huwr

public extension Publisher {

    /// A variation on [share()](https://developer.apple.com/documentation/combine/publisher/3204754-share)
    /// that allows for buffering and replaying a single event to future subscribers.
    ///
    /// - Parameter initialValue: The initial value of the buffer, if none has been emitted before.
    /// - Returns: A publisher that replays the event to future subscribers.
    func shareReplayOnce(initialValue: Output) -> Publishers.Autoconnect<Publishers.Multicast<Self, CurrentValueSubject<Output, Failure>>> {
        multicast { CurrentValueSubject(initialValue) }
            .autoconnect()

huwr

import SwiftUI

/* 
   In Xcode 14.3 RC1, running against iOS 16.4:

   When you run this app, the first and second screens show fine. When you tap the last "Third Presentation" button, the last
   screen should slide on.

   For some reason, if you have the last few lines uncommented (the ones which mention SFSafariViewController, when you 
   tap the "Third Presentation" button, the app locks up and the CPU goes to 100%.