swift - Crash when assigning items to a UITabBar -

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if put exception breakpoint (all exceptions) in xcode, breaks on tabbar.items strange reason. 

func application(_ application: uiapplication, didfinishlaunchingwithoptions launchoptions: [uiapplicationlaunchoptionskey: any]?) -> bool {      let tabbar = uitabbar()     let item = uitabbaritem(title: "", image: uiimage(), selectedimage: uiimage())     tabbar.items = [item]  // --- breaks here     return true }

however, if create empty project , put same lines, won't crash. figure must project.

how debug this?

enter image description here





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