iOS/Swift production build崩溃，没有错误消息

Question

我经常在Firebase Crashlytics中得到崩溃(在Sentry上测试-相同)，没有任何有意义的崩溃消息。所有这些SIGABRT ABORT 0x，EXC_BREAKPOINT 0x等等。我刚接触iOS和原生开发(习惯于Android和.NET运行时，除了堆栈跟踪，大多数时候你还会收到错误信息)。我是否怀念smth，这是iOS产品构建中的常见内容吗？如果是这样的话，如何调试呢？仅仅是stacktrace和行号并不能准确地回答所发生的事情。我能期望行号至少是100%正确的吗？

通常的崩溃是这样的：

Crash: Thread #1
EXC_BREAKPOINT 0x00000001011e3d78
Crashed: Thread
0  App                            0x1011e3d78 TrackMyLocationService.determinateActivityType(withGeoCoordinate:) + 154 (TrackMyLocationService.swift:154)
1  App                            0x1011e2b70 closure #1 in TrackMyLocationService.start() (<compiler-generated>)
2  App                            0x1011c3e8c thunk for @escaping @callee_guaranteed (@guaranteed CLLocation, @unowned Bool) -> () (<compiler-generated>)
3  RxSwift                        0x1035415f0 closure #1 in ObservableType.subscribe(onNext:onError:onCompleted:onDisposed:) (<compiler-generated>)
4  RxSwift                        0x1035417f0 partial apply for closure #1 in ObservableType.subscribe(onNext:onError:onCompleted:onDisposed:) (<compiler-generated>)
5  RxSwift                        0x1034f7360 AnonymousObserver.onCore(_:) (<compiler-generated>)
6  RxSwift                        0x103544068 ObserverBase.on(_:) + 25 (ObserverBase.swift:25)
7  RxSwift                        0x1035441b8 protocol witness for ObserverType.on(_:) in conformance ObserverBase<A> (<compiler-generated>)
8  RxSwift                        0x103542bdc ObserveOnSink.run(_:_:) + 118 (ObserveOn.swift:118)
9  RxSwift                        0x103543e40 partial apply for thunk for @escaping @callee_guaranteed (@unowned @callee_guaranteed () -> ()) -> () (<compiler-generated>)
10 RxSwift                        0x103551c4c partial apply for thunk for @escaping @callee_guaranteed (@in_guaranteed A, @unowned @callee_guaranteed (@in_guaranteed A) -> ()) -> () (<compiler-generated>)
11 RxSwift                        0x103551238 closure #1 in RecursiveImmediateScheduler.schedule(_:) (<compiler-generated>)
12 App                            0x1010bc71c partial apply for thunk for @escaping @callee_guaranteed (@in_guaranteed ()) -> (@out Disposable) (<compiler-generated>)
13 App                            0x1010bc8a8 partial apply for thunk for @escaping @callee_guaranteed () -> (@out Disposable) (<compiler-generated>)
14 App                            0x1010bc71c partial apply for thunk for @escaping @callee_guaranteed (@in_guaranteed ()) -> (@out Disposable) (<compiler-generated>)
15 App                            0x1010bc8a8 partial apply for thunk for @escaping @callee_guaranteed () -> (@out Disposable) (<compiler-generated>)
16 App                            0x1010bc50c closure #1 in SingleBackgroundThreadScheduler.work() (<compiler-generated>)
17 App                            0x1010bc870 partial apply for thunk for @callee_guaranteed () -> (@error @owned Error) (<compiler-generated>)
18 libswiftObjectiveC.dylib       0x1e21f9d3c autoreleasepool<A>(invoking:) + 64
19 ???                            0x59ca81010bc424 (Missing)
20 App                            0x1010bc788 partial apply (<compiler-generated>)
21 App                            0x10127da1c thunk for @escaping @callee_guaranteed () -> () (<compiler-generated>)
22 CoreFoundation                 0x1b357549c <redacted> + 24
23 ???                            0x27df01b3fd061c (Missing)
24 ???                            0x755881b4106c54 (Missing)

Answer 1

iOS有时会有这样的错误，而.NET没有，原因是Swift和Objective-C都编译成了针对该架构的汇编。C#被编译成一个字节码，但它并不能完全在硬件上运行。有时，Swift向下编译的代码没有关联的错误消息，因为错误发生在程序集本身。

这里有更多信息：Scope of causes for EXC_BREAKPOINT crash