Hi and thanks for your answer, yes the targets are 13.4 min and it occurs on both device and simulator. it happens right away, while splash screen is still visible and I don't have any chauffeur.swift or .xib. It is UIKit lifecycle, nothing special. And yes, first thing I try to hard clean the project ;-)

 iOS 14.x (any subversion), same for 13. I can't go below 13.4 because I use some methods that are available only starting with 13.4 So basically, any 13 version crashes, all 14 versions work...

Found it : I had an SPM package that used StateObject. However, this package requires iOS14 minimum and my project targeted iOS 13.4, weird :-/ Anyway, thanks for your help ;-)

I think I found the origin of this behavior : I recently changed my internet provider and it seems the network isn't stable. If I switch to iPhone shared network, it works like a charm. So my question now would be : how can I make sure that my internet connection is stable enough for Xcode ? Is there any settings I can play with to stabilize it? Thanks.

Same here, I thought I was going nuts :D

Thanks for your answer Claude31. For various reasons being : I need to send to the server the display area before even beginning to load a view That will not give me the insets for all orientation Besides, I can use the UIApplication.shared.windows.first?.safeAreaInsets to get the same result I guess ;-)

FYI, I tried with appearance, but safeAreaInsets are .zero and safeAreaLayoutGuide is still nil, that's a shame :-/      let appearance = UICollectionView.appearance(for: self.traitCollection,                            whenContainedInInstancesOf: [UIViewController.self, UINavigationController.self])     print(" \(appearance.safeAreaInsets) - \(appearance.safeAreaLayoutGuide)")

Thanks to all of you for these answers and support, I appreciate ;-)

Interesting fact : if I use a trigger, it does not crash. Is a use a timer that flips a boolean trigger to mimic a loop, it does not crash either (just edited the POST)

Thanks for your answers, glad I'm not the only one :D I hope Eskimo will have a look at it and file a radar, I do not find out to file these now :-/