createAsyncThunk引发错误，但未触发case rejected

const fetchUser = createAsyncThunk(
  'user/fetchUser',
  async (userId, thunkAPI) => {
    try {
      const response = await api.fetchUser(userId);
      return response.data;
    } catch (error) {
      return thunkAPI.rejectWithValue(error.message);
    }
  }
);

const userSlice = createSlice({
  name: 'user',
  initialState: { user: null, loading: false, error: null },
  reducers: {},
  extraReducers: (builder) => {
    builder
      .addCase(fetchUser.pending, (state) => {
        state.loading = true;
        state.error = null;
      })
      .addCase(fetchUser.fulfilled, (state, action) => {
        state.loading = false;
        state.user = action.payload;
      })
      .addCase(fetchUser.rejected, (state, action) => {
        state.loading = false;
        state.error = action.payload;
      });
  },
});