停止mqtt客户端，会出现释放内存异常导致死机

[wen-vancouver]

环境:rtthread标准版，采用kawaii最新版本
调用顺序
先mqtt_disconnect();停止连接
后mqtt_release();释放内存
typedef struct {
// rt_mq_t queue; /< mqtt receive data queue */
uint8_t reconnecttime;//重连次数 用于重启mqtt
mqtt_client_t *client; /< mqtt client */

 bool is_started;

char clientid[128];//clientid=设备id(4bytes)+MAC(6bytes) 组成的字符串

char topo_topic[200];//公共主题缓存
char *data;
int data_len;
char *topic;
int topic_len;

} mesh_mqtt_handle_t;

esp_err_t mesh_mqtt_stop(void)
{
if(g_mesh_mqtt.client==NULL)
{
LOG_I("mqtt client is not connected.");
return ESP_FAIL;
}

mqtt_disconnect(g_mesh_mqtt.client);
mqtt_release(g_mesh_mqtt.client);

LOG_I("mesh_mqtt_stop");

// //心跳任务停止
if(heartbeatHandle)
{
	rt_thread_delete(heartbeatHandle);
	heartbeatHandle=NULL;
}

g_mesh_mqtt.client = NULL;

memset(&g_mesh_mqtt,0,sizeof(g_mesh_mqtt));//全部置0

return ESP_OK;

}