func handleRoomLoadState(p *entity.Player, req interface{}) error { pck, ok := req.(*olbattle.RoomLoadState) if !ok { return protocol.ErrorInvalidProtocol } defer func() { pck.PlayerID = p.PlayerID p.SendClient(pck) }() room := GetPlayerRoom(p) if room != nil { room.OnLoadProgress(p, pck.Progress) } else { log.Warningf("[%s:%d]match scene load done, cannot find room", p.GetString(fds.AttrPlayerNameKey), p.GetEntityID()) return protocol.ErrorNotFindRoom } return nil } 如何打印该函数的堆栈回溯

要打印该函数的堆栈回溯，可以在函数内部使用 `panic` 函数，然后在 `defer` 函数中使用 `recover` 函数来获取堆栈信息并打印出来。具体实现如下：

import (
	"fmt"
	"runtime/debug"
)

func handleRoomLoadState(p *entity.Player, req interface{}) error {
	defer func() {
		if r := recover(); r != nil {
			fmt.Println("panic:", r)
			debug.PrintStack()
		}
	}()

	pck, ok := req.(*olbattle.RoomLoadState)
	if !ok {
		return protocol.ErrorInvalidProtocol
	}
	defer func() {
		pck.PlayerID = p.PlayerID
		p.SendClient(pck)
	}()

	room := GetPlayerRoom(p)
	if room != nil {
		room.OnLoadProgress(p, pck.Progress)
	} else {
		log.Warningf("[%s:%d]match scene load done, cannot find room", p.GetString(fds.AttrPlayerNameKey), p.GetEntityID())
		return protocol.ErrorNotFindRoom
	}
	return nil
}

在函数内部使用 `defer` 函数来捕获 panic，然后使用 `recover` 函数获取 panic 信息。如果有 panic 发生，则会打印出错误信息和堆栈回溯。