I'm experiencing the same issue with DVTFramework:Application Specific Information: ProductBuildVersion: 11E146 ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/DVTFrameworks/DVTFrameworks-16126/DVTUserInterfaceKit/CustomUI/DVTTableCellView.m:178 Details: Assertion failed: invalidatableObject.valid Object: Method: -_startObservingAutoProperties Thread: {number = 1, name = main} Open FDs: 46/7168I'm rely on latest Xcode version because of using latest iOS version on my test devices. Also iOS 13.4 included neccesary fixes for SwiftUI stuff I'm using. So it's not an option to downgrade Xcode.

Thanks tthomas, you are huge time saver. This workaround did the trick. I was trying to close Xcode tabs before it crashes, but without luck. Holding Shift while launching the Xcode did the trick.According to the https://support.apple.com/en-us/HT204005 here what is holding Shift for:// Or press and hold the Shift key while opening an app. // This doesn't change the setting, but the app forgets any windows // that were open the last time you quit the app.