSubview.swift:13)
在代码中，该行是：
@FetchRequest(entity: Assignment.entity(), sortDescriptors: [NSSortDescriptor(keyPath: \Assignment.dueDate, ascending: true), NSSortDescriptor(keyPath: \Assignment.name, ascending: true)]) var assignments: FetchedResults<Assignment>
但这对我和我发送测试版的其他所有人来说都很好。崩溃日志中是否缺少某些内容？就像我说的那样，我对编码很陌生，在阅读这样的日志时甚至更新。任何想法将不胜感激！
编辑：这里是 CourseAssignmentListView 的代码：
struct CourseAssignmentsListView: View
@FetchRequest(entity: Assignment.entity(),
sortDescriptors: [NSSortDescriptor(keyPath: \Assignment.course?.name, ascending: true),
NSSortDescriptor(keyPath: \Assignment.isDue, ascending: false),
NSSortDescriptor(keyPath: \Assignment.dueDate, ascending: true),
NSSortDescriptor(keyPath: \Assignment.name, ascending: true)]) var assignments: FetchedResults<Assignment>
@EnvironmentObject var accentColor: AccentColorManager
@Environment(\.managedObjectContext) var context
@State var course: Course?
@State private var newAssignment: Assignment? = nil
@State var newAssignmentViewIsPresented = false
var body: some View
Group
if self.assignments.filter( $0.course?.name == self.course?.name ).isEmpty
Text("No Assignments")
.foregroundColor(.secondary)
.font(.largeTitle)
else
List(assignments.filter $0.course?.name == self.course?.name , id: \.self) assignment in
AssignmentRow(assignment: assignment).environment(\.managedObjectContext, self.context)
.navigationBarTitle(Text("\(course?.wrappedName ?? "")").foregroundColor(course?.color ?? Color.primary))
.navigationBarItems(
trailing: Button(
action:
self.newAssignment = Assignment(context: self.context)
self.newAssignmentViewIsPresented = true
)
Image(systemName: "plus")
.accessibility(label: Text("New Assignment"))
.font(.title)
)
.accentColor(self.accentColor.color)
.onAppear
self.accentColor.color = self.course?.color ?? .green
.sheet(isPresented: $newAssignmentViewIsPresented, content:
AssignmentEditorView(assignment: self.newAssignment!, defaultCourse: self.course).environment(\.managedObjectContext, self.context)
)
【问题讨论】：
你需要从这行添加代码 sn-ps 3 Skool 0x0000000104223228 CourseAssignmentsListView.body.getter + 2116 (CourseAssignmentsListView.swift:0) 37是起点，3是在崩溃之前。 @JohnathonKarcz 我为你添加了它！ 我在 App Store 上的一个应用程序上遇到了这个确切的崩溃。尽管它在几乎所有相同操作系统和型号的设备上都能正常工作，但数百名 2 名用户在 iPhone 11 上遇到了这种崩溃。这是一场噩梦，但我们无法解决它。 【参考方案1】：我看到了几乎相同的崩溃。 SwiftUI 似乎仍然存在一个错误，其中 @EnvironmentObject 变量在子视图中无法访问。
您是从 NavigationLink（在 NavigationView 或 List 中）还是在模式中启动您的 CourseAssignmentsListView床单？如果是这样，请尝试使用 .environmentObject 修饰符直接注入您的 AccentColorManager - 如下所示：
// In the parent view
@EnvironmentObject var accentColor: AccentColorManager
// Wherever you are loading the view from... demonstrating using `NavigationLink`
NavigationLink(CourseAssignmentsListView().environmentObject(self.accentColor))
在我的例子中，我们刚刚让两个发生崩溃的人都报告说这种方法有效。
【讨论】：
不知为何这种方法也适用于我的情况，非常相似，谢谢！ 不客气！这是一个很难追踪的，所以我很高兴它帮助了你。以上是关于SwiftUI 因一位用户的 EXC_BREAKPOINT (SIGTRAP) 而崩溃，我无法在模拟器中复制它的主要内容，如果未能解决你的问题，请参考以下文章
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