分段错误 Xcode 11

Question

序列化时出现分段错误'AnyArrayBox'

同时运行传递 #0 SILModuleTransform "SerializeSILPass"。
序列化时 'AnyArrayBox'（在模块 'Module' 中） 0 swift 0x000000010d7abeb3 PrintStackTraceSignalHandler(void*) + 51 1 swift 0x000000010d7ab686 SignalHandler(int) + 358 2 libsystem_platform.dylib 0x00007fff76c31b5d _sigtramp + 29

这是 AnyArray 结构

    struct AnyArray<Element>: RandomAccessCollection {

    typealias Index = Int

    private let box: AnyArrayBase<Element>

    init<Concrete: RandomAccessCollection>(_ concrete: Concrete) where Concrete.Element == Element, Concrete.Indices == Indices {
        box = AnyArrayBox(concrete)
    }

    var startIndex: Int { return box.startIndex }
    var endIndex: Int { return box.endIndex }

    func index(after i: Int) -> Int {
        return box.index(after: i)
    }

    subscript(position: Index) -> Element {
        return box[position]
    }

}

还有两个用在那里

private class AnyArrayBase<Element>: RandomAccessCollection {

    init() {
        guard type(of: self) != AnyArrayBase.self else {
            fatalError("_AnyArrayBase<Element> is an abstract class, it can not be created; create subclass instance instead")
        }
    }

    typealias Index = Int

    var startIndex: Int { fatalError("Must override") }
    var endIndex: Int { fatalError("Must override") }

    func index(after i: Int) -> Int {
        fatalError("Must override")
    }

    subscript(position: Index) -> Element {
        fatalError("Must override")
    }

}

private final class AnyArrayBox<Concrete: RandomAccessCollection>: AnyArrayBase<Concrete.Element> where Concrete.Indices == AnyArrayBase<Concrete.Element>.Indices {

    private let concrete: Concrete

    init(_ concrete: Concrete) {
        self.concrete = concrete
    }

    override var startIndex: Int { return concrete.startIndex }
    override var endIndex: Int { return concrete.endIndex }

    override func index(after i: Int) -> Int {
        return concrete.index(after: i)
    }

    override subscript(position: Index) -> Element {
        return concrete[position]
    }

}

我该如何解决？有什么建议吗？

Answer 1

我在移动到 Xcode 11.0 (11A420a) 时遇到了同样的问题它指向一行，我将元组作为结构的一部分：

var dim_values : (dim1:String?,dim2:String?,dim3:String?)

我已将其更改为另一个结构并解决了问题。

Answer 2

这有效

var dim_values : (dim1:String?,dim2:String?,dim3:String?) = (nil, nil, nil)

显然编译器需要显式初始化（为 nil）

分段错误 Xcode 11

Segmentation fault Xcode 11

swift

xcode

xcode11