Xcode 12 crashing native simulator widgets

I'm experiencing crashes on my Simulator when I build and run apps using Xcode 12 and iOS 14 Simulators. Probably it crashes when Simulator's OS boots.

I get alert dialogs of possibly uncaught exceptions. Many things are crashing:
  • NewsToday2 quit unexpectedly

  • NewsTag quit unexpectedly

  • CalendarWidgetExtension quit unexpectedly

and so on...

I think there aren't more instances like that in the Forum because it fails silently for most people. But if you try to see the correspondent widgets they are all a black rectangle in the widgets screen.

To see those alerts you need the CrashReporterPrefs.app that can be found inside Additional Tools for Xcode 12 at the official developers download page

Set it as Developer and the check the Display alert dialog for uncaught exceptions.

I don't see the direct impact of it in my app, besides an infinite auto-layout loop that I don't think has any relation with those crashes.

But I wonder, what is causing the crashes?
Check out some of the other threads. People have been howling about this one.

You can get fewer crashes by downloading one of the older iOS simulators, e.g., 13.5. You'll still get crashes when closing the simulator, but less at startup. However, you'll need Xcode 12.0. Xcode 12.0.1 has a bug where it no longer shows any of the simulators for download.

Xcode 12 crashing native simulator widgets
 
 
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