Hi,

I am trying to run the playground for trait based view, and I'm getting the following error:
error: Execution was interrupted, reason: signal SIGABRT.
The process has been left at the point where it was interrupted, use "thread return -x" to return to the state before expression evaluation.

libc++abi.dylib: terminating with uncaught exception of type NSException

in the following assignement.
PlaygroundPage.current.liveView = playgroundController(
  for: MyViewController(),
  device: .phone4_7inch,
  orientation: .portrait,
  traits: .init(preferredContentSizeCategory: .medium)
)

I am using Xcode Version 10.1 (10B61)