崩溃迷惑，好几天了，急

Cocos2d-x
#1

class ShortestPathStep : public cocos2d::Ref
{
public:
ShortestPathStep();
~ShortestPathStep();
static ShortestPathStep *createWithPosition(const cocos2d::Point &pos);
bool initWithPosition(const cocos2d::Point &pos);
int getFScore() const;
bool isEqual(const ShortestPathStep other) const;
std::string getDescription() const;
CC_SYNTHESIZE(cocos2d::Point, _position, Position);
CC_SYNTHESIZE(int, _gScore, GScore);
CC_SYNTHESIZE(int, _hScore, HScore);
CC_SYNTHESIZE(ShortestPathStep, _parent, Parent);
};
ShortestPathStep *pRet = new ShortestPathStep();
pRet->autorelease();
_shortestPath.pushBack(pRet);
断点进入pushBack内部的retain()崩溃，什么原因啊？

#2

大概是不需要调用autorelease吧，这个在new的时候就调用了，好像。。。