TypeError: Cannot read property ‘dump’ of undefined
at file:///D:/cocoscreator/resources/app.asar/editor/builtin/timeline/panel/timeline.js:1:4465
at Array.forEach (native)
at editor-timeline.selection:selected (file:///D:/cocoscreator/resources/app.asar/editor/builtin/timeline/panel/timeline.js:1:4443)
at EventEmitter. (D:\cocoscreator\resources\app.asar\editor-framework\lib\renderer\ui\utils\polymer-utils.js:1:261)
at emitThree (events.js:121:20)
at EventEmitter.emit (events.js:194:7)
这个报错很蛋疼