Uncaught TypeError: CCRenderComponent.js:170

Uncaught TypeError: CCRenderComponent.js:170


I just Cocos creator upgrade from 1.10.2 to 2.0.5 on yesterday cuz Spine bug
and I fixed some errors,
but I can’t solve this error T.T
Can anybody know?

Uncaught TypeError: Cannot read property ‘push’ of null
at cc_Label.requestRenderData (CCRenderComponent.js:170)
at Object.createData (ttf.js:31)
at cc_Label._updateAssembler (CCLabel.js:516)
at cc_Label._updateRenderData (CCLabel.js:600)
at CCLoader. (ttf.js:153)
at CCLoader.js:271
at utils.js:78


can you provide a reproduce demo?It seem has some problems with the ttf label.
are you use some special ttf font?
the font asset that you uesd was broken?