creator2.1.0替换骨骼动画资源动画ske和tex文件时报错，2.1.1替换正常

Creator 2.x
#1

  • Creator 版本：2.1.0

  • 目标平台：web

  • 详细报错信息，包含调用堆栈：
    Uncaught TypeError: Cannot read property ‘animation’ of null
    at dragonBones_ArmatureDisplay._buildArmature (ArmatureDisplay.js:382)
    at dragonBones_ArmatureDisplay._refresh (ArmatureDisplay.js:402)
    at dragonBones_ArmatureDisplay.notify (ArmatureDisplay.js:102)
    at dragonBones_ArmatureDisplay.val.set [as dragonAsset] (preprocess-class.js:64)
    at test.click_1 (test.js:41)
    at cc_ClickEvent.emit (CCComponentEventHandler.js:158)
    at Function.emitEvents (CCComponentEventHandler.js:122)
    at cc_Button._onTouchEnded (CCButton.js:638)
    at EventTarget.190.CallbacksInvoker.invoke (callbacks-invoker.js:255)
    at _doDispatchEvent (CCNode.js:492)

源代码：

properties: {
    ske_1:dragonBones.ArmatureDisplay,
    skeAsset_1:dragonBones.DragonBonesAsset,
    skeAtlas_1:dragonBones.DragonBonesAtlasAsset,
},

// LIFE-CYCLE CALLBACKS:
click_1(){
    this.ske_1.dragonAsset=this.skeAsset_1;
    this.ske_1.dragonAtlasAsset=this.skeAtlas_1;
    this.ske_1.armatureName="armatureName";
    this.ske_1.playAnimation("walk");
},

2.1.0版本下会报错，2.1.1版本正常，2.1.0版本是不是需要一些额外的操作？