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我是用于测试/分发的归档应用程序的新手。我的 MacOS 可可应用程序仅在构建为存档时才会崩溃。

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_INSTRUCTION (SIGILL)
Exception Codes:       0x0000000000000001, 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Illegal instruction: 4
Termination Reason:    Namespace SIGNAL, Code 0x4
Terminating Process:   exc handler [0]

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   MY.APP  0x000000010100532a specialized String._CharacterView.index(after:) + 250
1   MY.APP  0x0000000100f55ef9 specialized static TextCompletionNode.hasCommonPrefix(_:with:beyond:) + 153 (AttributeManager.swift:126)
2   MY.APP  0x0000000100f571f9 specialized TextCompletionNode.add(entry:for:) + 1161
3   MY.APP  0x0000000100f584a9 specialized closure #1 in AttributeManager.init(dataSource:loadingHandler:) + 3097
4   MY.APP  0x0000000100f5439e partial apply for closure #1 in AttributeManager.init(dataSource:loadingHandler:) + 30
5   MY.APP  0x000000010104d0a3 SearchQueryCommunicator.messageHandler(_:) + 451
6   MY.APP  0x000000010104d710 protocol witness for MessageHandler.messageHandler(_:) in conformance SearchQueryCommunicator + 16
7   MY.APP  0x000000010102ede8 Socket.handle(object:) + 456
8   MY.APP  0x0000000101031928 specialized Socket.readAvailableBytes(from:) + 1096
9   MY.APP  0x0000000101031c48 specialized Socket.stream(_:handle:) + 104 (Socket.swift:77)
10  MY.APP  0x000000010102ebff @objc Socket.stream(_:handle:) + 47
11  com.apple.CoreFoundation        0x00007fff49548dc4 _signalEventSync + 228
12  com.apple.CoreFoundation        0x00007fff49563736 _cfstream_solo_signalEventSync + 246
13  com.apple.CoreFoundation        0x00007fff49546ca4 _CFStreamSignalEvent + 484
14  com.apple.CFNetwork             0x00007fff48448a62 SocketStream::dispatchSignalFromSocketCallbackUnlocked(SocketStreamSignalHolder*) + 58
15  com.apple.CFNetwork             0x00007fff4844cff9 SocketStream::socketCallback(__CFSocket*, unsigned long, __CFData const*, void const*) + 145
16  com.apple.CFNetwork             0x00007fff4844cf2e SocketStream::_SocketCallBack_stream(__CFSocket*, unsigned long, __CFData const*, void const*, void*) + 70
17  com.apple.CoreFoundation        0x00007fff49546898 __CFSocketPerformV0 + 1016
18  com.apple.CoreFoundation        0x00007fff49527a11 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
19  com.apple.CoreFoundation        0x00007fff495e142c __CFRunLoopDoSource0 + 108
20  com.apple.CoreFoundation        0x00007fff4950a470 __CFRunLoopDoSources0 + 208
21  com.apple.CoreFoundation        0x00007fff495098ed __CFRunLoopRun + 1293
22  com.apple.CoreFoundation        0x00007fff49509153 CFRunLoopRunSpecific + 483
23  com.apple.HIToolbox             0x00007fff487f3d96 RunCurrentEventLoopInMode + 286
24  com.apple.HIToolbox             0x00007fff487f3b06 ReceiveNextEventCommon + 613
25  com.apple.HIToolbox             0x00007fff487f3884 _BlockUntilNextEventMatchingListInModeWithFilter + 64
26  com.apple.AppKit                0x00007fff46aa4a73 _DPSNextEvent + 2085
27  com.apple.AppKit                0x00007fff4723ae34 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 3044
28  com.apple.AppKit                0x00007fff46a99885 -[NSApplication run] + 764
29  com.apple.AppKit                0x00007fff46a68a72 NSApplicationMain + 804
30  MY.APP  0x0000000100f40949 main + 9 (AppDelegate.swift:12)
31  libdyld.dylib                   0x00007fff7134a015 start + 1

这是 TextCompletionNode 函数：

// we assume firstString and secondString are at least longer than beyond
private static func hasCommonPrefix(_ firstString:String, with secondString:String, beyond beyondIndex:String.Index) -> String? {
    assert((firstString.endIndex >= beyondIndex) && (secondString.endIndex >= beyondIndex))
    var commonPrefix = String(firstString[..<beyondIndex])
    guard secondString.hasPrefix(commonPrefix) else {
        return nil
    }
    var firstIndex = beyondIndex
    let firstEndIndex = firstString.endIndex
    var previousCommonPrefix: String
    repeat {
        previousCommonPrefix = commonPrefix
        if firstIndex >= firstEndIndex {
            break
        }
        //NSLog("firstString = \"\(firstString)\", firstIndex = \(firstIndex)")
        firstIndex = firstString.index(after: firstIndex) // <-- Crashing?
        commonPrefix = String(firstString[..<firstIndex])
    } while secondString.hasPrefix(commonPrefix)
    return previousCommonPrefix
}

在从 Xcode 运行应用程序时测试相同的功能时，一切都运行良好。我读过调试信息已从存档的应用程序中删除，因此您无法真正调试它们。我尝试添加一个 NSLog 语句以在控制台应用程序中写入一些调试信息，但没有显示任何内容。我还尝试从命令行（MyApp.app/Contents/MacOS/MyApp）启动应用程序，终端中也没有显示任何内容。

我想了解更多关于坠机前的情况。我应该怎么办？

编辑：我试图刷新 STDERR 甚至将 STDERR 重定向到一个基于此答案的文件中：https://stackoverflow.com/a/5938021/301189并且没有任何工作。简单地替换NSLog(_:_:)为printf(_:)帮助我在终端中获得了一些输出。我仍然不知道为什么我无法从存档应用程序中的 STDERR 获得任何东西。

此外，在终端中输出一些输出时不会发生上述崩溃。这么奇怪的bug……

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