• BREAKING: feat: introduce BlocOverrides API (#2932)
  • Bloc.observer removed in favor of BlocOverrides.runZoned and BlocOverrides.current.blocObserver
  • Bloc.transformer removed in favor of BlocOverrides.runZoned and BlocOverrides.current.eventTransformer
• BREAKING: refactor: make BlocObserver an abstract class
• BREAKING: feat: add throws StateError when bloc is closed (#2912)
• BREAKING: feat: emit throws StateError when bloc is closed (#2913)
• BREAKING: feat: improve error handling/reporting
  • BlocUnhandledErrorException is removed
  • Uncaught exceptions are always reported to onError and rethrown
  • addError reports error to onError but does not propagate as an uncaught exception
• BREAKING: feat: restrict scope of emit in Bloc and Cubit
  • In Cubit, emit is protected so it can only be used within the Cubit instance.
  • In Bloc, emit is internal so it cannot be used outside of the internal package implementation.
• BREAKING: refactor: remove deprecated TransitionFunction
• BREAKING: refactor: remove deprecated transformEvents
• BREAKING: refactor: remove deprecated mapEventToState
• BREAKING: refactor: remove deprecated transformTransitions
• BREAKING: refactor: remove deprecated listen on BlocBase
• feat: throw StateError if an event is added without a registered event handler