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Why does a second @State variable crash my program in SwiftUI

import SwiftUI
import CoreData


struct AddTaskView: View {
    
    @Environment(\.managedObjectContext) private var viewContext
    @Environment(\.presentationMode) var presentationMode
    
    @FetchRequest(entity: Task.entity(), sortDescriptors: [])
    var tasks: FetchedResults<Task>
    
    @FetchRequest(entity: DailyScore.entity(), sortDescriptors: [NSSortDescriptor(key: "date", ascending: false)])
    var scores: FetchedResults<DailyScore>
    
    let types = ["Exercise", "German", "Cold Shower", "Fast Food"]
    
    @State var selectedTaskIndex = 0
    @State var newType = ""
    
    var body: some View {

I can't figure out why @State var newType = "" causes the program to crash. (and it is independent of usage, so that is irrelevant as far as I'm aware)

更新:这似乎只是一个 Xcode 错误。

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