mysql++中connection調(diào)用了2次析構(gòu)函數(shù)

longshadian

隔壁mysql區(qū)沒(méi)人理。。.
最近做的項(xiàng)目數(shù)據(jù)庫(kù)連接用的mysql++,
代碼如下
try {
      mysqlpp::ScopedConnection cp(*mPool,true);
} catch  {
....
}

有時(shí)程序會(huì)掛在ScopedConnection構(gòu)造函數(shù)中，棧如下：
#1  0x00f38d2c in mysqlpp::Connection::~Connection() () from /usr/local/lib/libmysqlpp.so.3
#2  0x00f38dd2 in mysqlpp::Connection::~Connection() () from /usr/local/lib/libmysqlpp.so.3
#3  0x0806e44a in GameServerMysqlConnectPool::destroy (this=0xa9d4088, cp=0xaf17400) at ../game/GameServerMysqlConnectPool.h:75
#4  0x00f3bc1e in mysqlpp::ConnectionPool::remove(std::_List_iterator<mysqlpp::ConnectionPool::ConnectionInfo> const& ()
   from /usr/local/lib/libmysqlpp.so.3
#5  0x00f3bca9 in mysqlpp::ConnectionPool::remove_old_connections() () from /usr/local/lib/libmysqlpp.so.3
#6  0x00f3bf40 in mysqlpp::ConnectionPool::grab() () from /usr/local/lib/libmysqlpp.so.3
#7  0x0806e227 in GameServerMysqlConnectPool::grab (this=0xa9d408 at ../game/GameServerMysqlConnectPool.h:48
#8  0x00f3bda4 in mysqlpp::ConnectionPool::safe_grab() () from /usr/local/lib/libmysqlpp.so.3
#9  0x00f51e10 in mysqlpp::ScopedConnection::ScopedConnection(mysqlpp::ConnectionPool&, bool) ()
   from /usr/local/lib/libmysqlpp.so.3

#3  0x0806e44a in GameServerMysqlConnectPool::destroy (this=0xa9d4088, cp=0xaf17400) at ../game/GameServerMysqlConnectPool.h:75
    virtual void destroy(mysqlpp::Connection* cp)
    {
        delete cp;
    }

一次delete 執(zhí)行了2次析構(gòu)函數(shù)，兩次析構(gòu)函數(shù)的地址還是不同的。真是怪了。
程序很難重現(xiàn)，有沒(méi)有同學(xué)遇到過(guò)這種情況。或者幫忙解釋下大概什么情況下會(huì)出現(xiàn)2次析構(gòu)。
代碼是在多線程中調(diào)用的�？墒俏铱磎ysql++源碼中， mysqlpp::ConnectionPool::grab()是加鎖的，真是郁悶了。