在环境对象中使用@Published和协议时，我得到EXC_BAD_ACCESS

Question

我在环境对象符合定义了需要发布的变量的协议的视图中使用@EnvironmentObject。 当MyView在单独的文件中时，发生崩溃。当所有代码都在SceneDelegate文件中时，不会发生崩溃。有人可以确认相同的行为吗？这种行为是非常意外的。

有人知道如何解决此问题吗？

此代码重现了问题：

//MyView.swift
import SwiftUI    
import Combine

struct MyView: View {
    @EnvironmentObject var viewModel: MyViewModel

    var body: some View {
        VStack {
            if self.viewModel.someText == nil { //<--Thread 1: EXC_BAD_ACCESS
                Text("nil")
            } else {
                Text("not nil")
            }
        }
    }
}


//SceneDelegate.swift
import SwiftUI    
import Combine 

class MyViewModel: ObservableObject & HasText {
    @Published var someText: String?
    var someTextPublished: Published<String?> { _someText }
    var someTextPublisher: Published<String?>.Publisher { $someText }

    init() {}   
}

protocol HasText: AnyObject {
    var someText: String? { get set }
    var someTextPublished: Published<String?> { get }
    var someTextPublisher: Published<String?>.Publisher { get }
}

func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {

    let viewModel = MyViewModel()
    let contentView = MyView().environmentObject(viewModel)

    if let windowScene = scene as? UIWindowScene {
        let window = UIWindow(windowScene: windowScene)
        window.rootViewController = UIHostingController(rootView: contentView)
        self.window = window
        window.makeKeyAndVisible()
    }
}