问在多线程环境中使用Mysql++的问题

EN

(gdb) backtrace
#0  clear (this=0xabd4e8) at /usr/include/c++/4.7/bits/basic_string.h:801
#1  ping (this=0xabcf40) at ./lib/dbdriver.h:465
#2  mysqlpp::Connection::ping (this=<optimized out>) at ./lib/connection.cpp:243

    mysqlConnection = new mysqlpp::Connection(false);
    mysqlConnection->set_option(new mysqlpp::ReconnectOption(true)); // Reconnect if session times out

    if(!mysqlConnection->connect("fakeDbName", "fakeHostName",
                                 "fakeUserName", "fakePassword))
    {
        printf("Failed to connect..\n");
    }

    if(!mysqlConnection->thread_aware())
    {
        printf("Mysql++ not compiled with threading support\n");
    }
    else
    {
        printf("Mysql++ compiled with threading support\n");
    }