将输入绑定到array.length时的RangeError

<div ng-app="">
<div ng-controller="MyCtrl">
    <input required type="number" ng-model="teams.length" min="1" max="9">    
    <span>pressing backspace to remove the number causes an exception</span>

    <div ng-repeat="team in teams track by $index">
        team {{$index+1}}
    </div>
</div>
<div ng-app="">
<div ng-controller="MyCtrl">