报错Error in nextTick: “TypeError: undefined is not iterable

Error in nextTick: “TypeError: undefined is not iterable (cannot read property Symbol(Symbol.iterator))”

父组件没有传对应的参数 找不到：

<label-template
   :image-list="checkImageList"
   :tag-list="tagList"
   @onAllFeatures="onAllFeatures"
   :active-tab="activeTab"
   @next-page="nextPage"
   @previous-page="previousPage"
 />
historicalList.length //父组件没有传list, 但子组件使用了且获取长度
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