求助：CCRenderTexture引起的崩溃

Cocos2d-x
#1

程序中将CCRenderTexture添加到layer中，运行中一切正常。但是在关闭屏幕再开屏时，程序在执行cocos2d::CCTextureCache::reloadAllTextures()时直接崩溃了。log信息显示是执行reloadAllTextures中kImageData分支引起的崩溃。求助！！！
代码：
//借助CCRenderTexture实现遮罩效果 mTimePanelRT = CCRenderTexture::renderTextureWithWidthAndHeight(sizeRT.width,sizeRT.height);
mTimePanelRT->setPosition(ccp(1019gViewScaleX,72gViewScaleY));
addChild(mTimePanelRT,9);

ccBlendFunc maskBF = {GL_ONE, GL_ZERO};
mTimePanelMask->setBlendFunc(maskBF);
ccBlendFunc disBF = {GL_DST_ALPHA, GL_ZERO};
mTime->setBlendFunc(disBF);

mTimePanelRT->begin();
mTimePanelMask->visit();
mTime->visit();
mTimePanelRT->end(true);