Xcode11.4でビルドすると32bit iPhoneでクラッシュするサンプルコード

AppDelegate.swift

import UIKit

protocol P {
    init()
}
struct AAA : P {
}
struct BBB<T: P> {
        
    let a : Int = 0
    let b : Int = 0
    let c : Int = 0
    let d : Int = 0
    
    let e: T = T.init()
    
    let f: Int = 0
    let g: Int = 0
    let h: Int = 0
    let i: Int = 0
}

public func crash() {
    let d : BBB<AAA> = BBB()
    print("\(d)")
}

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        
        crash()
        return true
    }


}