cocos creator 3.4预制件报错，创建一个button，然后拖动到assets下，编辑预制件报错。

Creator 3.x
#1
  • Creator 版本： 3.4
    项目原本的引擎版本是3.3.2，然后升级到3.4的。
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    创建一个普通的button，然后将button拖动到assets下。
    image
    双击编辑预制件的时候，显示红色，然后报错。
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    image
    image1892×506 103 KB

    Cannot read property ‘_prefab’ of undefined

at /Applications/CocosCreator/Creator/3.4.0/CocosCreator.app/Contents/Resources/app.asar/builtin/engine/dist/editor-extends/utils/prefab.ccc:1:1117

at walkNode (/Applications/CocosCreator/Creator/3.4.0/CocosCreator.app/Contents/Resources/app.asar/builtin/engine/dist/editor-extends/utils/prefab.ccc:1:318)

at Object.addPrefabInfo (/Applications/CocosCreator/Creator/3.4.0/CocosCreator.app/Contents/Resources/app.asar/builtin/engine/dist/editor-extends/utils/prefab.ccc:1:963)

at PrefabUtil.addPrefabInfo (/Applications/CocosCreator/Creator/3.4.0/CocosCreator.app/Contents/Resources/app.asar/builtin/scene/dist/script/3d/manager/prefab/utils.ccc:1:3725)

at NodeOperation.onNodeAdded (/Applications/CocosCreator/Creator/3.4.0/CocosCreator.app/Contents/Resources/app.asar/builtin/scene/dist/script/3d/manager/prefab/node.ccc:1:4168)

at PrefabManager.onNodeAdded (/Applications/CocosCreator/Creator/3.4.0/CocosCreator.app/Contents/Resources/app.asar/builtin/scene/dist/script/3d/manager/prefab/index.ccc:1:707)

at /Applications/CocosCreator/Creator/3.4.0/CocosCreator.app/Contents/Resources/app.asar/builtin/scene/dist/script/3d/facade/general-scene-facade.ccc:1:6749

at Array.forEach ()

at PrefabSceneFacade.dispatchEvents (/Applications/CocosCreator/Creator/3.4.0/CocosCreator.app/Contents/Resources/app.asar/builtin/scene/dist/script/3d/facade/general-scene-facade.ccc:1:6723)

at PrefabSceneFacade.onNodeAdded (/Applications/CocosCreator/Creator/3.4.0/CocosCreator.app/Contents/Resources/app.asar/builtin/scene/dist/script/3d/facade/general-scene-facade.ccc:1:9153)

#3

关闭掉creator，重新打开。按照上面的操作，不会出现这个问题。但是会报另外一个错误。

image
image2274×494 132 KB

拖动button到assets下，然后双击打开，会报这个错误。

[Scene] You are trying to destroy a object twice or more.
at error (/Applications/CocosCreator/Creator/3.4.0/CocosCreator.app/Contents/Resources/resources/3d/engine/bin/.cache/dev/editor/bundled/index.js:136741:10)
at errorID (/Applications/CocosCreator/Creator/3.4.0/CocosCreator.app/Contents/Resources/resources/3d/engine/bin/.cache/dev/editor/bundled/index.js:136948:3)
at Widget._destroyImmediate (/Applications/CocosCreator/Creator/3.4.0/CocosCreator.app/Contents/Resources/resources/3d/engine/bin/.cache/dev/editor/bundled/index.js:127739:26)
at Node._onPreDestroyBase (/Applications/CocosCreator/Creator/3.4.0/CocosCreator.app/Contents/Resources/resources/3d/engine/bin/.cache/dev/editor/bundled/index.js:165604:16)
at Node._onPreDestroy (/Applications/CocosCreator/Creator/3.4.0/CocosCreator.app/Contents/Resources/resources/3d/engine/bin/.cache/dev/editor/bundled/index.js:167656:25)
at Node._destroyImmediate (/Applications/CocosCreator/Creator/3.4.0/CocosCreator.app/Contents/Resources/resources/3d/engine/bin/.cache/dev/editor/bundled/index.js:127749:12)