如何从lua中的dead协程中获取回溯和错误信息

require("debug")

local co = coroutine.create(function()
    -- 执行代码
end)

local success, traceback = coroutine.resume(co)
if not success then
    local level = 1
    while true do
        local info = debug.getinfo(co, level, "nSl")
        if not info then break end
        -- 处理回溯信息
        level = level + 1
    end
end

local co = coroutine.create(function()
    -- 执行代码
end)

local success, traceback = coroutine.resume(co)
if not success then
    local level = 1
    while true do
        local info = debug.getinfo(co, level, "nSl")
        if not info then break end
        local index = 1
        while true do
            local name, value = debug.getlocal(co, level, index)
            if not name then break end
            -- 处理错误信息
            index = index + 1
        end
        level = level + 1
    end
end