iOS 13 SwiftUI: app crashes upon launch on real device

Question

After the releases of SwiftUI and Apple’s new betas (macOS 10.15, iOS 13, and Xcode 11), I began developing an application built on the new technologies.

Development had

Answer 1

Thanks to matt!

It turns out the issue was just a bug in Xcode 11 beta 1, preventing SwiftUI-based apps from being testing on real devices. Upgrading to Xcode 11 beta 2 resolved the issue.