`Default export of the module has or is using private name` type error when using latest alpha + declaration: true

[vidarc]

import { createSlice } from "@reduxjs/toolkit";

export default createSlice({
  name: "hello",
  initialState: {},
  reducers: (create) => ({
    somePreparedReducer: create.preparedReducer(
      (state: string) => {
        return { payload: { state } };
      },
      (state, action) => {
        state = { something: action.payload };
      }
    ),
  }),
});

with a tsconfig of

{
  "compilerOptions": {
    "declaration": true
  }
}

produces the following two errors

Default export of the module has or is using private name 'ReducerType'.ts(4082)
Default export of the module has or is using private name 'reducerDefinitionType'.ts(4082)

With declaration set to false, the error goes away, but that isn't workable since I am writing a library.

[markerikson]

Can you put together a repo that shows this happening?

[markerikson]

btw as a side note, state = { something: action.payload }; is a no-op and won't update anything:

https://redux-toolkit.js.org/usage/immer-reducers#resetting-and-replacing-state

[vidarc]

https://github.com/vidarc/redux-typescript-repro