【入门夯实】do块收尾：局部变量生命周期的显式管理

local function settleBad(actor)
    actor = getplayerbyname(actor)
    local bigBoard = loadWholeBoard()
    local topOne = bigBoard[1]
    sendmsg(actor, 1, "榜首：" .. tostring(topOne))
    -- 后续 200 行业务逻辑里，bigBoard 一直占着内存
end

local function settleGood(actor)
    actor = getplayerbyname(actor)
    local topOne
    do
        local bigBoard = loadWholeBoard()
        topOne = bigBoard[1]
    end
    sendmsg(actor, 1, "榜首：" .. tostring(topOne))
    do
        local detail = loadDetail(topOne)
        sendmsg(actor, 1, "战力明细：" .. tostring(detail))
    end
end

local saved = DEBUG_ON
do
    DEBUG_ON = true
    runDiagnosis()
end
DEBUG_ON = saved