Jetpack Compose release version: 1.0.0-beta04
Android Studio Build: 7.0.0-alpha14

Steps to Reproduce:

Create a composable containing a BackHandler composable.
Try to render the composable in the IDE preview with an @Preview composable.

The preview will throw an exception about there not being any BackDispatcher available.

Because there isn't any back button in the IDE preview, and most previewed composables probably don't care about navigation anyway, I would expect BackHandler to just silently no-op in this case.