Is there any chance you could back-port this to Lua 5.1? There are still many of us that are stuck at the older version for one reason or another. I tried a quick hack at the code but it appears the snapshot doesn't pick up variables marked as "local".

Thanks . . .

example code(test.lua):

local snapshot = require "snapshot"

local function create_co()
    local co_upvalue = { 1,2,3 }
    local co = coroutine.create( function()
        for k,v in pairs( co_upvalue ) do
            print( k,v )
        end
    end )
    return co
end

local S1 = snapshot()

co = create_co()

local S2 = snapshot()

for k,v in pairs(S2) do
    if S1[k] == nil then
        print(k,v)
    end
end

coroutine.resume( co ) -- test,co_upvalue still in memory

output:

lua test.lua
userdata: 0x10be3e8	
0x10ba930 : co

userdata: 0x10c9210	table
0x10ba018 : S1 : test.lua:17

1	1
2	2
3	3

no leak infomation about co_upvalue ?

    local req_name = "ZoneProtocol.GetSceneItemListReq"
    local S1 = snapshot()
    pb.encode(req_name, {sceneid=0})
    local S2 = snapshot()
    for k,v in pairs(S2) do
      if S1[k] == nil then
        print(k,v)
      end
    end

输出：
userdata: 0x7f0b21083cc0 table
0x7f0b1fc8b708 : S1 : ...iao/rp_server/pub/test_robot/bin/service/robot_agent.lua:146

userdata: 0x7f0b2101c040 table
0x7f0b1fca2dc0 : ZoneProtocol.GetSceneItemListReq

It seems that mark_object could be recursively called with large depth, which demands a lot of stack slots.

Could you drop a license file into this project that mentions how this project is licensed. I hope it's a MIT or BSD-flavored license . . . this would make it easier to work with.

Thanks . . .

你好：
我将文件包下载解压后，在centos 7上编译成功，然后直接执行lua dump.lua，出现段错误，没有仔细研究过lua，请问一下是什么原因呢，lua版本是5.1.4