In SwiftUI.View body, accidentally put `padding()` (all by itself, no dot in front): it compiles fine, but preview doesn't work/run show blank screen or crash

The fact that SwiftUI is using function builders might complicate things and make it harder to use @warn_unqualified_access on SwiftUI view modifiers. @Douglas_Gregor should be able to provide more insight on the effect of function builders on @warn_unqualified_access.