back was called on the only open frame of a stack — its root, reached by
an inner tab that replaced it. No recording shows what the app does there,
and a stack with no frames cannot be restored (a kept tab would have
nothing to switch back to), so the call is refused and the stack is left as
it was rather than becoming empty.
backwas called on the only open frame of a stack — its root, reached by an inner tab that replaced it. No recording shows what the app does there, and a stack with no frames cannot be restored (a kept tab would have nothing to switch back to), so the call is refused and the stack is left as it was rather than becoming empty.