EXC_BAD_INSTRUCTION on UIApplication extension force unwrap on flatMap

[revdevnick]

I find when initializing the GalleryViewController that a crash happens on line 14 in UIApplication.swift. While using flatMap there is a force unwrap which is crashing my application. This needs to be handled properly and why is this happening?

[iOS-Ashish]

@revdevnick did you find any solution?

[LeXuanKhanh]

did this bug fix yet, i use version 6.0.0 and have the same issue, i found the issues that have the same problem but the i dont understand the answer #223 https://github.com/Krisiacik/ImageViewer/issues/233

[abynim]

A workaround in two steps:

1. Add a var window: UIWindow? in AppDelegate
2. Set its value at the end of SceneDelegate's scene(_ scene: willConnectTo: options:):

if let appDelegate = UIApplication.shared.delegate as? AppDelegate {
    appDelegate.window = window
}