Using 'ionic generate tabs' produces invalid ngModule with tab

Description:
ionic generate tabs issue

When we generate tabs, the main tab module contains also dependency after the first tab. It generates Angular error because one Angular component cannot be used in two different modules with the same name.

Here is the code for tabs page with not needed reference to FirstPage component

import { NgModule } from '@angular/core';
import { IonicPageModule } from 'ionic-angular';
import { TabyPage } from './taby';
import { FirstPage } from '../first/first';

@NgModule({
  declarations: [
    TabyPage,
    FirstPage, // this component should NOT be here
  ],
  imports: [
    IonicPageModule.forChild(TabyPage),
  ]
})
export class TabyPageModule {}

My ionic info:

global packages:

@ionic/cli-utils : 1.4.0
Ionic CLI        : 3.4.0

local packages:

@ionic/app-scripts              : 1.3.7
@ionic/cli-plugin-ionic-angular : 1.3.0
Ionic Framework                 : ionic-angular 3.3.0

System:

Node       : v6.9.5
OS         : Linux 4.4
Xcode      : not installed
ios-deploy : not installed
ios-sim    : not installed
npm        : 3.10.10 

首先使用 ionic generate tabs 入口重現此問題，並檢查報告中所示的產生之分頁頁面模組。追蹤負責該模組的產生器，並確認輸出不再宣告 FirstPage；確認產生的 Angular 專案能在沒有所回報的重複元件錯誤的情況下建置。