TypeScript: Can't use strict custom Action types any more

[sbuzonas]

Do you want to request a feature or report a bug?
Bug

What is the current behavior?
TypeScript declarations extending Action are broken because the Reducer type requires action to be AnyAction.

If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem via https://jsfiddle.net or similar.

const CALL_HISTORY_METHOD: string = "something";

interface RouterAction extends Action {
  type: typeof CALL_HISTORY_METHOD;
  payload: any;
}

interface RouterState { }

interface State {
  router: RouterState;
}

function routerReducer(state?: RouterState, action?: RouterAction): RouterState { }

const reducers: Reducer<State> = combineReducers({router: routerReducer});

What is the expected behavior?
I should be able to strictly type the action my reducer expects.

Which versions of Redux, and which browser and OS are affected by this issue? Did this work in previous versions of Redux?
This has worked since 3.4.0. (Some vague indication that 3.0.8, but no idea where the types came from prior to 3.4)

[sbuzonas]

The issue isn't in the definition here. It's in the other definition, AnyAction is more accurate to the actual behavior.

Linking DefinitelyTyped/DefinitelyTyped#17652 and DefinitelyTyped/DefinitelyTyped#18071