如题所示，版本3.13，当EaseCubicActionOut 中调用Repeat时会出现崩溃问题，是怎么回事？
auto needleEndA = Sequence::create(RotateBy::create(0.25, 20),
RotateBy::create(0.25, -20), NULL);
_needle->runAction(EaseCubicActionOut::create(Repeat::create(needleEndA, 8));
当程序运行这得时候target为空崩溃
void RotateBy::startWithTarget(Node *target)
{
ActionInterval::startWithTarget(target);
if(_is3D)
{
_startAngle = target->getRotation3D();
}
else
{
_startAngle.x = target->getRotationSkewX();
_startAngle.y = target->getRotationSkewY();
}
}