我们的 Web 应用程序正在使用 Snapping 扩展，正如 Petr Broz 的这篇 博客文章 中所示。我们创建了三个自定义捕捉工具，它们似乎都运行良好。但是，我们注意到该扩展正在从我们的生产环境中记录数千个异常（每次鼠标移动事件时）。

我们无法在开发环境中重现该异常...

我无法从堆栈跟踪中看出是我们的自定义工具导致了异常，还是它们源自 Autodesk 扩展。无论来源是什么，这似乎是一个内部错误，如果您能看看它就太好了：

TypeError: Cannot read properties of undefined (reading 'clone')
    at y.edgeSnapping (https://developer.api.autodesk.com/modelderivative/v2/viewers/7.93.*/extensions/Snapping/Snapping.min.js:17:11896)
    at y.meshSnapping (https://developer.api.autodesk.com/modelderivative/v2/viewers/7.93.*/extensions/Snapping/Snapping.min.js:17:7061)
    at y.snapping3DtoMesh (https://developer.api.autodesk.com/modelderivative/v2/viewers/7.93.*/extensions/Snapping/Snapping.min.js:17:7644)
    at y.snapping3D (https://developer.api.autodesk.com/modelderivative/v2/viewers/7.93.*/extensions/Snapping/Snapping.min.js:17:4681)
    at y.onMouseMove (https://developer.api.autodesk.com/modelderivative/v2/viewers/7.93.*/extensions/Snapping/Snapping.min.js:17:23212)
    at y.handleMouseMove (https://developer.api.autodesk.com/modelderivative/v2/viewers/7.93.*/extensions/Snapping/Snapping.min.js:17:22233)
    at l.__invokeStack (https://developer.api.autodesk.com/modelderivative/v2/viewers/7.93.*/viewer3D.min.js:18:1091171)
    at l.handleMouseMove (https://developer.api.autodesk.com/modelderivative/v2/viewers/7.93.*/viewer3D.min.js:18:1093668)
    at HTMLDivElement.mousemove (https://developer.api.autodesk.com/modelderivative/v2/viewers/7.93.*/viewer3D.min.js:18:1095126)
    at v.invokeTask (https://"our-domain"/polyfills.js:1:2333)