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Creator 版本：v2.0.7
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目标平台：微信小游戏
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详细报错信息，包含调用堆栈：在今天更换了新版本creator后，使用新版本的batch as bitmap调整了一些文字固定的label，发现在有些label勾选batch as bitmap时会弹出警告：
Failed to set property lb_CAPION to true at batchAsBitmap, TypeError: Cannot read property ‘_texture’ of null
at cc_Label._activateMaterial (E:\CocosCreator_v207\resources\engine\bin.cache\dev\cocos2d\core\components\CCLabel.js:384:36)
at cc_Label.set [as batchAsBitmap] (E:\CocosCreator_v207\resources\engine\bin.cache\dev\cocos2d\core\components\CCLabel.js:256:30)
at u (E:\CocosCreator_v207\resources\app.asar\editor\page\scene-utils\set-property-by-path.js:1:2055)
at y (E:\CocosCreator_v207\resources\app.asar\editor\page\scene-utils\set-property-by-path.js:1:3802)
at Object.b [as setPropertyByPath] (E:\CocosCreator_v207\resources\app.asar\editor\page\scene-utils\set-property-by-path.js:1:4969)
at Object.setProperty (E:\CocosCreator_v207\resources\app.asar\editor\page\scene-utils\utils\scene.js:1:8276)
at HTMLElement.set-property (E:\CocosCreator_v207\resources\app.asar\editor\builtin\scene\panel\messages\scene-operation.js:1:782)
at Object.e._dispatch (E:\CocosCreator_v207\resources\app.asar\editor-framework\lib\renderer\panel.js:1:1941)
at EventEmitter.o.on.s (E:\CocosCreator_v207\resources\app.asar\editor-framework\lib\renderer\ipc.js:1:2917)
at emitMany (events.js:127:13)
at EventEmitter.emit (events.js:204:7)
后来发现在label非活跃时勾选该功能就会出现警告，模拟器运行时倒是没发现问题。
取消勾选也会弹出警告。
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重现方式：建立一个button，将编辑器中button设置为非活跃，关闭项目，再次启动后，不要激活button的active，直接设置button下的label的batch as bitmap应该久会弹出这个无用警告了
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编辑器操作系统 ：windows10
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编辑器之前是否有其它报错 ：
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出现概率：基本次次出现
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额外线索：
这是勾选关闭两次batch as bitmap时出现的警告
Failed to set property lb_CAPION to true at batchAsBitmap, TypeError: Cannot read property ‘_texture’ of null
Failed to set property lb_CAPION to false at batchAsBitmap, TypeError: Cannot read property ‘_resetDynamicAtlasFrame’ of null
Failed to set property lb_CAPION to true at batchAsBitmap, TypeError: Cannot read property ‘_texture’ of null
Failed to set property lb_CAPION to false at batchAsBitmap, TypeError: Cannot read property ‘_resetDynamicAtlasFrame’ of null