Access violation on mysql_close with a connection plugin.

int

mthd_my_send_cmd(MYSQL *mysql,enum enum_server_command command, const char *arg,

	       size_t length, my_bool skipp_check, void *opt_arg)

{

......

  if (IS_CONNHDLR_ACTIVE(mysql)) // <- Wrongly thinks that mysql->extension->conn_hdlr has something after free(p) at line 1920

  {

    result= mysql->extension->conn_hdlr->plugin->set_connection(mysql, command, arg, length, skipp_check, opt_arg); // <- Exception!!!

    if (result== -1)

      return(result);

  }

....

    if (mysql->extension && mysql->extension->conn_hdlr)

    {

      MA_CONNECTION_HANDLER *p= mysql->extension->conn_hdlr;

      p->plugin->close(mysql);

      free(p); // <- HERE

    }

    if (mysql->methods)

      mysql->methods->db_close(mysql); // <- Problem!

    if (mysql->extension && mysql->extension->conn_hdlr)

    {

      MA_CONNECTION_HANDLER *p= mysql->extension->conn_hdlr;

      p->plugin->close(mysql);

      free(p);

      mysql->extension->conn_hdlr = NULL; // <- Solution

    }

    if (mysql->methods)

      mysql->methods->db_close(mysql);