Since my github issue was mysteriously and unceremoniously deleted, I think that was a clue I should seek help elsewhere. I am running Oreo on a Google Pixel. This snack causes Expo to crash rather than gracefully display an error.
In a nutshell, create a View that uses a StyleSheet. In the stylesheet, when ‘padding’ or its top/bottom/etc counterparts are set to a string instead of a number, the Expo app crashes.