【报Bug】uni-data-picker 的 localData为空，导致TypeError: Cannot convert undefined or null to object

示例代码：

....
load() {
if (this.readonly) {
this._processReadonly(this.localdata, this.dataValue)
return
}

            if (this.isLocaldata) {  
                this.loadData()  
                this.inputSelected = this.selected.slice(0)  
            } else if (!this.parentField && !this.selfField && this.hasValue) {  
                this.getNodeData(() => {  
                    this.inputSelected = this.selected.slice(0)  
                })  
            } else if (this.hasValue) {  
                this.getTreePath(() => {  
                    this.inputSelected = this.selected.slice(0)  
                })  
            }  
        },  

....
_extractTree(nodes, result, parent_value) {
console.log(nodes)
let list = result || []
let valueField = this.map.value
for (let i = 0; i < nodes.length; i++) {
let node = nodes[i]

    let child = {}  
    for (let key in node) {  
      if (key !== 'children') {  
        child[key] = node[key]  
      }  
    }  
    if (parent_value !== null && parent_value !== undefined && parent_value !== '') {  
      child.parent_value = parent_value  
    }  
    result.push(child)  

    let children = node.children  
    if (children) {  
      this._extractTree(children, result, node[valueField])  
    }  
  }  
},

操作步骤：

<uni-data-picker :localdata="cityEnum" v-model="defaultCity" popup-title="请选择省市区"
parent-field="type" @change="cityChange" />

预期结果：

能够正常走下，而不是报错

实际结果：

mp.runtime.esm.js?66fd:5818 TypeError: Cannot convert undefined or null to object
at uni-forms-item.vue:250
at Array.forEach (<anonymous>)
at VueComponent.unInit (uni-forms-item.vue:247)
at VueComponent.destroyed (uni-forms-item.vue:186)
at invokeWithErrorHandling (mp.runtime.esm.js?66fd:1862)
at callHook (mp.runtime.esm.js?66fd:4159)
at VueComponent.Vue.$destroy (mp.runtime.esm.js?66fd:4014)
at Ze.detached (index.js?543d:1846)
at o.safeCallback (WASubContext.js?t=wechat&s=1647768240122&v=2.17.0:2)
at o.call (WASubContext.js?t=wechat&s=1647768240122&v=2.17.0:2)