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Creator 版本：2.3.4
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目标平台： iOS / Android / 模拟器
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详细报错信息，包含调用堆栈：无报错
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重现方式：加载3.8.84导出的spine文件， 动画皮肤骨骼添加变化约束，动画在web上显示正常，在 iOS / Android / 模拟器 上显示有拉伸
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之前哪个版本是正常的 ：2.3.3上有同样问题
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手机型号 ：
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手机浏览器 ：
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编辑器操作系统 ：
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编辑器之前是否有其它报错 ：无
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出现概率：100%
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额外线索：并且导出.skel二进制格式时会报错 错误信息：
TypeError: Cannot read property ‘getAttachment’ of undefined
at SkeletonBinary.readAnimation (D:\CocosDashboard_1.0.5\resources.editors\Creator\2.3.4\resources\engine\bin.cache\dev\extensions\spine\lib\spine.js:5470:35)
at SkeletonBinary.readSkeletonData (D:\CocosDashboard_1.0.5\resources.editors\Creator\2.3.4\resources\engine\bin.cache\dev\extensions\spine\lib\spine.js:4978:43)
at sp_SkeletonData.getRuntimeData (D:\CocosDashboard_1.0.5\resources.editors\Creator\2.3.4\resources\engine\bin.cache\dev\extensions\spine\skeleton-data.js:264:34)
at sp_SkeletonData.cc.Class.getAnimsEnum (D:\CocosDashboard_1.0.5\resources.editors\Creator\2.3.4\resources\engine\bin.cache\dev\extensions\spine\skeleton-data.js:295:19)
at sp_Skeleton.sp.Skeleton.cc.Class._updateAnimEnum (D:\CocosDashboard_1.0.5\resources.editors\Creator\2.3.4\resources\engine\bin.cache\dev\extensions\spine\Skeleton.js:1380:36)
at sp_Skeleton._refreshInspector (D:\CocosDashboard_1.0.5\resources.editors\Creator\2.3.4\resources\engine\bin.cache\dev\extensions\spine\Skeleton.js:1440:10)
at sp_Skeleton.notify (D:\CocosDashboard_1.0.5\resources.editors\Creator\2.3.4\resources\engine\bin.cache\dev\extensions\spine\Skeleton.js:161:16)
at sp_Skeleton.val.set (D:\CocosDashboard_1.0.5\resources.editors\Creator\2.3.4\resources\engine\bin.cache\dev\cocos2d\core\platform\preprocess-class.js:81:14)
at sp_Skeleton.n.set [as skeletonData] (D:\CocosDashboard_1.0.5\resources.editors\Creator\2.3.4\resources\app.asar\editor\page\scene-utils\lib\asset-watcher.js:1:975)
at D:\CocosDashboard_1.0.5\resources.editors\Creator\2.3.4\resources\app.asar\editor\page\scene-utils\set-property-by-path.js:1:682
