I have the wildest "SwiftUI Previews crash" bug. I am really consistently getting "does not respond to selector" crashes for basic Foundation types that are accessed one way or another in my `main()` (also `@main`). Like if I try to call `FileHandle(forWritingToURL:)`, I'm getting a crash for NSFileHandle not responding to +fileHandleForWriting:error:. Something is breaking Foundation (or maybe Swift/Foundation bridging?) I don't know what this is. Fine outside Previews. Crashes inside.