Xcode 13.2 Instantiating CLLocationButton crashes in Simulator

After removing references to the code that you don't supply...
...and tweaking what remains, this works for me:

private func setupUserLocationButton() {
        let button = CLLocationButton()
        button.icon = .arrowOutline
        button.label = .none
        button.cornerRadius = 25.0
        button.addTarget(self, action: #selector(userLocationButtonTapped), for: .touchUpInside)
        view.addSubview(button)
        // setting up constraints for CLLocationButton to be on the top right corner
        button.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            button.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 16.0),
            button.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor, constant: -16.0)
        ])
    }

Maybe take it from there, and re-add your customizations, one-by-one?

Xcode 13.2 (13C90)
(From the Developer website, not the broken App Store version 13.2)

Thank you for your fast response.

The code I didn't supply was:

private var userLocationButton: CLLocationButton!

the setupUserLocationButton func is called in viewDidLoad

Style.CornerRadius.double is CGFloat = 10.0 and the themeColor is a dark blue

I'm also using Xcode 13.2 (13C90) from the Developer website (never using the App Store version)

with your exact code and assigning "userLocationButton = button", it still crashes when run in the Simulator with:

*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid parameter not satisfying: width && height'

terminating with uncaught exception of type NSException

CoreSimulator 783.5 - Device: iPhone 13 () - Runtime: iOS 15.2 (19C51) - DeviceType: iPhone 13

there is no storyboard or xib involved

So why are you declaring it like this?

private var userLocationButton: CLLocationButton!

Rather than (say):

private let userLocationButton = CLLocationButton()

...and then set up userLocationButton, rather than bothering with a separate "let button = CLLocationButton()"

Alternatively...

I tried setting up a new project with your Code above and everything just works fine

So just use that code?

So why are you declaring it like this?

This is actually a good question. I've changed it to your suggestion, but it still crashes in the line where it gets instantiated..

So just use that code?

Using your code works fine in a completely fresh project, but in my project it still crashes where it gets instantiated, no matter if using your or my code..

Just a quick answer before I post a long one: I also stumbled upon this problem, and I managed to create a Minimal Reproductible Example. I'm going to create a GitHub repository with information and all, but basically the steps are:

(Running XCode Version 13.2.1 (13C100))

1. Create a fresh SwiftUI app
2. Edit the main App to match

   import SwiftUI
   import CoreLocationUI
    
   @main
   struct CLLocationButtonTesterApp: App {
   	var body: some Scene {
   		WindowGroup {
   			LocationButton(action: {})
   		}
   	}
   }

3. Run the app → no problem
4. Create an empty file
5. Add French localization to the app
6. Add French localization to the file (you can even remove any other *.lproj folder)
7. Run the app → you get

   Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid parameter not satisfying: width && height'
   terminating with uncaught exception of type NSException
   CoreSimulator 783.5 - Device: iPhone 13 (B8BF9672-9A4F-4E59-83EC-4844992B74C4) - Runtime: iOS 15.2 (19C51) - DeviceType: iPhone 13

Tip: Clean the build folder between each test, otherwise you might encounter caching issues 😉