Why does this code crash at runtime? It is just a picker in a SwiftUI in a tabbed view

Question

Just a simple Tabbed App xcodeproj in SwiftUI.

Add a picker like this aaand: crash at runtime when switching to second tab.

import SwiftUI

struct ContentView : View {
    @State private var selection = 0
    @State private var pickerselection = 3
    let numbers = ["1", "2", "3", "4", "5"]
    var aTitle: String = "Title"

    var body: some View {
        TabbedView(selection: $selection) {
// ADD ONLY THIS PART TO A NEW TABBED APP SWIFTUI PROJECT //// BEGIN /////
            VStack{

                Text("First View")
                    .font(.title)

                Picker(selection: $pickerselection, label:
                Text(aTitle)) {
                    ForEach(0 ..< numbers.count) { index in
                        Text(self.numbers[index]).tag(index)
                    }
                }
                }

////// XCODE 11.0 BETA 2 ONLY//////// END ////////////
            .tabItemLabel(Image("first"))
            .tag(0)

            Text("Second View")
                .font(.title)
                .tabItemLabel(Image("second"))
                .tag(1)
        }
    }
}

#if DEBUG
struct ContentView_Previews : PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}
#endif

Compiles, but runtime crash when switching tabs:

Thread 1: EXC_BAD_ACCESS (code=1, address=0x8)

Answer 1

Problem seems solved in XCode 11 beta 5.