【报Bug】百度小程序 tabbar 点击时，开发者工具控制台 onTabItemTap 报错

示例代码：

"tabBar": {  
        "color": "#333333",  
        "selectedColor": "#468AF7",  
        "borderStyle": "#FAFAFA",  
        "backgroundColor": "#ffffff",  
        "height": "50px",  
        "list": [  
            {  
                "pagePath": "pages/index/index",  
                "iconPath": "static/icons/tabbar/home.png",  
                "selectedIconPath": "static/icons/tabbar/home.png",  
                "text": "首页"  
            },  
            {  
                "pagePath": "pages/search/search",  
                "iconPath": "static/icons/tabbar/search.png",  
                "selectedIconPath": "static/icons/tabbar/search.png",  
                "text": "查询"  
            },  
            {  
                "pagePath": "pages/notice/notice",  
                "iconPath": "static/icons/tabbar/notice.png",  
                "selectedIconPath": "static/icons/tabbar/notice.png",  
                "text": "公告"  
            },  
            {  
                "pagePath": "pages/mine/mine",  
                "iconPath": "static/icons/tabbar/mine.png",  
                "selectedIconPath": "static/icons/tabbar/mine.png",  
                "text": "我的"  
            }  
        ]  
    }

操作步骤：

声明如上 tabbar ,问题必现

预期结果：

控制台不报错，可正常使用 onTabItemChange 方法

实际结果：

控制台报错，[Lifecycle Fail] call Page.onTabItemTap method fail:
Cannot read property 'onTabItemTap' of undefined