Recently, we are testing our app on iOS 17, and found a weird crash that occurred on iOS 17, not on iOS 16 and below. Here's the stack: the sha512 is a function we wrote for the String extension: public extension String { var sha512: String? { return self.data(using: .utf8).map { NSData(data: $0).sha512() } } } We cannot find any mistake from the code above, and the code works well on iOS 16 and below (packaged by Xcode 14.2). And it also works on: iOS 17 simulator running from Xcode 14.2. iOS 17 simulator running from Xcode 15 Beta 4. iOS 17 beta 3/4 real device running from Xcode 15 Beta 4 (debug). It doesn't works on: packaged by Xcode 14.2 and running on iOS 17 beta real device. not tested: packaged by Xcode 15 Beta and running on iOS 17 beta real device. Is that an iOS 17 bug? Or anyone may know how to fix that? I will very appreciate your advice, thank you.